// Copyright 2024 Dolthub, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// Copied from github.com/dolthub/doltgresql/server/config/parameters_list.go
package pgconfig

import (
	"math"
	"strings"
	"time"

	"github.com/dolthub/go-mysql-server/sql"
	"github.com/dolthub/go-mysql-server/sql/types"
)

// IsValidPostgresConfigParameter returns true if the given parameter name is a valid postgres configuration parameter.
func IsValidPostgresConfigParameter(name string) bool {
	_, ok := postgresConfigParameters[strings.ToLower(name)]
	return ok
}

// IsValidDoltConfigParameter returns true if the given parameter name is a valid Dolt configuration parameter.
func IsValidDoltConfigParameter(name string) bool {
	_, ok := doltConfigParameters[strings.ToLower(name)]
	return ok
}

// postgresConfigParameters is a list of configuration parameters that can be used in SET statement.
var postgresConfigParameters = map[string]sql.SystemVariable{
	"allow_in_place_tablespaces": &Parameter{
		Name:      "allow_in_place_tablespaces",
		Default:   int8(0),
		Category:  "Developer Options",
		ShortDesc: "Allows tablespaces directly inside pg_tblspc, for testing.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemBoolType("allow_in_place_tablespaces"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"allow_system_table_mods": &Parameter{
		Name:      "allow_system_table_mods",
		Default:   int8(0),
		Category:  "Developer Options",
		ShortDesc: "Allows modifications of the structure of system tables.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemBoolType("allow_system_table_mods"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"application_name": &Parameter{
		Name:      "application_name",
		Default:   "psql",
		Category:  "Reporting and Logging / What to Log",
		ShortDesc: "Sets the application name to be reported in statistics and logs.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemStringType("application_name"),
		Source:    ParameterSourceClient,
		ResetVal:  "psql",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"archive_cleanup_command": &Parameter{
		Name:      "archive_cleanup_command",
		Default:   "",
		Category:  "Write-Ahead Log / Archive Recovery",
		ShortDesc: "Sets the shell command that will be executed at every restart point.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemStringType("archive_cleanup_command"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"archive_command": &Parameter{
		Name:      "archive_command",
		Default:   "(disabled)",
		Category:  "Write-Ahead Log / Archiving",
		ShortDesc: "Sets the shell command that will be called to archive a WAL file.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemStringType("archive_command"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"archive_library": &Parameter{
		Name:      "archive_library",
		Default:   "",
		Category:  "Write-Ahead Log / Archiving",
		ShortDesc: "Sets the library that will be called to archive a WAL file.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemStringType("archive_library"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"archive_mode": &Parameter{
		Name:      "archive_mode",
		Default:   "off",
		Category:  "Write-Ahead Log / Archiving",
		ShortDesc: "Allows archiving of WAL files using archive_command.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemEnumType("archive_mode", "always", "on", "off"),
		Source:    ParameterSourceDefault,
		ResetVal:  "off",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"archive_timeout": &Parameter{
		Name:    "archive_timeout",
		Default: int64(0),
		// Unit: "s",
		Category:  "Write-Ahead Log / Archiving",
		ShortDesc: "Sets the amount of time to wait before forcing a switch to the next WAL file.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("archive_timeout", 0, 1073741823, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"array_nulls": &Parameter{
		Name:      "array_nulls",
		Default:   int8(1),
		Category:  "Version and Platform Compatibility / Previous PostgreSQL Versions",
		ShortDesc: "Enable input of NULL elements in arrays.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("array_nulls"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"authentication_timeout": &Parameter{
		Name:    "authentication_timeout",
		Default: int64(60),
		// Unit: "s",
		Category:  "Connections and Authentication / Authentication",
		ShortDesc: "Sets the maximum allowed time to complete client authentication.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("authentication_timeout", 1, 600, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(60),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"autovacuum": &Parameter{
		Name:      "autovacuum",
		Default:   int8(1),
		Category:  "Autovacuum",
		ShortDesc: "Starts the autovacuum subprocess.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemBoolType("autovacuum"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"autovacuum_analyze_scale_factor": &Parameter{
		Name:      "autovacuum_analyze_scale_factor",
		Default:   0.1,
		Category:  "Autovacuum",
		ShortDesc: "Number of tuple inserts, updates, or deletes prior to analyze as a fraction of reltuples.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemDoubleType("autovacuum_analyze_scale_factor", 0, 100),
		Source:    ParameterSourceDefault,
		ResetVal:  0.1,
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"autovacuum_analyze_threshold": &Parameter{
		Name:      "autovacuum_analyze_threshold",
		Default:   int64(50),
		Category:  "Autovacuum",
		ShortDesc: "Minimum number of tuple inserts, updates, or deletes prior to analyze.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("autovacuum_analyze_threshold", 0, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(50),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"autovacuum_freeze_max_age": &Parameter{
		Name:      "autovacuum_freeze_max_age",
		Default:   int64(2000000000),
		Category:  "Autovacuum",
		ShortDesc: "Age at which to autovacuum a table to prevent transaction ID wraparound.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemIntType("autovacuum_freeze_max_age", 100000, 2000000000, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(2000000000),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"autovacuum_max_workers": &Parameter{
		Name:      "autovacuum_max_workers",
		Default:   int64(3),
		Category:  "Autovacuum",
		ShortDesc: "Sets the maximum number of simultaneously running autovacuum worker processes.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemIntType("autovacuum_max_workers", 1, 262143, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(3),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"autovacuum_multixact_freeze_max_age": &Parameter{
		Name:      "autovacuum_multixact_freeze_max_age",
		Default:   int64(400000000),
		Category:  "Autovacuum",
		ShortDesc: "Multixact age at which to autovacuum a table to prevent multixact wraparound.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemIntType("autovacuum_multixact_freeze_max_age", 10000, 2000000000, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(400000000),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"autovacuum_naptime": &Parameter{
		Name:    "autovacuum_naptime",
		Default: int64(60),
		// Unit: "s",
		Category:  "Autovacuum",
		ShortDesc: "Time to sleep between autovacuum runs.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("autovacuum_naptime", 1, 2147483, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(60),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"autovacuum_vacuum_cost_delay": &Parameter{
		Name:    "autovacuum_vacuum_cost_delay",
		Default: float64(2),
		// Unit: "ms",
		Category:  "Autovacuum",
		ShortDesc: "Vacuum cost delay in milliseconds, for autovacuum.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemDoubleType("autovacuum_vacuum_cost_delay", -1, 100),
		Source:    ParameterSourceDefault,
		ResetVal:  float64(2),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"autovacuum_vacuum_cost_limit": &Parameter{
		Name:      "autovacuum_vacuum_cost_limit",
		Default:   int64(-1),
		Category:  "Autovacuum",
		ShortDesc: "Vacuum cost amount available before napping, for autovacuum.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("autovacuum_vacuum_cost_limit", -1, 10000, true),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(-1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"autovacuum_vacuum_insert_scale_factor": &Parameter{
		Name:      "autovacuum_vacuum_insert_scale_factor",
		Default:   float64(0.2),
		Category:  "Autovacuum",
		ShortDesc: "Number of tuple inserts prior to vacuum as a fraction of reltuples.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemDoubleType("autovacuum_vacuum_insert_scale_factor", 0, 100),
		Source:    ParameterSourceDefault,
		ResetVal:  float64(0.2),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"autovacuum_vacuum_insert_threshold": &Parameter{
		Name:      "autovacuum_vacuum_insert_threshold",
		Default:   int64(1000),
		Category:  "Autovacuum",
		ShortDesc: "SMinimum number of tuple inserts prior to vacuum, or -1 to disable insert vacuums.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("autovacuum_vacuum_insert_threshold", -1, math.MaxInt32, true),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(1000),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"autovacuum_vacuum_scale_factor": &Parameter{
		Name:      "autovacuum_vacuum_scale_factor",
		Default:   float64(0.2),
		Category:  "Autovacuum",
		ShortDesc: "Number of tuple updates or deletes prior to vacuum as a fraction of reltuples.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemDoubleType("autovacuum_vacuum_scale_factor", 0, 100),
		Source:    ParameterSourceDefault,
		ResetVal:  float64(0.2),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"autovacuum_vacuum_threshold": &Parameter{
		Name:      "autovacuum_vacuum_threshold",
		Default:   int64(50),
		Category:  "Autovacuum",
		ShortDesc: "Minimum number of tuple updates or deletes prior to vacuum.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("autovacuum_vacuum_threshold", 0, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(50),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"autovacuum_work_mem": &Parameter{
		Name:    "autovacuum_work_mem",
		Default: int64(-1),
		// Unit: "kB",
		Category:  "Resource Usage / Memory",
		ShortDesc: "Sets the maximum memory to be used by each autovacuum worker process.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("autovacuum_work_mem", -1, math.MaxInt32, true),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(-1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"backend_flush_after": &Parameter{
		Name:    "backend_flush_after",
		Default: int64(0),
		// Unit: "8kB",
		Category:  "Resource Usage / Asynchronous Behavior",
		ShortDesc: "Number of pages after which previously performed writes are flushed to disk.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("backend_flush_after", 0, 256, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"backslash_quote": &Parameter{
		Name:      "backslash_quote",
		Default:   "safe_encoding",
		Category:  "Version and Platform Compatibility / Previous PostgreSQL Versions",
		ShortDesc: "Sets whether \"\\'\" is allowed in string literals.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemEnumType("backslash_quote", "safe_encoding", "on", "ff"),
		Source:    ParameterSourceDefault,
		ResetVal:  "safe_encoding",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"backtrace_functions": &Parameter{
		Name:      "backtrace_functions",
		Default:   "",
		Category:  "Developer Options",
		ShortDesc: "Log backtrace for errors in these functions.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemStringType("backtrace_functions"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"bgwriter_delay": &Parameter{
		Name:      "bgwriter_delay",
		Default:   int64(200),
		Category:  "Resource Usage / Background Writer",
		ShortDesc: "Background writer sleep time between rounds.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("bgwriter_delay", 10, 10000, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(200),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"bgwriter_flush_after": &Parameter{
		Name:    "bgwriter_flush_after",
		Default: int64(0),
		// Unit: "8kB",
		Category:  "Resource Usage / Background Writer",
		ShortDesc: "Number of pages after which previously performed writes are flushed to disk.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("bgwriter_flush_after", 0, 256, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"bgwriter_lru_maxpages": &Parameter{
		Name:      "bgwriter_lru_maxpages",
		Default:   int64(100),
		Category:  "Resource Usage / Background Writer",
		ShortDesc: "Background writer maximum number of LRU pages to flush per round.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("bgwriter_lru_maxpages", 0, 1073741823, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(100),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"bgwriter_lru_multiplier": &Parameter{
		Name:      "bgwriter_lru_multiplier",
		Default:   float64(2),
		Category:  "Resource Usage / Background Writer",
		ShortDesc: "Multiple of the average buffer usage to free per round.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemDoubleType("bgwriter_lru_multiplier", 0, 10),
		Source:    ParameterSourceDefault,
		ResetVal:  float64(2),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"block_size": &Parameter{
		Name:      "block_size",
		Default:   int64(8192),
		Category:  "Preset Options",
		ShortDesc: "Shows the size of a disk block.",
		Context:   ParameterContextInternal,
		Type:      types.NewSystemIntType("block_size", 8192, 8192, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(8192),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"bonjour": &Parameter{
		Name:      "bonjour",
		Default:   int8(0),
		Category:  "Connections and Authentication / Connection Settings",
		ShortDesc: "Enables advertising the server via Bonjour.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemBoolType("bonjour"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"bonjour_name": &Parameter{
		Name:      "bonjour_name",
		Default:   "",
		Category:  "Connections and Authentication / Connection Settings",
		ShortDesc: "Sets the Bonjour service name.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemStringType("bonjour_name"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"bytea_output": &Parameter{
		Name:      "bytea_output",
		Default:   "hex",
		Category:  "Client Connection Defaults / Statement Behavior",
		ShortDesc: "Sets the output format for bytea.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemEnumType("bytea_output", "escape", "hex"),
		Source:    ParameterSourceDefault,
		ResetVal:  "hex",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"check_function_bodies": &Parameter{
		Name:      "check_function_bodies",
		Default:   int8(1),
		Category:  "Client Connection Defaults / Statement Behavior",
		ShortDesc: "Check routine bodies during CREATE FUNCTION and CREATE PROCEDURE.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("check_function_bodies"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"checkpoint_completion_target": &Parameter{
		Name:      "checkpoint_completion_target",
		Default:   float64(0.9),
		Category:  "Write-Ahead Log / Checkpoints",
		ShortDesc: "Time spent flushing dirty buffers during checkpoint, as fraction of checkpoint interval.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemDoubleType("checkpoint_completion_target", 0, 1),
		Source:    ParameterSourceDefault,
		ResetVal:  float64(0.9),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"checkpoint_flush_after": &Parameter{
		Name:    "checkpoint_flush_after",
		Default: int64(0),
		// Unit: "8kB",
		Category:  "Write-Ahead Log / Checkpoints",
		ShortDesc: "Number of pages after which previously performed writes are flushed to disk.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("checkpoint_flush_after", 0, 256, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"checkpoint_timeout": &Parameter{
		Name:    "checkpoint_timeout",
		Default: int64(300),
		// Unit: "s",
		Category:  "Write-Ahead Log / Checkpoints",
		ShortDesc: "Sets the maximum time between automatic WAL checkpoints.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("checkpoint_timeout", 30, 86400, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(300),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"checkpoint_warning": &Parameter{
		Name:    "checkpoint_warning",
		Default: int64(30),
		// Unit: "s",
		Category:  "Write-Ahead Log / Checkpoints",
		ShortDesc: "Sets the maximum time before warning if checkpoints triggered by WAL volume happen too frequently.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("checkpoint_warning", 0, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(30),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"client_connection_check_interval": &Parameter{
		Name:    "client_connection_check_interval",
		Default: int64(0),
		// Unit: "ms",
		Category:  "Connections and Authentication / TCP Settings",
		ShortDesc: "Sets the time interval between checks for disconnection while running queries.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("client_connection_check_interval", 0, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"client_encoding": &Parameter{
		Name:      "client_encoding",
		Default:   "UTF8",
		Category:  "Client Connection Defaults / Locale and Formatting",
		ShortDesc: "Sets the client's character set encoding.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemStringType("client_encoding"),
		Source:    ParameterSourceClient,
		// BootVal: "SQL_ASCII",
		ResetVal: "UTF8",
		Scope:    GetPgsqlScope(PsqlScopeSession),
	},
	"client_min_messages": &Parameter{
		Name:      "client_min_messages",
		Default:   "notice",
		Category:  "Client Connection Defaults / Statement Behavior",
		ShortDesc: "Sets the message levels that are sent to the client.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemEnumType("client_min_messages", "debug5", "debug4", "debug3", "debug2", "debug1", "log", "notice", "warning", "error"),
		Source:    ParameterSourceDefault,
		ResetVal:  "notice",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"cluster_name": &Parameter{
		Name:      "cluster_name",
		Default:   "",
		Category:  "Reporting and Logging / Process Title",
		ShortDesc: "Sets the name of the cluster, which is included in the process title.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemStringType("cluster_name"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"commit_delay": &Parameter{
		Name:      "commit_delay",
		Default:   int64(0),
		Category:  "Write-Ahead Log / Settings",
		ShortDesc: "Sets the delay in microseconds between transaction commit and flushing WAL to disk.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemIntType("commit_delay", 0, 100000, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"commit_siblings": &Parameter{
		Name:      "commit_siblings",
		Default:   int64(5),
		Category:  "Write-Ahead Log / Settings",
		ShortDesc: "Sets the minimum number of concurrent open transactions required before performing commit_delay.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("commit_siblings", 0, 1000, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(5),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"compute_query_id": &Parameter{
		Name:      "compute_query_id",
		Default:   "auto",
		Category:  "Statistics / Monitoring",
		ShortDesc: "Enables in-core computation of query identifiers.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemEnumType("compute_query_id", "auto", "regress", "on", "off"),
		Source:    ParameterSourceDefault,
		ResetVal:  "auto",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"config_file": &Parameter{
		Name:      "config_file",
		Default:   "postgresql.conf",
		Category:  "File Locations",
		ShortDesc: "Sets the server's main configuration file.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemStringType("config_file"),
		Source:    ParameterSourceOverride,
		ResetVal:  "postgresql.conf",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"constraint_exclusion": &Parameter{
		Name:      "constraint_exclusion",
		Default:   "partition",
		Category:  "Query Tuning / Other Planner Options",
		ShortDesc: "Enables the planner to use constraints to optimize queries.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemEnumType("constraint_exclusion", "partition", "on", "off"),
		Source:    ParameterSourceDefault,
		ResetVal:  "partition",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"cpu_index_tuple_cost": &Parameter{
		Name:      "cpu_index_tuple_cost",
		Default:   float64(0.005),
		Category:  "Query Tuning / Planner Cost Constants",
		ShortDesc: "Sets the planner's estimate of the cost of processing each index entry during an index scan.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemDoubleType("cpu_index_tuple_cost", 0, math.MaxFloat64),
		Source:    ParameterSourceDefault,
		ResetVal:  float64(0.005),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"cpu_operator_cost": &Parameter{
		Name:      "cpu_operator_cost",
		Default:   float64(0.0025),
		Category:  "Query Tuning / Planner Cost Constants",
		ShortDesc: "Sets the planner's estimate of the cost of processing each operator or function call.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemDoubleType("cpu_operator_cost", 0, math.MaxFloat64),
		Source:    ParameterSourceDefault,
		ResetVal:  float64(0.0025),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"cpu_tuple_cost": &Parameter{
		Name:      "cpu_tuple_cost",
		Default:   float64(0.01),
		Category:  "Query Tuning / Planner Cost Constants",
		ShortDesc: "Sets the planner's estimate of the cost of processing each tuple (row).",
		Context:   ParameterContextUser,
		Type:      types.NewSystemDoubleType("cpu_tuple_cost", 0, math.MaxFloat64),
		Source:    ParameterSourceDefault,
		ResetVal:  float64(0.01),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"createrole_self_grant": &Parameter{
		Name:      "createrole_self_grant",
		Default:   "",
		Category:  "Client Connection Defaults / Statement Behavior",
		ShortDesc: "Sets whether a CREATEROLE user automatically grants the role to themselves, and with which options.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemStringType("createrole_self_grant"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
		// The value must be `set`, `inherit`, or a comma-separated list of these. The default value is an empty string, which disables the feature.
	},
	"cursor_tuple_fraction": &Parameter{
		Name:      "cursor_tuple_fraction",
		Default:   float64(0.1),
		Category:  "Query Tuning / Other Planner Options",
		ShortDesc: "Sets the planner's estimate of the fraction of a cursor's rows that will be retrieved.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemDoubleType("cursor_tuple_fraction", 0, 1),
		Source:    ParameterSourceDefault,
		ResetVal:  float64(0.1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"data_checksums": &Parameter{
		Name:      "data_checksums",
		Default:   int8(0),
		Category:  "Preset Options",
		ShortDesc: "Shows whether data checksums are turned on for this cluster.",
		Context:   ParameterContextInternal,
		Type:      types.NewSystemBoolType("data_checksums"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"data_directory": &Parameter{
		Name:      "data_directory",
		Default:   "postgres",
		Category:  "File Locations",
		ShortDesc: "Sets the server's data directory.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemStringType("data_directory"),
		Source:    ParameterSourceOverride,
		ResetVal:  "postgres",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"data_directory_mode": &Parameter{
		Name:      "data_directory_mode",
		Default:   int64(448), // TODO: displays in octal, which is 0700
		Category:  "Preset Options",
		ShortDesc: "Shows the mode of the data directory.",
		Context:   ParameterContextInternal,
		Type:      types.NewSystemIntType("data_directory_mode", 0, 511, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(448),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"data_sync_retry": &Parameter{
		Name:      "data_sync_retry",
		Default:   int8(0),
		Category:  "Error Handling",
		ShortDesc: "Whether to continue running after a failure to sync data files.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemBoolType("data_sync_retry"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"datestyle": &Parameter{
		Name:      "DateStyle",
		Default:   "ISO, MDY",
		Category:  "Client Connection Defaults / Locale and Formatting",
		ShortDesc: "Sets the display format for date and time values.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemStringType("datestyle"),
		Source:    ParameterSourceConfigurationFile,
		ResetVal:  "ISO, MDY",
		// Sourcefile: postgresql.conf
		Scope: GetPgsqlScope(PsqlScopeSession),
	},
	"db_user_namespace": &Parameter{
		Name:      "db_user_namespace",
		Default:   int8(0),
		Category:  "Connections and Authentication / Authentication",
		ShortDesc: "Enables per-database user names.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemBoolType("db_user_namespace"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"deadlock_timeout": &Parameter{
		Name:    "deadlock_timeout",
		Default: int64(1000),
		// Unit: "ms",
		Category:  "Lock Management",
		ShortDesc: "Sets the time to wait on a lock before checking for deadlock.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemIntType("deadlock_timeout", 1, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(1000),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"debug_assertions": &Parameter{
		Name:      "debug_assertions",
		Default:   int8(0),
		Category:  "Preset Options",
		ShortDesc: "Shows whether the running server has assertion checks enabled.",
		Context:   ParameterContextInternal,
		Type:      types.NewSystemBoolType("debug_assertions"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"debug_discard_caches": &Parameter{
		Name:      "debug_discard_caches",
		Default:   int64(0),
		Category:  "Developer Options",
		ShortDesc: "Aggressively flush system caches for debugging purposes.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemIntType("debug_discard_caches", 0, 0, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"debug_io_direct": &Parameter{
		Name:      "debug_io_direct",
		Default:   "",
		Category:  "Developer Options",
		ShortDesc: "Use direct I/O for file access.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemStringType("debug_io_direct"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"debug_logical_replication_streaming": &Parameter{
		Name:      "debug_logical_replication_streaming",
		Default:   "buffered",
		Category:  "Developer Options",
		ShortDesc: "Forces immediate streaming or serialization of changes in large transactions.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemEnumType("debug_logical_replication_streaming", "buffered", "immediate"),
		Source:    ParameterSourceDefault,
		ResetVal:  "buffered",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"debug_parallel_query": &Parameter{
		Name:      "debug_parallel_query",
		Default:   "off",
		Category:  "Developer Options",
		ShortDesc: "Forces the planner's use parallel query nodes.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemEnumType("debug_parallel_query", "off", "on", "regress"),
		Source:    ParameterSourceDefault,
		ResetVal:  "off",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"debug_pretty_print": &Parameter{
		Name:      "debug_pretty_print",
		Default:   int8(1),
		Category:  "Reporting and Logging / What to Log",
		ShortDesc: "Indents parse and plan tree displays.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("debug_pretty_print"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"debug_print_parse": &Parameter{
		Name:      "debug_print_parse",
		Default:   int8(0),
		Category:  "Reporting and Logging / What to Log",
		ShortDesc: "Logs each query's parse tree.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("debug_print_parse"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"debug_print_plan": &Parameter{
		Name:      "debug_print_plan",
		Default:   int8(0),
		Category:  "Reporting and Logging / What to Log",
		ShortDesc: "Sets the shell command that will be executed at every restart point.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("debug_print_plan"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"debug_print_rewritten": &Parameter{
		Name:      "debug_print_rewritten",
		Default:   int8(0),
		Category:  "Reporting and Logging / What to Log",
		ShortDesc: "Logs each query's rewritten parse tree.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("debug_print_rewritten"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"default_statistics_target": &Parameter{
		Name:      "default_statistics_target",
		Default:   int64(100),
		Category:  "Query Tuning / Other Planner Options",
		ShortDesc: "Sets the default statistics target.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("default_statistics_target", 1, 10000, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(100),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"default_table_access_method": &Parameter{
		Name:      "default_table_access_method",
		Default:   "heap",
		Category:  "Client Connection Defaults / Statement Behavior",
		ShortDesc: "Sets the default table access method for new tables.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemStringType("default_table_access_method"),
		Source:    ParameterSourceDefault,
		ResetVal:  "heap",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"default_tablespace": &Parameter{
		Name:      "default_tablespace",
		Default:   "",
		Category:  "Client Connection Defaults / Statement Behavior",
		ShortDesc: "Sets the default tablespace to create tables and indexes in.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemStringType("default_tablespace"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"default_text_search_config": &Parameter{
		Name:      "default_text_search_config",
		Default:   "pg_catalog.english",
		Category:  "Client Connection Defaults / Locale and Formatting",
		ShortDesc: "Sets default text search configuration.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemStringType("default_text_search_config"),
		Source:    ParameterSourceConfigurationFile,
		// BootVal: "pg_catalog.simple",
		ResetVal: "pg_catalog.english",
		Scope:    GetPgsqlScope(PsqlScopeSession),
	},
	"default_toast_compression": &Parameter{
		Name:      "default_toast_compression",
		Default:   "pglz",
		Category:  "Client Connection Defaults / Statement Behavior",
		ShortDesc: "Sets the default compression method for compressible values.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemEnumType("default_toast_compression", "pglz", "lz4"),
		Source:    ParameterSourceDefault,
		ResetVal:  "pglz",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"default_transaction_deferrable": &Parameter{
		Name:      "default_transaction_deferrable",
		Default:   int8(0),
		Category:  "Client Connection Defaults / Statement Behavior",
		ShortDesc: "Sets the default deferrable status of new transactions.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("default_transaction_deferrable"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"default_transaction_isolation": &Parameter{
		Name:      "default_transaction_isolation",
		Default:   "read-committed",
		Category:  "Client Connection Defaults / Statement Behavior",
		ShortDesc: "Sets the transaction isolation level of each new transaction.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemEnumType("default_transaction_isolation", "serializable", "repeatable-read", "read-committed", "read-uncommitted"),
		Source:    ParameterSourceDefault,
		ResetVal:  "read-committed",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"default_transaction_read_only": &Parameter{
		Name:      "default_transaction_read_only",
		Default:   int8(0),
		Category:  "Client Connection Defaults / Statement Behavior",
		ShortDesc: "Sets the default read-only status of new transactions.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("default_transaction_read_only"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"dynamic_library_path": &Parameter{
		Name:      "dynamic_library_path",
		Default:   "$libdir",
		Category:  "Client Connection Defaults / Other Defaults",
		ShortDesc: "Sets the path for dynamically loadable modules.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemStringType("dynamic_library_path"),
		Source:    ParameterSourceDefault,
		ResetVal:  "$libdir",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"dynamic_shared_memory_type": &Parameter{
		Name:      "dynamic_shared_memory_type",
		Default:   "posix",
		Category:  "Resource Usage / Memory",
		ShortDesc: "Selects the dynamic shared memory implementation used.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemEnumType("dynamic_shared_memory_type", "posix", "sysv", "mmap"),
		Source:    ParameterSourceConfigurationFile,
		ResetVal:  "posix",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"effective_cache_size": &Parameter{
		Name:    "effective_cache_size",
		Default: int64(524288),
		// Unit: "8kB",
		Category:  "Query Tuning / Planner Cost Constants",
		ShortDesc: "Sets the planner's assumption about the total size of the data caches.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("effective_cache_size", 1, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(524288),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"effective_io_concurrency": &Parameter{
		Name:      "effective_io_concurrency",
		Default:   int64(0),
		Category:  "Resource Usage / Asynchronous Behavior",
		ShortDesc: "Number of simultaneous requests that can be handled efficiently by the disk subsystem.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("effective_io_concurrency", 0, 1000, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"enable_async_append": &Parameter{
		Name:      "enable_async_append",
		Default:   int8(1),
		Category:  "Query Tuning / Planner Method Configuration",
		ShortDesc: "Enables the planner's use of async append plans.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("enable_async_append"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"enable_bitmapscan": &Parameter{
		Name:      "enable_bitmapscan",
		Default:   int8(1),
		Category:  "Query Tuning / Planner Method Configuration",
		ShortDesc: "Enables the planner's use of bitmap-scan plans.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("enable_bitmapscan"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"enable_gathermerge": &Parameter{
		Name:      "enable_gathermerge",
		Default:   int8(1),
		Category:  "Query Tuning / Planner Method Configuration",
		ShortDesc: "Enables the planner's use of gather merge plans.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("enable_gathermerge"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"enable_hashagg": &Parameter{
		Name:      "enable_hashagg",
		Default:   int8(1),
		Category:  "Query Tuning / Planner Method Configuration",
		ShortDesc: "Enables the planner's use of hashed aggregation plans.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("enable_hashagg"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"enable_hashjoin": &Parameter{
		Name:      "enable_hashjoin",
		Default:   int8(1),
		Category:  "Query Tuning / Planner Method Configuration",
		ShortDesc: "Enables the planner's use of hash join plans.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("enable_hashjoin"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"enable_incremental_sort": &Parameter{
		Name:      "enable_incremental_sort",
		Default:   int8(1),
		Category:  "Query Tuning / Planner Method Configuration",
		ShortDesc: "Enables the planner's use of incremental sort steps.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("enable_incremental_sort"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"enable_indexonlyscan": &Parameter{
		Name:      "enable_indexonlyscan",
		Default:   int8(1),
		Category:  "Query Tuning / Planner Method Configuration",
		ShortDesc: "Enables the planner's use of index-only-scan plans.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("enable_indexonlyscan"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"enable_indexscan": &Parameter{
		Name:      "enable_indexscan",
		Default:   int8(1),
		Category:  "Query Tuning / Planner Method Configuration",
		ShortDesc: "Enables the planner's use of index-scan plans.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("enable_indexscan"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"enable_material": &Parameter{
		Name:      "enable_material",
		Default:   int8(1),
		Category:  "Query Tuning / Planner Method Configuration",
		ShortDesc: "Enables the planner's use of materialization.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("enable_material"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"enable_memoize": &Parameter{
		Name:      "enable_memoize",
		Default:   int8(1),
		Category:  "Query Tuning / Planner Method Configuration",
		ShortDesc: "Enables the planner's use of memoization.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("enable_memoize"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"enable_mergejoin": &Parameter{
		Name:      "enable_mergejoin",
		Default:   int8(1),
		Category:  "Query Tuning / Planner Method Configuration",
		ShortDesc: "Enables the planner's use of merge join plans.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("enable_mergejoin"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"enable_nestloop": &Parameter{
		Name:      "enable_nestloop",
		Default:   int8(1),
		Category:  "Query Tuning / Planner Method Configuration",
		ShortDesc: "Enables the planner's use of nested-loop join plans.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("enable_nestloop"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"enable_parallel_append": &Parameter{
		Name:      "enable_parallel_append",
		Default:   int8(1),
		Category:  "Query Tuning / Planner Method Configuration",
		ShortDesc: "Enables the planner's use of parallel append plans.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("enable_parallel_append"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"enable_parallel_hash": &Parameter{
		Name:      "enable_parallel_hash",
		Default:   int8(1),
		Category:  "Query Tuning / Planner Method Configuration",
		ShortDesc: "Enables the planner's use of parallel hash plans.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("enable_parallel_hash"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"enable_partition_pruning": &Parameter{
		Name:      "enable_partition_pruning",
		Default:   int8(1),
		Category:  "Query Tuning / Planner Method Configuration",
		ShortDesc: "Enables plan-time and execution-time partition pruning.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("enable_partition_pruning"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"enable_partitionwise_aggregate": &Parameter{
		Name:      "enable_partitionwise_aggregate",
		Default:   int8(0),
		Category:  "Query Tuning / Planner Method Configuration",
		ShortDesc: "Enables partitionwise aggregation and grouping.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("enable_partitionwise_aggregate"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"enable_partitionwise_join": &Parameter{
		Name:      "enable_partitionwise_join",
		Default:   int8(0),
		Category:  "Query Tuning / Planner Method Configuration",
		ShortDesc: "Enables partitionwise join.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("enable_partitionwise_join"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"enable_presorted_aggregate": &Parameter{
		Name:      "enable_presorted_aggregate",
		Default:   int8(1),
		Category:  "Query Tuning / Planner Method Configuration",
		ShortDesc: "Enables the planner's ability to produce plans that provide presorted input for ORDER BY / DISTINCT aggregate functions.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("enable_presorted_aggregate"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"enable_seqscan": &Parameter{
		Name:      "enable_seqscan",
		Default:   int8(1),
		Category:  "Query Tuning / Planner Method Configuration",
		ShortDesc: "Enables the planner's use of sequential-scan plans.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("enable_seqscan"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"enable_sort": &Parameter{
		Name:      "enable_sort",
		Default:   int8(1),
		Category:  "Query Tuning / Planner Method Configuration",
		ShortDesc: "Enables the planner's use of explicit sort steps.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("enable_sort"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"enable_tidscan": &Parameter{
		Name:      "enable_tidscan",
		Default:   int8(1),
		Category:  "Query Tuning / Planner Method Configuration",
		ShortDesc: "Enables the planner's use of TID scan plans.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("enable_tidscan"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"escape_string_warning": &Parameter{
		Name:      "escape_string_warning",
		Default:   int8(1),
		Category:  "Version and Platform Compatibility / Previous PostgreSQL Versions",
		ShortDesc: "Warn about backslash escapes in ordinary string literals.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("escape_string_warning"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"event_source": &Parameter{
		Name:      "event_source",
		Default:   "PostgreSQL",
		Category:  "Reporting and Logging / Where to Log",
		ShortDesc: "Sets the application name used to identify PostgreSQL messages in the event log.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemStringType("event_source"),
		Source:    ParameterSourceDefault,
		ResetVal:  "PostgreSQL",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"exit_on_error": &Parameter{
		Name:      "exit_on_error",
		Default:   int8(0),
		Category:  "Error Handling",
		ShortDesc: "Terminate session on any error.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("exit_on_error"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"external_pid_file": &Parameter{
		Name:      "external_pid_file",
		Default:   "",
		Category:  "File Locations",
		ShortDesc: "Writes the postmaster PID to the specified file.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemStringType("external_pid_file"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"extra_float_digits": &Parameter{
		Name:      "extra_float_digits",
		Default:   int64(1),
		Category:  "Client Connection Defaults / Locale and Formatting",
		ShortDesc: "Sets the number of digits displayed for floating-point values.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("extra_float_digits", -15, 3, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"from_collapse_limit": &Parameter{
		Name:      "from_collapse_limit",
		Default:   int64(8),
		Category:  "Query Tuning / Other Planner Options",
		ShortDesc: "Sets the FROM-list size beyond which subqueries are not collapsed.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("from_collapse_limit", 1, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(8),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"fsync": &Parameter{
		Name:      "fsync",
		Default:   int8(1),
		Category:  "Write-Ahead Log / Settings",
		ShortDesc: "Forces synchronization of updates to disk.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemBoolType("fsync"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"full_page_writes": &Parameter{
		Name:      "full_page_writes",
		Default:   int8(1),
		Category:  "Write-Ahead Log / Settings",
		ShortDesc: "Writes full pages to WAL when first modified after a checkpoint.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemBoolType("full_page_writes"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"geqo": &Parameter{
		Name:      "geqo",
		Default:   int8(1),
		Category:  "Query Tuning / Genetic Query Optimizer",
		ShortDesc: "Enables genetic query optimization.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("geqo"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"geqo_effort": &Parameter{
		Name:      "geqo_effort",
		Default:   int64(5),
		Category:  "Query Tuning / Genetic Query Optimizer",
		ShortDesc: "GEQO: effort is used to set the default for other GEQO parameters.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("geqo_effort", 1, 10, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(5),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"geqo_generations": &Parameter{
		Name:      "geqo_generations",
		Default:   int64(0),
		Category:  "Query Tuning / Genetic Query Optimizer",
		ShortDesc: "GEQO: number of iterations of the algorithm.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("geqo_generations", 0, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"geqo_pool_size": &Parameter{
		Name:      "geqo_pool_size",
		Default:   int64(0),
		Category:  "Query Tuning / Genetic Query Optimizer",
		ShortDesc: "GEQO: number of individuals in the population.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("geqo_pool_size", 0, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"geqo_seed": &Parameter{
		Name:      "geqo_seed",
		Default:   float64(0),
		Category:  "Query Tuning / Genetic Query Optimizer",
		ShortDesc: "GEQO: seed for random path selection.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemDoubleType("geqo_seed", 0, 1),
		Source:    ParameterSourceDefault,
		ResetVal:  float64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"geqo_selection_bias": &Parameter{
		Name:      "geqo_selection_bias",
		Default:   float64(2),
		Category:  "Query Tuning / Genetic Query Optimizer",
		ShortDesc: "GEQO: selective pressure within the population.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemDoubleType("geqo_selection_bias", 1.5, 2),
		Source:    ParameterSourceDefault,
		ResetVal:  float64(2),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"geqo_threshold": &Parameter{
		Name:      "geqo_threshold",
		Default:   int64(12),
		Category:  "Query Tuning / Genetic Query Optimizer",
		ShortDesc: "Sets the shell command that will be executed at every restart point.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("geqo_threshold", 2, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(12),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"gin_fuzzy_search_limit": &Parameter{
		Name:      "gin_fuzzy_search_limit",
		Default:   int64(0),
		Category:  "Client Connection Defaults / Other Defaults",
		ShortDesc: "Sets the maximum allowed result for exact search by GIN.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("gin_fuzzy_search_limit", 0, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"gin_pending_list_limit": &Parameter{
		Name:    "gin_pending_list_limit",
		Default: int64(4096),
		// Unit: "kB",
		Category:  "Client Connection Defaults / Statement Behavior",
		ShortDesc: "Sets the maximum size of the pending list for GIN index.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("gin_pending_list_limit", 64, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(4096),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"gss_accept_delegation": &Parameter{
		Name:      "gss_accept_delegation",
		Default:   int8(0),
		Category:  "Connections and Authentication / Authentication",
		ShortDesc: "Sets whether GSSAPI delegation should be accepted from the client.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemBoolType("gss_accept_delegation"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"hash_mem_multiplier": &Parameter{
		Name:      "hash_mem_multiplier",
		Default:   float64(2),
		Category:  "Resource Usage / Memory",
		ShortDesc: "Multiple of work_mem to use for hash tables.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemDoubleType("hash_mem_multiplier", 1, 1000),
		Source:    ParameterSourceDefault,
		ResetVal:  float64(2),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"hba_file": &Parameter{
		Name:      "hba_file",
		Default:   "pg_hba.conf",
		Category:  "File Locations",
		ShortDesc: "Sets the server's \"hba\" configuration file.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemStringType("hba_file"),
		Source:    ParameterSourceOverride,
		ResetVal:  "pg_hba.conf",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"hot_standby": &Parameter{
		Name:      "hot_standby",
		Default:   int8(1),
		Category:  "Replication / Standby Servers",
		ShortDesc: "Allows connections and queries during recovery.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemBoolType("hot_standby"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"hot_standby_feedback": &Parameter{
		Name:      "hot_standby_feedback",
		Default:   int8(0),
		Category:  "Replication / Standby Servers",
		ShortDesc: "Allows feedback from a hot standby to the primary that will avoid query conflicts.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemBoolType("hot_standby_feedback"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"huge_page_size": &Parameter{
		Name:    "huge_page_size",
		Default: int64(0),
		// Unit: "kB",
		Category:  "Resource Usage / Memory",
		ShortDesc: "The size of huge page that should be requested.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemIntType("huge_page_size", 0, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"huge_pages": &Parameter{
		Name:      "huge_pages",
		Default:   "try",
		Category:  "Resource Usage / Memory",
		ShortDesc: "Use of huge pages on Linux or Windows.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemEnumType("huge_pages", "off", "on", "try"),
		Source:    ParameterSourceDefault,
		ResetVal:  "try",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"icu_validation_level": &Parameter{
		Name:      "icu_validation_level",
		Default:   "warning",
		Category:  "Client Connection Defaults / Locale and Formatting",
		ShortDesc: "Log level for reporting invalid ICU locale strings.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemEnumType("icu_validation_level", "disabled", "debug5", "debug4", "debug3", "debug2", "debug1", "log", "notice", "warning", "error"),
		Source:    ParameterSourceDefault,
		ResetVal:  "warning",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"ident_file": &Parameter{
		Name:      "ident_file",
		Default:   "pg_ident.conf",
		Category:  "File Locations",
		ShortDesc: "Sets the server's \"ident\" configuration file.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemStringType("ident_file"),
		Source:    ParameterSourceOverride,
		ResetVal:  "pg_ident.conf",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"idle_in_transaction_session_timeout": &Parameter{
		Name:    "idle_in_transaction_session_timeout",
		Default: int64(0),
		// Unit: "ms",
		Category:  "Client Connection Defaults / Statement Behavior",
		ShortDesc: "Sets the maximum allowed idle time between queries, when in a transaction.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("idle_in_transaction_session_timeout", 0, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"idle_session_timeout": &Parameter{
		Name:    "idle_session_timeout",
		Default: int64(0),
		// Unit: "ms",
		Category:  "Client Connection Defaults / Statement Behavior",
		ShortDesc: "Sets the maximum allowed idle time between queries, when not in a transaction.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("idle_session_timeout", 0, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"ignore_checksum_failure": &Parameter{
		Name:      "ignore_checksum_failure",
		Default:   int8(0),
		Category:  "Developer Options",
		ShortDesc: "Continues processing after a checksum failure.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemBoolType("ignore_checksum_failure"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"ignore_invalid_pages": &Parameter{
		Name:      "ignore_invalid_pages",
		Default:   int8(0),
		Category:  "Developer Options",
		ShortDesc: "Continues recovery after an invalid pages failure.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemBoolType("ignore_invalid_pages"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"ignore_system_indexes": &Parameter{
		Name:      "ignore_system_indexes",
		Default:   int8(0),
		Category:  "Developer Options",
		ShortDesc: "Disables reading from system indexes.",
		Context:   ParameterContextBackend,
		Type:      types.NewSystemBoolType("ignore_system_indexes"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"in_hot_standby": &Parameter{
		Name:      "in_hot_standby",
		Default:   int8(0),
		Category:  "Preset Options",
		ShortDesc: "Shows whether hot standby is currently active.",
		Context:   ParameterContextInternal,
		Type:      types.NewSystemBoolType("in_hot_standby"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"integer_datetimes": &Parameter{
		Name:      "integer_datetimes",
		Default:   int8(1),
		Category:  "Preset Options",
		ShortDesc: "Shows whether datetimes are integer based.",
		Context:   ParameterContextInternal,
		Type:      types.NewSystemBoolType("integer_datetimes"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"intervalstyle": &Parameter{
		Name:      "IntervalStyle",
		Default:   "postgres",
		Category:  "Client Connection Defaults / Locale and Formatting",
		ShortDesc: "Sets the display format for interval values.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemEnumType("intervalstyle", "postgres", "postgres_verbose", "sql_standard", "iso_8601"),
		Source:    ParameterSourceDefault,
		ResetVal:  "postgres",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"jit": &Parameter{
		Name:      "jit",
		Default:   int8(1),
		Category:  "Query Tuning / Other Planner Options",
		ShortDesc: "Allow JIT compilation.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("jit"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"jit_above_cost": &Parameter{
		Name:      "jit_above_cost",
		Default:   float64(100000),
		Category:  "Write-Ahead Log / Archive Recovery",
		ShortDesc: "Sets the shell command that will be executed at every restart point.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemDoubleType("jit_above_cost", -1, math.MaxFloat64),
		Source:    ParameterSourceDefault,
		ResetVal:  float64(100000),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"jit_debugging_support": &Parameter{
		Name:      "jit_debugging_support",
		Default:   int8(0),
		Category:  "Developer Options",
		ShortDesc: "Register JIT-compiled functions with debugger.",
		Context:   ParameterContextSuperUserBackend,
		Type:      types.NewSystemBoolType("jit_debugging_support"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"jit_dump_bitcode": &Parameter{
		Name:      "jit_dump_bitcode",
		Default:   int8(0),
		Category:  "Developer Options",
		ShortDesc: "Write out LLVM bitcode to facilitate JIT debugging.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemBoolType("jit_dump_bitcode"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"jit_expressions": &Parameter{
		Name:      "jit_expressions",
		Default:   int8(1),
		Category:  "Developer Options",
		ShortDesc: "Allow JIT compilation of expressions.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("jit_expressions"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"jit_inline_above_cost": &Parameter{
		Name:      "jit_inline_above_cost",
		Default:   float64(500000),
		Category:  "Query Tuning / Planner Cost Constants",
		ShortDesc: "Perform JIT inlining if query is more expensive.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemDoubleType("jit_inline_above_cost", -1, math.MaxFloat64),
		Source:    ParameterSourceDefault,
		ResetVal:  float64(500000),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"jit_optimize_above_cost": &Parameter{
		Name:      "jit_optimize_above_cost",
		Default:   float64(500000),
		Category:  "Query Tuning / Planner Cost Constants",
		ShortDesc: "Optimize JIT-compiled functions if query is more expensive.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemDoubleType("jit_optimize_above_cost", -1, math.MaxFloat64),
		Source:    ParameterSourceDefault,
		ResetVal:  float64(500000),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"jit_profiling_support": &Parameter{
		Name:      "jit_profiling_support",
		Default:   int8(0),
		Category:  "Developer Options",
		ShortDesc: "Register JIT-compiled functions with perf profiler.",
		Context:   ParameterContextSuperUserBackend,
		Type:      types.NewSystemBoolType("jit_profiling_support"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"jit_provider": &Parameter{
		Name:      "jit_provider",
		Default:   "llvmjit",
		Category:  "Client Connection Defaults / Shared Library Preloading",
		ShortDesc: "JIT provider to use.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemStringType("jit_provider"),
		Source:    ParameterSourceDefault,
		ResetVal:  "llvmjit",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"jit_tuple_deforming": &Parameter{
		Name:      "jit_tuple_deforming",
		Default:   int8(1),
		Category:  "Developer Options",
		ShortDesc: "Allow JIT compilation of tuple deforming.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("jit_tuple_deforming"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"join_collapse_limit": &Parameter{
		Name:      "join_collapse_limit",
		Default:   int64(8),
		Category:  "Query Tuning / Other Planner Options",
		ShortDesc: "Sets the FROM-list size beyond which JOIN constructs are not flattened.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("join_collapse_limit", 1, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(8),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"krb_caseins_users": &Parameter{
		Name:      "krb_caseins_users",
		Default:   int8(0),
		Category:  "Connections and Authentication / Authentication",
		ShortDesc: "Sets whether Kerberos and GSSAPI user names should be treated as case-insensitive.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemBoolType("krb_caseins_users"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"krb_server_keyfile": &Parameter{
		Name:      "krb_server_keyfile",
		Default:   "FILE:/usr/local/etc/postgresql/krb5.keytab",
		Category:  "Connections and Authentication / Authentication",
		ShortDesc: "Sets the location of the Kerberos server key file.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemStringType("krb_server_keyfile"),
		Source:    ParameterSourceDefault,
		ResetVal:  "FILE:/usr/local/etc/postgresql/krb5.keytab",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"lc_messages": &Parameter{
		Name:      "lc_messages",
		Default:   "en_US.UTF-8",
		Category:  "Client Connection Defaults / Locale and Formatting",
		ShortDesc: "Sets the language in which messages are displayed.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemStringType("lc_messages"),
		Source:    ParameterSourceConfigurationFile,
		ResetVal:  "en_US.UTF-8",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"lc_monetary": &Parameter{
		Name:      "lc_monetary",
		Default:   "en_US.UTF-8",
		Category:  "Client Connection Defaults / Locale and Formatting",
		ShortDesc: "Sets the locale for formatting monetary amounts.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemStringType("lc_monetary"),
		Source:    ParameterSourceConfigurationFile,
		// BootVal: "C",
		ResetVal: "en_US.UTF-8",
		Scope:    GetPgsqlScope(PsqlScopeSession),
	},
	"lc_numeric": &Parameter{
		Name:      "lc_numeric",
		Default:   "en_US.UTF-8",
		Category:  "Client Connection Defaults / Locale and Formatting",
		ShortDesc: "Sets the locale for formatting numbers.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemStringType("lc_numeric"),
		Source:    ParameterSourceConfigurationFile,
		// BootVal: "C",
		ResetVal: "en_US.UTF-8",
		Scope:    GetPgsqlScope(PsqlScopeSession),
	},
	"lc_time": &Parameter{
		Name:      "lc_time",
		Default:   "en_US.UTF-8",
		Category:  "Client Connection Defaults / Locale and Formatting",
		ShortDesc: "Sets the locale for formatting date and time values.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemStringType("lc_time"),
		Source:    ParameterSourceConfigurationFile,
		// BootVal: "C",
		ResetVal: "en_US.UTF-8",
		Scope:    GetPgsqlScope(PsqlScopeSession),
	},
	"listen_addresses": &Parameter{
		Name:      "listen_addresses",
		Default:   "localhost",
		Category:  "Connections and Authentication / Connection Settings",
		ShortDesc: "Sets the host name or IP address(es) to listen to.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemStringType("listen_addresses"),
		Source:    ParameterSourceDefault,
		ResetVal:  "localhost",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"lo_compat_privileges": &Parameter{
		Name:      "lo_compat_privileges",
		Default:   int8(0),
		Category:  "Version and Platform Compatibility / Previous PostgreSQL Versions",
		ShortDesc: "Enables backward compatibility mode for privilege checks on large objects.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemBoolType("lo_compat_privileges"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"local_preload_libraries": &Parameter{
		Name:      "local_preload_libraries",
		Default:   "",
		Category:  "Client Connection Defaults / Shared Library Preloading",
		ShortDesc: "Lists unprivileged shared libraries to preload into each backend.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemStringType("local_preload_libraries"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"lock_timeout": &Parameter{
		Name:    "lock_timeout",
		Default: int64(0),
		// Unit: "ms",
		Category:  "Client Connection Defaults / Statement Behavior",
		ShortDesc: "Sets the maximum allowed duration of any wait for a lock.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("lock_timeout", 0, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_autovacuum_min_duration": &Parameter{
		Name:      "log_autovacuum_min_duration",
		Default:   int64(-1),
		Category:  "Reporting and Logging / What to Log",
		ShortDesc: "Sets the minimum execution time above which autovacuum actions will be logged.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("log_autovacuum_min_duration", -1, math.MaxInt32, true),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(-1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_checkpoints": &Parameter{
		Name:      "log_checkpoints",
		Default:   int8(1),
		Category:  "Reporting and Logging / What to Log",
		ShortDesc: "Logs each checkpoint.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemBoolType("log_checkpoints"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_connections": &Parameter{
		Name:      "log_connections",
		Default:   int8(0),
		Category:  "Reporting and Logging / What to Log",
		ShortDesc: "Logs each successful connection.",
		Context:   ParameterContextSuperUserBackend,
		Type:      types.NewSystemBoolType("log_connections"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_destination": &Parameter{
		Name:      "log_destination",
		Default:   "stderr",
		Category:  "Reporting and Logging / Where to Log",
		ShortDesc: "Sets the destination for server log output.",
		// LongDesc: "Valid values are combinations of "stderr", "syslog", "csvlog", "jsonlog", and "eventlog", depending on the platform.",
		Context:  ParameterContextSighup,
		Type:     types.NewSystemStringType("log_destination"),
		Source:   ParameterSourceDefault,
		ResetVal: "stderr",
		Scope:    GetPgsqlScope(PsqlScopeSession),
	},
	"log_directory": &Parameter{
		Name:      "log_directory",
		Default:   "log",
		Category:  "Reporting and Logging / Where to Log",
		ShortDesc: "Sets the destination directory for log files.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemStringType("log_directory"),
		Source:    ParameterSourceDefault,
		ResetVal:  "log",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_disconnections": &Parameter{
		Name:      "log_disconnections",
		Default:   int8(0),
		Category:  "Reporting and Logging / What to Log",
		ShortDesc: "Logs end of a session, including duration.",
		Context:   ParameterContextSuperUserBackend,
		Type:      types.NewSystemBoolType("log_disconnections"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_duration": &Parameter{
		Name:      "log_duration",
		Default:   int8(0),
		Category:  "Reporting and Logging / What to Log",
		ShortDesc: "Logs the duration of each completed SQL statement.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemBoolType("log_duration"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_error_verbosity": &Parameter{
		Name:      "log_error_verbosity",
		Default:   "default",
		Category:  "Reporting and Logging / What to Log",
		ShortDesc: "Sets the verbosity of logged messages.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemEnumType("log_error_verbosity", "terse", "default", "verbose"),
		Source:    ParameterSourceDefault,
		ResetVal:  "default",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_executor_stats": &Parameter{
		Name:      "log_executor_stats",
		Default:   int8(0),
		Category:  "Statistics / Monitoring",
		ShortDesc: "Writes executor performance statistics to the server log.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemBoolType("log_executor_stats"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_file_mode": &Parameter{
		Name:      "log_file_mode",
		Default:   int64(384), // displays in octal, which is 0600
		Category:  "Reporting and Logging / Where to Log",
		ShortDesc: "Sets the file permissions for log files.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("log_file_mode", 0, 511, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(384),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_filename": &Parameter{
		Name:      "log_filename",
		Default:   "postgresql-%Y-%m-%d_%H%M%S.log",
		Category:  "Reporting and Logging / Where to Log",
		ShortDesc: "Sets the file name pattern for log files.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemStringType("log_filename"),
		Source:    ParameterSourceDefault,
		ResetVal:  "postgresql-%Y-%m-%d_%H%M%S.log",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_hostname": &Parameter{
		Name:      "log_hostname",
		Default:   int8(0),
		Category:  "Reporting and Logging / What to Log",
		ShortDesc: "Logs the host name in the connection logs.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemBoolType("log_hostname"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_line_prefix": &Parameter{
		Name:      "log_line_prefix",
		Default:   "%m [%p]",
		Category:  "Reporting and Logging / What to Log",
		ShortDesc: "Controls information prefixed to each log line.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemStringType("log_line_prefix"),
		Source:    ParameterSourceDefault,
		ResetVal:  "%m [%p]",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_lock_waits": &Parameter{
		Name:      "log_lock_waits",
		Default:   int8(0),
		Category:  "Reporting and Logging / What to Log",
		ShortDesc: "Logs long lock waits.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemBoolType("log_lock_waits"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_min_duration_sample": &Parameter{
		Name:    "log_min_duration_sample",
		Default: int64(-1),
		// Unit: "ms",
		Category:  "Reporting and Logging / When to Log",
		ShortDesc: "Sets the minimum execution time above which a sample of statements will be logged. Sampling is determined by log_statement_sample_rate.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemIntType("log_min_duration_sample", -1, math.MaxInt32, true),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(-1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_min_duration_statement": &Parameter{
		Name:    "log_min_duration_statement",
		Default: int64(-1),
		// Unit: "ms",
		Category:  "Reporting and Logging / When to Log",
		ShortDesc: "Sets the minimum execution time above which all statements will be logged.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemIntType("log_min_duration_statement", -1, math.MaxInt32, true),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(-1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_min_error_statement": &Parameter{
		Name:      "log_min_error_statement",
		Default:   "error",
		Category:  "Reporting and Logging / When to Log",
		ShortDesc: "Causes all statements generating error at or above this level to be logged.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemEnumType("log_min_error_statement", "debug5", "debug4", "debug3", "debug2", "debug1", "info", "notice", "warning", "error", "log", "fatal", "panic"),
		Source:    ParameterSourceDefault,
		ResetVal:  "error",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_min_messages": &Parameter{
		Name:      "log_min_messages",
		Default:   "warning",
		Category:  "Reporting and Logging / When to Log",
		ShortDesc: "Sets the message levels that are logged.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemEnumType("log_min_messages", "debug5", "debug4", "debug3", "debug2", "debug1", "info", "notice", "warning", "error", "log", "fatal", "panic"),
		Source:    ParameterSourceDefault,
		ResetVal:  "warning",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_parameter_max_length": &Parameter{
		Name:    "log_parameter_max_length",
		Default: int64(-1),
		// Unit: "B",
		Category:  "Reporting and Logging / What to Log",
		ShortDesc: "Sets the maximum length in bytes of data logged for bind parameter values when logging statements.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemIntType("log_parameter_max_length", -1, 1073741823, true),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(-1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_parameter_max_length_on_error": &Parameter{
		Name:    "log_parameter_max_length_on_error",
		Default: int64(0),
		// Unit: "B",
		Category:  "Reporting and Logging / What to Log",
		ShortDesc: "Sets the maximum length in bytes of data logged for bind parameter values when logging statements, on error.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("log_parameter_max_length_on_error", -1, 1073741823, true),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_parser_stats": &Parameter{
		Name:      "log_parser_stats",
		Default:   int8(0),
		Category:  "Statistics / Monitoring",
		ShortDesc: "Writes parser performance statistics to the server log.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemBoolType("log_parser_stats"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_planner_stats": &Parameter{
		Name:      "log_planner_stats",
		Default:   int8(0),
		Category:  "Statistics / Monitoring",
		ShortDesc: "Writes planner performance statistics to the server log.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemBoolType("log_planner_stats"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_recovery_conflict_waits": &Parameter{
		Name:      "log_recovery_conflict_waits",
		Default:   int8(0),
		Category:  "Reporting and Logging / What to Log",
		ShortDesc: "Logs standby recovery conflict waits.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemBoolType("log_recovery_conflict_waits"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_replication_commands": &Parameter{
		Name:      "log_replication_commands",
		Default:   int8(0),
		Category:  "Reporting and Logging / What to Log",
		ShortDesc: "Logs each replication command.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemBoolType("log_replication_commands"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_rotation_age": &Parameter{
		Name:    "log_rotation_age",
		Default: int64(1440),
		// Unit: "min",
		Category:  "Reporting and Logging / Where to Log",
		ShortDesc: "Sets the amount of time to wait before forcing log file rotation.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("log_rotation_age", 0, 35791394, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(1440),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_rotation_size": &Parameter{
		Name:    "log_rotation_size",
		Default: int64(10240),
		// Unit: "kB",
		Category:  "Reporting and Logging / Where to Log",
		ShortDesc: "Sets the maximum size a log file can reach before being rotated.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("log_rotation_size", 0, 2097151, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(10240),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_startup_progress_interval": &Parameter{
		Name:      "log_startup_progress_interval",
		Default:   int64(10000),
		Category:  "Reporting and Logging / When to Log",
		ShortDesc: "Time between progress updates for long-running startup operations.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("log_startup_progress_interval", 1, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(10000),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_statement": &Parameter{
		Name:      "log_statement",
		Default:   "none",
		Category:  "Reporting and Logging / When to Log",
		ShortDesc: "Sets the type of statements logged.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemEnumType("log_statement", "none", "ddl", "mod", "all"),
		Source:    ParameterSourceDefault,
		ResetVal:  "none",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_statement_sample_rate": &Parameter{
		Name:      "log_statement_sample_rate",
		Default:   float64(1),
		Category:  "Reporting and Logging / When to Log",
		ShortDesc: "Fraction of statements exceeding log_min_duration_sample to be logged.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemDoubleType("log_statement_sample_rate", 0, 1),
		Source:    ParameterSourceDefault,
		ResetVal:  float64(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_statement_stats": &Parameter{
		Name:      "log_statement_stats",
		Default:   int8(0),
		Category:  "Statistics / Monitoring",
		ShortDesc: "Writes cumulative performance statistics to the server log.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemBoolType("log_statement_stats"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_temp_files": &Parameter{
		Name:    "log_temp_files",
		Default: int64(-1),
		// Unit: "kB",
		Category:  "Reporting and Logging / What to Log",
		ShortDesc: "Log the use of temporary files larger than this number of kilobytes.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemIntType("log_temp_files", -1, math.MaxInt32, true),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(-1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_timezone": &Parameter{
		Name:      "log_timezone",
		Default:   "America/Los_Angeles",
		Category:  "Reporting and Logging / What to Log",
		ShortDesc: "Sets the time zone to use in log messages.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemStringType("log_timezone"),
		Source:    ParameterSourceConfigurationFile,
		// BootVal: "GMT",
		ResetVal: "America/Los_Angeles",
		Scope:    GetPgsqlScope(PsqlScopeSession),
	},
	"log_transaction_sample_rate": &Parameter{
		Name:      "log_transaction_sample_rate",
		Default:   float64(0),
		Category:  "Reporting and Logging / When to Log",
		ShortDesc: "Sets the fraction of transactions from which to log all statements.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemDoubleType("log_transaction_sample_rate", 0, 1),
		Source:    ParameterSourceDefault,
		ResetVal:  float64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"log_truncate_on_rotation": &Parameter{
		Name:      "log_truncate_on_rotation",
		Default:   int8(0),
		Category:  "Reporting and Logging / Where to Log",
		ShortDesc: "Truncate existing log files of same name during log rotation.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemBoolType("log_truncate_on_rotation"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"logging_collector": &Parameter{
		Name:      "logging_collector",
		Default:   int8(0),
		Category:  "Reporting and Logging / Where to Log",
		ShortDesc: "Start a subprocess to capture stderr output and/or csvlogs into log files.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemBoolType("logging_collector"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"logical_decoding_work_mem": &Parameter{
		Name:    "logical_decoding_work_mem",
		Default: int64(65536),
		// Unit: "kB",
		Category:  "Resource Usage / Memory",
		ShortDesc: "Sets the maximum memory to be used for logical decoding.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("logical_decoding_work_mem", 64, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(65536),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"maintenance_io_concurrency": &Parameter{
		Name:      "maintenance_io_concurrency",
		Default:   int64(0),
		Category:  "Resource Usage / Asynchronous Behavior",
		ShortDesc: "A variant of effective_io_concurrency that is used for maintenance work.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("maintenance_io_concurrency", 0, 1000, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"maintenance_work_mem": &Parameter{
		Name:    "maintenance_work_mem",
		Default: int64(65536),
		// Unit: "kB",
		Category:  "Resource Usage / Memory",
		ShortDesc: "Sets the maximum memory to be used for maintenance operations.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("maintenance_work_mem", 1024, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(65536),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"max_connections": &Parameter{
		Name:      "max_connections",
		Default:   int64(100),
		Category:  "Connections and Authentication / Connection Settings",
		ShortDesc: "Sets the maximum number of concurrent connections.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemIntType("max_connections", 64, math.MaxInt32, false),
		Source:    ParameterSourceConfigurationFile,
		ResetVal:  int64(100),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"max_files_per_process": &Parameter{
		Name:      "max_files_per_process",
		Default:   int64(1000),
		Category:  "Resource Usage / Kernel Resources",
		ShortDesc: "Sets the maximum number of simultaneously open files for each server process.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemIntType("max_files_per_process", 64, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(1000),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"max_function_args": &Parameter{
		Name:      "max_function_args",
		Default:   int64(100),
		Category:  "Preset Options",
		ShortDesc: "Shows the maximum number of function arguments.",
		Context:   ParameterContextInternal,
		Type:      types.NewSystemIntType("max_function_args", 100, 100, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(100),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"max_identifier_length": &Parameter{
		Name:      "max_identifier_length",
		Default:   int64(63),
		Category:  "Preset Options",
		ShortDesc: "Shows the maximum identifier length.",
		Context:   ParameterContextInternal,
		Type:      types.NewSystemIntType("max_identifier_length", 63, 63, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(63),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"max_index_keys": &Parameter{
		Name:      "max_index_keys",
		Default:   int64(32),
		Category:  "Preset Options",
		ShortDesc: "Shows the maximum number of index keys.",
		Context:   ParameterContextInternal,
		Type:      types.NewSystemIntType("max_index_keys", 32, 32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(32),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"max_locks_per_transaction": &Parameter{
		Name:      "max_locks_per_transaction",
		Default:   int64(64),
		Category:  "Lock Management",
		ShortDesc: "Sets the maximum number of locks per transaction.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemIntType("max_locks_per_transaction", 10, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(64),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"max_logical_replication_workers": &Parameter{
		Name:      "max_logical_replication_workers",
		Default:   int64(4),
		Category:  "Replication / Subscribers",
		ShortDesc: "Maximum number of logical replication worker processes.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemIntType("max_logical_replication_workers", 0, 262143, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(4),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"max_parallel_apply_workers_per_subscription": &Parameter{
		Name:      "max_parallel_apply_workers_per_subscription",
		Default:   int64(2),
		Category:  "Replication / Subscribers",
		ShortDesc: "Maximum number of parallel apply workers per subscription.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("max_parallel_apply_workers_per_subscription", 0, 1024, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(2),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"max_parallel_maintenance_workers": &Parameter{
		Name:      "max_parallel_maintenance_workers",
		Default:   int64(2),
		Category:  "Resource Usage / Asynchronous Behavior",
		ShortDesc: "Sets the maximum number of parallel processes per maintenance operation.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("max_parallel_maintenance_workers", 0, 1024, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(2),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"max_parallel_workers": &Parameter{
		Name:      "max_parallel_workers",
		Default:   int64(8),
		Category:  "Resource Usage / Asynchronous Behavior",
		ShortDesc: "Sets the maximum number of parallel workers that can be active at one time.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("max_parallel_workers", 0, 1024, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(8),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"max_parallel_workers_per_gather": &Parameter{
		Name:      "max_parallel_workers_per_gather",
		Default:   int64(2),
		Category:  "Resource Usage / Asynchronous Behavior",
		ShortDesc: "Sets the maximum number of parallel processes per executor node.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("max_parallel_workers_per_gather", 0, 1024, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(2),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"max_pred_locks_per_page": &Parameter{
		Name:      "max_pred_locks_per_page",
		Default:   int64(2),
		Category:  "Lock Management",
		ShortDesc: "Sets the maximum number of predicate-locked tuples per page.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("max_pred_locks_per_page", 0, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(2),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"max_pred_locks_per_relation": &Parameter{
		Name:      "max_pred_locks_per_relation",
		Default:   int64(-2),
		Category:  "Lock Management",
		ShortDesc: "Sets the maximum number of predicate-locked pages and tuples per relation.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("max_pred_locks_per_relation", math.MinInt32, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(-2),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"max_pred_locks_per_transaction": &Parameter{
		Name:      "max_pred_locks_per_transaction",
		Default:   int64(64),
		Category:  "Lock Management",
		ShortDesc: "Sets the maximum number of predicate locks per transaction.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemIntType("max_pred_locks_per_transaction", 10, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(64),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"max_prepared_transactions": &Parameter{
		Name:      "max_prepared_transactions",
		Default:   int64(0),
		Category:  "Resource Usage / Memory",
		ShortDesc: "Sets the maximum number of simultaneously prepared transactions.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemIntType("max_prepared_transactions", 0, 262143, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"max_replication_slots": &Parameter{
		Name:      "max_replication_slots",
		Default:   int64(10),
		Category:  "Replication / Sending Servers",
		ShortDesc: "Sets the maximum number of simultaneously defined replication slots.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemIntType("max_replication_slots", 0, 262143, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(10),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"max_slot_wal_keep_size": &Parameter{
		Name:    "max_slot_wal_keep_size",
		Default: int64(-1),
		// Unit: "MB",
		Category:  "Replication / Sending Servers",
		ShortDesc: "Sets the maximum WAL size that can be reserved by replication slots.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("max_slot_wal_keep_size", -1, math.MaxInt32, true),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(-1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"max_stack_depth": &Parameter{
		Name:    "max_stack_depth",
		Default: int64(2048),
		// Unit: "kB",
		Category:  "Resource Usage / Memory",
		ShortDesc: "Sets the maximum stack depth, in kilobytes.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemIntType("max_stack_depth", 100, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(2048),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"max_standby_archive_delay": &Parameter{
		Name:    "max_standby_archive_delay",
		Default: int64(30000),
		// Unit: "ms",
		Category:  "Replication / Sending Servers",
		ShortDesc: "Sets the maximum delay before canceling queries when a hot standby server is processing archived WAL data.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("max_standby_archive_delay", -1, math.MaxInt32, true),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(30000),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"max_standby_streaming_delay": &Parameter{
		Name:    "max_standby_streaming_delay",
		Default: int64(30000),
		// Unit: "ms",
		Category:  "Replication / Standby Servers",
		ShortDesc: "Sets the maximum delay before canceling queries when a hot standby server is processing streamed WAL data.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("max_standby_streaming_delay", -1, math.MaxInt32, true),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(30000),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"max_sync_workers_per_subscription": &Parameter{
		Name:      "max_sync_workers_per_subscription",
		Default:   int64(2),
		Category:  "Replication / Subscribers",
		ShortDesc: "Maximum number of table synchronization workers per subscription.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("max_sync_workers_per_subscription", 0, 262143, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(2),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"max_wal_senders": &Parameter{
		Name:      "max_wal_senders",
		Default:   int64(10),
		Category:  "Replication / Sending Servers",
		ShortDesc: "Sets the maximum number of simultaneously running WAL sender processes.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemIntType("max_wal_senders", 0, 262143, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(10),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"max_wal_size": &Parameter{
		Name:    "max_wal_size",
		Default: int64(1024),
		// Unit: "MB",
		Category:  "Write-Ahead Log / Checkpoints",
		ShortDesc: "Sets the WAL size that triggers a checkpoint.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("max_wal_size", 2, math.MaxInt32, false),
		Source:    ParameterSourceConfigurationFile,
		ResetVal:  int64(1024),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"max_worker_processes": &Parameter{
		Name:      "max_worker_processes",
		Default:   int64(8),
		Category:  "Resource Usage / Asynchronous Behavior",
		ShortDesc: "Maximum number of concurrent worker processes.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemIntType("max_worker_processes", 0, 262143, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(8),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"min_dynamic_shared_memory": &Parameter{
		Name:      "min_dynamic_shared_memory",
		Default:   int64(0),
		Category:  "Resource Usage / Memory",
		ShortDesc: "Amount of dynamic shared memory reserved at startup.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemIntType("min_dynamic_shared_memory", 0, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"min_parallel_index_scan_size": &Parameter{
		Name:    "min_parallel_index_scan_size",
		Default: int64(1024),
		// Unit: "8kB",
		Category:  "Query Tuning / Planner Cost Constants",
		ShortDesc: "Sets the minimum amount of table data for a parallel scan.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("min_parallel_index_scan_size", 0, 715827882, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(1024),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"min_parallel_table_scan_size": &Parameter{
		Name:    "min_parallel_table_scan_size",
		Default: int64(1024),
		// Unit: "8kB",
		Category:  "Query Tuning / Planner Cost Constants",
		ShortDesc: "Sets the minimum amount of table data for a parallel scan.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("min_parallel_table_scan_size", 0, 715827882, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(1024),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"min_wal_size": &Parameter{
		Name:    "min_wal_size",
		Default: int64(80),
		// Unit: "MB",
		Category:  "Write-Ahead Log / Checkpoints",
		ShortDesc: "Sets the minimum size to shrink the WAL to.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("min_wal_size", 2, math.MaxInt32, false),
		Source:    ParameterSourceConfigurationFile,
		ResetVal:  int64(80),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"old_snapshot_threshold": &Parameter{
		Name:      "old_snapshot_threshold",
		Default:   int64(-1),
		Category:  "Resource Usage / Asynchronous Behavior",
		ShortDesc: "Time before a snapshot is too old to read pages changed after the snapshot was taken.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemIntType("old_snapshot_threshold", -1, 86400, true),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(-1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"parallel_leader_participation": &Parameter{
		Name:      "parallel_leader_participation",
		Default:   int8(1),
		Category:  "Resource Usage / Asynchronous Behavior",
		ShortDesc: "Controls whether Gather and Gather Merge also run subplans.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("parallel_leader_participation"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"parallel_setup_cost": &Parameter{
		Name:      "parallel_setup_cost",
		Default:   float64(1000),
		Category:  "Query Tuning / Planner Cost Constants",
		ShortDesc: "Sets the planner's estimate of the cost of starting up worker processes for parallel query.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemDoubleType("parallel_setup_cost", 0, math.MaxFloat64),
		Source:    ParameterSourceDefault,
		ResetVal:  float64(1000),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"parallel_tuple_cost": &Parameter{
		Name:      "parallel_tuple_cost",
		Default:   float64(0.1),
		Category:  "Query Tuning / Planner Cost Constants",
		ShortDesc: "Sets the planner's estimate of the cost of passing each tuple (row) from worker to leader backend.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemDoubleType("parallel_tuple_cost", 0, math.MaxFloat64),
		Source:    ParameterSourceDefault,
		ResetVal:  float64(0.1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"password_encryption": &Parameter{
		Name:      "password_encryption",
		Default:   "scram-sha-256",
		Category:  "Connections and Authentication / Authentication",
		ShortDesc: "Chooses the algorithm for encrypting passwords.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemEnumType("password_encryption", "md5", "scram-sha-256"),
		Source:    ParameterSourceDefault,
		ResetVal:  "scram-sha-256",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"plan_cache_mode": &Parameter{
		Name:      "plan_cache_mode",
		Default:   "auto",
		Category:  "Query Tuning / Other Planner Options",
		ShortDesc: "Controls the planner's selection of custom or generic plan.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemEnumType("plan_cache_mode", "auto", "force_generic_plan", "force_custom_plan"),
		Source:    ParameterSourceDefault,
		ResetVal:  "auto",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"port": &Parameter{
		Name:      "port",
		Default:   int64(5432),
		Category:  "Connections and Authentication / Connection Settings",
		ShortDesc: "Sets the TCP port the server listens on.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemIntType("port", 1, 65535, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(5432),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"post_auth_delay": &Parameter{
		Name:    "post_auth_delay",
		Default: int64(0),
		// Unit: "s",
		Category:  "Developer Options",
		ShortDesc: "Sets the amount of time to wait after authentication on connection startup.",
		Context:   ParameterContextBackend,
		Type:      types.NewSystemIntType("post_auth_delay", 0, 2147, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"pre_auth_delay": &Parameter{
		Name:    "pre_auth_delay",
		Default: int64(0),
		// Unit: "s",
		Category:  "Developer Options",
		ShortDesc: "Sets the amount of time to wait before authentication on connection startup.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("pre_auth_delay", 0, 60, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"primary_conninfo": &Parameter{
		Name:      "primary_conninfo",
		Default:   "",
		Category:  "Replication / Standby Servers",
		ShortDesc: "Sets the connection string to be used to connect to the sending server.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemStringType("primary_conninfo"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"primary_slot_name": &Parameter{
		Name:      "primary_slot_name",
		Default:   "",
		Category:  "Replication / Standby Servers",
		ShortDesc: "Sets the name of the replication slot to use on the sending server.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemStringType("primary_slot_name"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"quote_all_identifiers": &Parameter{
		Name:      "quote_all_identifiers",
		Default:   int8(0),
		Category:  "Version and Platform Compatibility / Previous PostgreSQL Versions",
		ShortDesc: "When generating SQL fragments, quote all identifiers.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("quote_all_identifiers"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"random_page_cost": &Parameter{
		Name:      "random_page_cost",
		Default:   float64(4),
		Category:  "Query Tuning / Planner Cost Constants",
		ShortDesc: "Sets the planner's estimate of the cost of a nonsequentially fetched disk page.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemDoubleType("random_page_cost", 0, math.MaxFloat64),
		Source:    ParameterSourceDefault,
		ResetVal:  float64(4),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"recovery_end_command": &Parameter{
		Name:      "recovery_end_command",
		Default:   "",
		Category:  "Write-Ahead Log / Archive Recovery",
		ShortDesc: "Sets the shell command that will be executed once at the end of recovery.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemStringType("recovery_end_command"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"recovery_init_sync_method": &Parameter{
		Name:      "recovery_init_sync_method",
		Default:   "fsync",
		Category:  "Error Handling",
		ShortDesc: "Sets the method for synchronizing the data directory before crash recovery.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemEnumType("recovery_init_sync_method", "fsync"),
		Source:    ParameterSourceDefault,
		ResetVal:  "fsync",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"recovery_min_apply_delay": &Parameter{
		Name:    "recovery_min_apply_delay",
		Default: int64(0),
		// Unit: "ms",
		Category:  "Replication / Standby Servers",
		ShortDesc: "Sets the minimum delay for applying changes during recovery.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("recovery_min_apply_delay", 0, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"recovery_prefetch": &Parameter{
		Name:      "recovery_prefetch",
		Default:   "try",
		Category:  "Write-Ahead Log / Recovery",
		ShortDesc: "Prefetch referenced blocks during recovery.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemEnumType("recovery_prefetch", "off", "on", "try"),
		Source:    ParameterSourceDefault,
		ResetVal:  "try",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"recovery_target": &Parameter{
		Name:      "recovery_target",
		Default:   "",
		Category:  "Write-Ahead Log / Recovery Target",
		ShortDesc: "Set to \"immediate\" to end recovery as soon as a consistent state is reached.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemStringType("recovery_target"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"recovery_target_action": &Parameter{
		Name:      "recovery_target_action",
		Default:   "pause",
		Category:  "Write-Ahead Log / Recovery Target",
		ShortDesc: "Sets the action to perform upon reaching the recovery target.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemEnumType("recovery_target_action", "pause", "promote", "shutdown"),
		Source:    ParameterSourceDefault,
		ResetVal:  "pause",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"recovery_target_inclusive": &Parameter{
		Name:      "recovery_target_inclusive",
		Default:   int8(1),
		Category:  "Write-Ahead Log / Recovery Target",
		ShortDesc: "Sets whether to include or exclude transaction with recovery target.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemBoolType("recovery_target_inclusive"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"recovery_target_lsn": &Parameter{
		Name:      "recovery_target_lsn",
		Default:   "",
		Category:  "Write-Ahead Log / Recovery Target",
		ShortDesc: "Sets the LSN of the write-ahead log location up to which recovery will proceed.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemStringType("recovery_target_lsn"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"recovery_target_name": &Parameter{
		Name:      "recovery_target_name",
		Default:   "",
		Category:  "Write-Ahead Log / Recovery Target",
		ShortDesc: "Sets the named restore point up to which recovery will proceed.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemStringType("recovery_target_name"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"recovery_target_time": &Parameter{
		Name:      "recovery_target_time",
		Default:   "",
		Category:  "Write-Ahead Log / Recovery Target",
		ShortDesc: "Sets the time stamp up to which recovery will proceed.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemStringType("recovery_target_time"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"recovery_target_timeline": &Parameter{
		Name:      "recovery_target_timeline",
		Default:   "latest",
		Category:  "Write-Ahead Log / Recovery Target",
		ShortDesc: "Specifies the timeline to recover into.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemStringType("recovery_target_timeline"),
		Source:    ParameterSourceDefault,
		ResetVal:  "latest",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"recovery_target_xid": &Parameter{
		Name:      "recovery_target_xid",
		Default:   "",
		Category:  "Write-Ahead Log / Recovery Target",
		ShortDesc: "Sets the transaction ID up to which recovery will proceed.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemStringType("recovery_target_xid"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"recursive_worktable_factor": &Parameter{
		Name:      "recursive_worktable_factor",
		Default:   float64(10),
		Category:  "Query Tuning / Other Planner Options",
		ShortDesc: "Sets the planner's estimate of the average size of a recursive query's working table.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemDoubleType("recursive_worktable_factor", 0.001, 1000000),
		Source:    ParameterSourceDefault,
		ResetVal:  float64(10),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"remove_temp_files_after_crash": &Parameter{
		Name:      "remove_temp_files_after_crash",
		Default:   int8(0),
		Category:  "Developer Options",
		ShortDesc: "Remove temporary files after backend crash.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemBoolType("remove_temp_files_after_crash"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"reserved_connections": &Parameter{
		Name:      "reserved_connections",
		Default:   int64(0),
		Category:  "Connections and Authentication / Connection Settings",
		ShortDesc: "Sets the number of connection slots reserved for roles with privileges of pg_use_reserved_connections.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemIntType("reserved_connections", 0, 262143, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"restart_after_crash": &Parameter{
		Name:      "restart_after_crash",
		Default:   int8(1),
		Category:  "Error Handling",
		ShortDesc: "Reinitialize server after backend crash.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemBoolType("restart_after_crash"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"restore_command": &Parameter{
		Name:      "restore_command",
		Default:   "",
		Category:  "Write-Ahead Log / Archive Recovery",
		ShortDesc: "Sets the shell command that will be called to retrieve an archived WAL file.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemStringType("restore_command"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"row_security": &Parameter{
		Name:      "row_security",
		Default:   int8(1),
		Category:  "Client Connection Defaults / Statement Behavior",
		ShortDesc: "Enable row security.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("row_security"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"scram_iterations": &Parameter{
		Name:      "scram_iterations",
		Default:   int64(4096),
		Category:  "Connections and Authentication / Authentication",
		ShortDesc: "Sets the iteration count for SCRAM secret generation.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("scram_iterations", 1, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(4096),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	// search_path has a hack currently: user-space dolt tables are stored with no schema, so to find them on the search
	// path we need an empty schema path element. Instead, we should store them in the `dolt` schema and put the `dolt`
	// schema on the path here.
	"search_path": &Parameter{
		Name:      "search_path",
		Default:   "\"$user\", public,",
		Category:  "Client Connection Defaults / Statement Behavior",
		ShortDesc: "Sets the schema search order for names that are not schema-qualified.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemStringType("search_path"),
		Source:    ParameterSourceDefault,
		ResetVal:  "\"$user\", public",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"segment_size": &Parameter{
		Name:    "segment_size",
		Default: int64(131072),
		// Unit: "8kB",
		Category:  "Preset Options",
		ShortDesc: "Shows the number of pages per disk file.",
		Context:   ParameterContextInternal,
		Type:      types.NewSystemIntType("segment_size", 131072, 131072, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(131072),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"send_abort_for_crash": &Parameter{
		Name:      "send_abort_for_crash",
		Default:   int8(0),
		Category:  "Developer Options",
		ShortDesc: "Send SIGABRT not SIGQUIT to child processes after backend crash.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemBoolType("send_abort_for_crash"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"send_abort_for_kill": &Parameter{
		Name:      "send_abort_for_kill",
		Default:   int8(0),
		Category:  "Developer Options",
		ShortDesc: "Send SIGABRT not SIGKILL to stuck child processes.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemBoolType("send_abort_for_kill"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"seq_page_cost": &Parameter{
		Name:      "seq_page_cost",
		Default:   float64(1),
		Category:  "Query Tuning / Planner Cost Constants",
		ShortDesc: "Sets the planner's estimate of the cost of a sequentially fetched disk page.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemDoubleType("seq_page_cost", 0, math.MaxFloat64),
		Source:    ParameterSourceDefault,
		ResetVal:  float64(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"server_encoding": &Parameter{
		Name:      "server_encoding",
		Default:   "UTF8",
		Category:  "Preset Options",
		ShortDesc: "Shows the server (database) character set encoding.",
		Context:   ParameterContextInternal,
		Type:      types.NewSystemStringType("server_encoding"),
		Source:    ParameterSourceDefault,
		// BootVal: "SQL_ASCII",
		ResetVal: "UTF8",
		Scope:    GetPgsqlScope(PsqlScopeSession),
	},
	"server_version": &Parameter{
		Name:      "server_version",
		Default:   "16.1 (Homebrew)",
		Category:  "Preset Options",
		ShortDesc: "Shows the server version.",
		Context:   ParameterContextInternal,
		Type:      types.NewSystemStringType("server_version"),
		Source:    ParameterSourceDefault,
		ResetVal:  "16.1 (Homebrew)",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"server_version_num": &Parameter{
		Name:      "server_version_num",
		Default:   int64(160001),
		Category:  "Preset Options",
		ShortDesc: "Shows the server version as an integer.",
		Context:   ParameterContextInternal,
		Type:      types.NewSystemIntType("server_version_num", 160001, 160001, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(160001),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"session_preload_libraries": &Parameter{
		Name:      "session_preload_libraries",
		Default:   "",
		Category:  "Client Connection Defaults / Shared Library Preloading",
		ShortDesc: "Lists shared libraries to preload into each backend.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemStringType("session_preload_libraries"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"session_replication_role": &Parameter{
		Name:      "session_replication_role",
		Default:   "origin",
		Category:  "Write-Ahead Log / Archive Recovery",
		ShortDesc: "Sets the session's behavior for triggers and rewrite rules.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemEnumType("session_replication_role", "origin", "replica", "local"),
		Source:    ParameterSourceDefault,
		ResetVal:  "origin",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"shared_buffers": &Parameter{
		Name:    "shared_buffers",
		Default: int64(16384),
		// Unit: "8kB",
		Category:  "Resource Usage / Memory",
		ShortDesc: "Sets the number of shared memory buffers used by the server.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemIntType("shared_buffers", 16, 1073741823, false),
		Source:    ParameterSourceConfigurationFile,
		ResetVal:  int64(16384),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"shared_memory_size": &Parameter{
		Name:    "shared_memory_size",
		Default: int64(143),
		// Unit: "MB",
		Category:  "Preset Options",
		ShortDesc: "Shows the size of the server's main shared memory area (rounded up to the nearest MB).",
		Context:   ParameterContextInternal,
		Type:      types.NewSystemIntType("shared_memory_size", 0, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		// BootVal: int64(0);
		ResetVal: int64(143),
		Scope:    GetPgsqlScope(PsqlScopeSession),
	},
	"shared_memory_size_in_huge_pages": &Parameter{
		Name:      "shared_memory_size_in_huge_pages",
		Default:   int64(-1),
		Category:  "Preset Options",
		ShortDesc: "Shows the number of huge pages needed for the main shared memory area.",
		Context:   ParameterContextInternal,
		Type:      types.NewSystemIntType("shared_memory_size_in_huge_pages", -1, math.MaxInt32, true),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(-1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"shared_memory_type": &Parameter{
		Name:      "shared_memory_type",
		Default:   "mmap",
		Category:  "Resource Usage / Memory",
		ShortDesc: "Selects the shared memory implementation used for the main shared memory region.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemEnumType("shared_memory_type", "sysv", "mmap"),
		Source:    ParameterSourceDefault,
		ResetVal:  "mmap",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"shared_preload_libraries": &Parameter{
		Name:      "shared_preload_libraries",
		Default:   "",
		Category:  "Client Connection Defaults / Shared Library Preloading",
		ShortDesc: "Lists shared libraries to preload into server.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemStringType("shared_preload_libraries"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"ssl": &Parameter{
		Name:      "ssl",
		Default:   int8(0),
		Category:  "Connections and Authentication / SSL",
		ShortDesc: "Enables SSL connections.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemBoolType("ssl"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"ssl_ca_file": &Parameter{
		Name:      "ssl_ca_file",
		Default:   "",
		Category:  "Connections and Authentication / SSL",
		ShortDesc: "Location of the SSL certificate authority file.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemStringType("ssl_ca_file"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"ssl_cert_file": &Parameter{
		Name:      "ssl_cert_file",
		Default:   "server.crt",
		Category:  "Connections and Authentication / SSL",
		ShortDesc: "Location of the SSL server certificate file.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemStringType("ssl_cert_file"),
		Source:    ParameterSourceDefault,
		ResetVal:  "server.crt",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"ssl_ciphers": &Parameter{
		Name:      "ssl_ciphers",
		Default:   "HIGH:MEDIUM:+3DES:!aNULL",
		Category:  "Connections and Authentication / SSL",
		ShortDesc: "Sets the list of allowed SSL ciphers.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemStringType("ssl_ciphers"),
		Source:    ParameterSourceDefault,
		ResetVal:  "HIGH:MEDIUM:+3DES:!aNULL",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"ssl_crl_dir": &Parameter{
		Name:      "ssl_crl_dir",
		Default:   "",
		Category:  "Connections and Authentication / SSL",
		ShortDesc: "Location of the SSL certificate revocation list directory.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemStringType("ssl_crl_dir"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"ssl_crl_file": &Parameter{
		Name:      "ssl_crl_file",
		Default:   "",
		Category:  "Connections and Authentication / SSL",
		ShortDesc: "Location of the SSL certificate revocation list file.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemStringType("ssl_crl_file"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"ssl_dh_params_file": &Parameter{
		Name:      "ssl_dh_params_file",
		Default:   "",
		Category:  "Connections and Authentication / SSL",
		ShortDesc: "Location of the SSL DH parameters file.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemStringType("ssl_dh_params_file"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"ssl_ecdh_curve": &Parameter{
		Name:      "ssl_ecdh_curve",
		Default:   "prime256v1",
		Category:  "Connections and Authentication / SSL",
		ShortDesc: "Sets the curve to use for ECDH.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemStringType("ssl_ecdh_curve"),
		Source:    ParameterSourceDefault,
		ResetVal:  "prime256v1",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"ssl_key_file": &Parameter{
		Name:      "ssl_key_file",
		Default:   "server.key",
		Category:  "Connections and Authentication / SSL",
		ShortDesc: "Location of the SSL server private key file.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemStringType("ssl_key_file"),
		Source:    ParameterSourceDefault,
		ResetVal:  "server.key",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"ssl_library": &Parameter{
		Name:      "ssl_library",
		Default:   "OpenSSL",
		Category:  "Preset Options",
		ShortDesc: "Shows the name of the SSL library.",
		Context:   ParameterContextInternal,
		Type:      types.NewSystemStringType("ssl_library"),
		Source:    ParameterSourceDefault,
		ResetVal:  "OpenSSL",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"ssl_max_protocol_version": &Parameter{
		Name:      "ssl_max_protocol_version",
		Default:   "",
		Category:  "Connections and Authentication / SSL",
		ShortDesc: "Sets the maximum SSL/TLS protocol version to use.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemEnumType("ssl_max_protocol_version", "", "TLSv1", "TLSv1.1", "TLSv1.2", "TLSv1.3"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"ssl_min_protocol_version": &Parameter{
		Name:      "ssl_min_protocol_version",
		Default:   "TLSv1.2",
		Category:  "Connections and Authentication / SSL",
		ShortDesc: "Sets the minimum SSL/TLS protocol version to use.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemEnumType("ssl_min_protocol_version", "TLSv1", "TLSv1.1", "TLSv1.2", "TLSv1.3"),
		Source:    ParameterSourceDefault,
		ResetVal:  "TLSv1.2",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"ssl_passphrase_command": &Parameter{
		Name:      "ssl_passphrase_command",
		Default:   "",
		Category:  "Connections and Authentication / SSL",
		ShortDesc: "Command to obtain passphrases for SSL.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemStringType("ssl_passphrase_command"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"ssl_passphrase_command_supports_reload": &Parameter{
		Name:      "ssl_passphrase_command_supports_reload",
		Default:   int8(0),
		Category:  "Connections and Authentication / SSL",
		ShortDesc: "Controls whether ssl_passphrase_command is called during server reload.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemBoolType("ssl_passphrase_command_supports_reload"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"ssl_prefer_server_ciphers": &Parameter{
		Name:      "ssl_prefer_server_ciphers",
		Default:   int8(1),
		Category:  "Connections and Authentication / SSL",
		ShortDesc: "Give priority to server ciphersuite order.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemBoolType("ssl_prefer_server_ciphers"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"standard_conforming_strings": &Parameter{
		Name:      "standard_conforming_strings",
		Default:   "on",
		Category:  "Version and Platform Compatibility / Previous PostgreSQL Versions",
		ShortDesc: "Causes '...' strings to treat backslashes literally.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemStringType("standard_conforming_strings"),
		Source:    ParameterSourceDefault,
		ResetVal:  "on",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"statement_timeout": &Parameter{
		Name:    "statement_timeout",
		Default: int64(0),
		// Unit: "ms",
		Category:  "Client Connection Defaults / Statement Behavior",
		ShortDesc: "Sets the maximum allowed duration of any statement.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("statement_timeout", 0, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"stats_fetch_consistency": &Parameter{
		Name:      "stats_fetch_consistency",
		Default:   "cache",
		Category:  "Statistics / Cumulative Query and Index Statistics",
		ShortDesc: "Sets the consistency of accesses to statistics data.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemEnumType("stats_fetch_consistency", "none", "cache", "snapshot"),
		Source:    ParameterSourceDefault,
		ResetVal:  "cache",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"superuser_reserved_connections": &Parameter{
		Name:      "superuser_reserved_connections",
		Default:   int64(3),
		Category:  "Connections and Authentication / Connection Settings",
		ShortDesc: "Sets the number of connection slots reserved for superusers.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemIntType("superuser_reserved_connections", 0, 262143, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(3),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"synchronize_seqscans": &Parameter{
		Name:      "synchronize_seqscans",
		Default:   int8(1),
		Category:  "Version and Platform Compatibility / Previous PostgreSQL Versions",
		ShortDesc: "Enable synchronized sequential scans.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("synchronize_seqscans"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"synchronous_commit": &Parameter{
		Name:      "synchronous_commit",
		Default:   "on",
		Category:  "Write-Ahead Log / Settings",
		ShortDesc: "Sets the current transaction's synchronization level.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemEnumType("synchronous_commit", "local", "remote_write", "remote_apply", "on", "off"),
		Source:    ParameterSourceDefault,
		ResetVal:  "on",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"synchronous_standby_names": &Parameter{
		Name:      "synchronous_standby_names",
		Default:   "",
		Category:  "Replication / Primary Server",
		ShortDesc: "Number of synchronous standbys and list of names of potential synchronous ones.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemStringType("synchronous_standby_names"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"syslog_facility": &Parameter{
		Name:      "syslog_facility",
		Default:   "local0",
		Category:  "Reporting and Logging / Where to Log",
		ShortDesc: "Sets the syslog \"facility\" to be used when syslog enabled.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemEnumType("syslog_facility", "local0", "local1", "local2", "local3", "local4", "local5", "local6", "local7"),
		Source:    ParameterSourceDefault,
		ResetVal:  "local0",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"syslog_ident": &Parameter{
		Name:      "syslog_ident",
		Default:   "postgres",
		Category:  "Reporting and Logging / Where to Log",
		ShortDesc: "Sets the program name used to identify PostgreSQL messages in syslog.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemStringType("syslog_ident"),
		Source:    ParameterSourceDefault,
		ResetVal:  "postgres",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"syslog_sequence_numbers": &Parameter{
		Name:      "syslog_sequence_numbers",
		Default:   int8(1),
		Category:  "Reporting and Logging / Where to Log",
		ShortDesc: "Add sequence number to syslog messages to avoid duplicate suppression.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemBoolType("syslog_sequence_numbers"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"syslog_split_messages": &Parameter{
		Name:      "syslog_split_messages",
		Default:   int8(1),
		Category:  "Reporting and Logging / Where to Log",
		ShortDesc: "Split messages sent to syslog by lines and to fit into 1024 bytes.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemBoolType("syslog_split_messages"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"tcp_keepalives_count": &Parameter{
		Name:      "tcp_keepalives_count",
		Default:   int64(0),
		Category:  "Connections and Authentication / TCP Settings",
		ShortDesc: "Maximum number of TCP keepalive retransmits.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("tcp_keepalives_count", 0, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"tcp_keepalives_idle": &Parameter{
		Name:    "tcp_keepalives_idle",
		Default: int64(0),
		// Unit: "s",
		Category:  "Connections and Authentication / TCP Settings",
		ShortDesc: "Time between issuing TCP keepalives.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("tcp_keepalives_idle", 0, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"tcp_keepalives_interval": &Parameter{
		Name:    "tcp_keepalives_interval",
		Default: int64(0),
		// Unit: "s",
		Category:  "Connections and Authentication / TCP Settings",
		ShortDesc: "Time between TCP keepalive retransmits.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("tcp_keepalives_interval", 0, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"tcp_user_timeout": &Parameter{
		Name:    "tcp_user_timeout",
		Default: int64(0),
		// Unit: "ms",
		Category:  "Connections and Authentication / TCP Settings",
		ShortDesc: "TCP user timeout.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("tcp_user_timeout", 0, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"temp_buffers": &Parameter{
		Name:    "temp_buffers",
		Default: int64(1024),
		// Unit: "8kB",
		Category:  "Resource Usage / Memory",
		ShortDesc: "Sets the maximum number of temporary buffers used by each session.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("temp_buffers", 100, 1073741823, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(1024),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"temp_file_limit": &Parameter{
		Name:    "temp_file_limit",
		Default: int64(-1),
		// Unit: "kB",
		Category:  "Resource Usage / Disk",
		ShortDesc: "Limits the total size of all temporary files used by each process.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemIntType("temp_file_limit", -1, math.MaxInt32, true),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(-1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"temp_tablespaces": &Parameter{
		Name:      "temp_tablespaces",
		Default:   "",
		Category:  "Client Connection Defaults / Statement Behavior",
		ShortDesc: "Sets the tablespace(s) to use for temporary tables and sort files.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemStringType("temp_tablespaces"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"timezone": &Parameter{
		Name:      "TimeZone",
		Default:   func() string { return time.Now().Location().String() }(),
		Category:  "Client Connection Defaults / Locale and Formatting",
		ShortDesc: "Sets the time zone for displaying and interpreting time stamps.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemStringType("timezone"),
		Source:    ParameterSourceConfigurationFile,
		// BootVal: "GMT",
		ResetVal: func() string { return time.Now().Location().String() }(),
		Scope:    GetPgsqlScope(PsqlScopeSession),
		ValidateFunc: func(a any) (any, bool) {
			switch v := a.(type) {
			case string:
				if strings.ToLower(v) == "local" {
					// TODO: fix this
					//   https://pkg.go.dev/github.com/thlib/go-timezone-local/tzlocal seems useful in this case.
					return "America/Los_Angeles", true
				} else {
					if strings.ToLower(v) == "utc" {
						v = "UTC"
					}
					loc, err := time.LoadLocation(v)
					if err == nil {
						return loc.String(), true
					}
					_, err = TzOffsetToDuration(v)
					if err == nil {
						return v, true
					}
					return nil, false
				}
			}
			return a, true
		},
	},
	"timezone_abbreviations": &Parameter{
		Name:      "timezone_abbreviations",
		Default:   "Default",
		Category:  "Client Connection Defaults / Locale and Formatting",
		ShortDesc: "Selects a file of time zone abbreviations.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemStringType("timezone_abbreviations"),
		Source:    ParameterSourceDefault,
		ResetVal:  "Default",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"trace_notify": &Parameter{
		Name:      "trace_notify",
		Default:   int8(0),
		Category:  "Developer Options",
		ShortDesc: "Generates debugging output for LISTEN and NOTIFY.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("trace_notify"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"trace_recovery_messages": &Parameter{
		Name:      "trace_recovery_messages",
		Default:   "log",
		Category:  "Developer Options",
		ShortDesc: "Enables logging of recovery-related debugging information.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemEnumType("trace_recovery_messages", "debug5", "debug4", "debug3", "debug2", "debug1", "log", "notice", "warning", "error"),
		Source:    ParameterSourceDefault,
		ResetVal:  "log",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"trace_sort": &Parameter{
		Name:      "trace_sort",
		Default:   int8(0),
		Category:  "Developer Options",
		ShortDesc: "Emit information about resource usage in sorting.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("trace_sort"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"track_activities": &Parameter{
		Name:      "track_activities",
		Default:   int8(1),
		Category:  "Statistics / Cumulative Query and Index Statistics",
		ShortDesc: "Collects information about executing commands.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemBoolType("track_activities"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"track_activity_query_size": &Parameter{
		Name:    "track_activity_query_size",
		Default: int64(1024),
		// Unit: "B",
		Category:  "Statistics / Cumulative Query and Index Statistics",
		ShortDesc: "Sets the size reserved for pg_stat_activity.query, in bytes.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemIntType("track_activity_query_size", 100, 1048576, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(1024),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"track_commit_timestamp": &Parameter{
		Name:      "track_commit_timestamp",
		Default:   int8(0),
		Category:  "Replication / Sending Servers",
		ShortDesc: "Collects transaction commit time.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemBoolType("track_commit_timestamp"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"track_counts": &Parameter{
		Name:      "track_counts",
		Default:   int8(1),
		Category:  "Statistics / Cumulative Query and Index Statistics",
		ShortDesc: "Collects statistics on database activity.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemBoolType("track_counts"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"track_functions": &Parameter{
		Name:      "track_functions",
		Default:   "none",
		Category:  "Statistics / Cumulative Query and Index Statistics",
		ShortDesc: "Collects function-level statistics on database activity.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemEnumType("track_functions", "none", "pl", "all"),
		Source:    ParameterSourceDefault,
		ResetVal:  "none",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"track_io_timing": &Parameter{
		Name:      "track_io_timing",
		Default:   int8(0),
		Category:  "Statistics / Cumulative Query and Index Statistics",
		ShortDesc: "Collects timing statistics for database I/O activity.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemBoolType("track_io_timing"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"track_wal_io_timing": &Parameter{
		Name:      "track_wal_io_timing",
		Default:   int8(0),
		Category:  "Statistics / Cumulative Query and Index Statistics",
		ShortDesc: "Collects timing statistics for WAL I/O activity.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemBoolType("track_wal_io_timing"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"transaction_deferrable": &Parameter{
		Name:      "transaction_deferrable",
		Default:   int8(0),
		Category:  "Client Connection Defaults / Statement Behavior",
		ShortDesc: "Whether to defer a read-only serializable transaction until it can be executed with no possible serialization failures.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("transaction_deferrable"),
		Source:    ParameterSourceOverride,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"transaction_isolation": &Parameter{
		Name:      "transaction_isolation",
		Default:   "READ-COMMITTED",
		Category:  "Client Connection Defaults / Statement Behavior",
		ShortDesc: "Sets the current transaction's isolation level.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemEnumType("transaction_isolation", "READ-UNCOMMITTED", "READ-COMMITTED", "REPEATABLE-READ", "SERIALIZABLE"),
		Source:    ParameterSourceOverride,
		ResetVal:  "READ-COMMITTED",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"transaction_read_only": &Parameter{
		Name:      "transaction_read_only",
		Default:   int8(0),
		Category:  "Client Connection Defaults / Statement Behavior",
		ShortDesc: "Sets the current transaction's read-only status.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("transaction_read_only"),
		Source:    ParameterSourceOverride,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"transform_null_equals": &Parameter{
		Name:      "transform_null_equals",
		Default:   int8(0),
		Category:  "Version and Platform Compatibility / Other Platforms and Clients",
		ShortDesc: "Treats \"expr=NULL\" as \"expr IS NULL\".",
		Context:   ParameterContextUser,
		Type:      types.NewSystemBoolType("transform_null_equals"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"unix_socket_directories": &Parameter{
		Name:      "unix_socket_directories",
		Default:   "/tmp",
		Category:  "Connections and Authentication / Connection Settings",
		ShortDesc: "Sets the directories where Unix-domain sockets will be created.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemStringType("unix_socket_directories"),
		Source:    ParameterSourceDefault,
		ResetVal:  "/tmp",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"unix_socket_group": &Parameter{
		Name:      "unix_socket_group",
		Default:   "",
		Category:  "Connections and Authentication / Connection Settings",
		ShortDesc: "Sets the owning group of the Unix-domain socket.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemStringType("unix_socket_group"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"unix_socket_permissions": &Parameter{
		Name:      "unix_socket_permissions",
		Default:   int64(511), // displays in octal, which is 0777
		Category:  "Connections and Authentication / Connection Settings",
		ShortDesc: "Sets the access permissions of the Unix-domain socket.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemIntType("unix_socket_permissions", 0, 511, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(511),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"update_process_title": &Parameter{
		Name:      "update_process_title",
		Default:   int8(1),
		Category:  "Reporting and Logging / Process Title",
		ShortDesc: "Updates the process title to show the active SQL command.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemBoolType("update_process_title"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"vacuum_buffer_usage_limit": &Parameter{
		Name:    "vacuum_buffer_usage_limit",
		Default: int64(256),
		// Unit: "kB",
		Category:  "Resource Usage / Memory",
		ShortDesc: "Sets the buffer pool size for VACUUM, ANALYZE, and autovacuum.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("vacuum_buffer_usage_limit", 0, 16777216, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(256),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"vacuum_cost_delay": &Parameter{
		Name:    "vacuum_cost_delay",
		Default: float64(0),
		// Unit: "ms",
		Category:  "Resource Usage / Cost-Based Vacuum Delay",
		ShortDesc: "Vacuum cost delay in milliseconds.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemDoubleType("vacuum_cost_delay", 0, 100),
		Source:    ParameterSourceDefault,
		ResetVal:  float64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"vacuum_cost_limit": &Parameter{
		Name:      "vacuum_cost_limit",
		Default:   int64(200),
		Category:  "Resource Usage / Cost-Based Vacuum Delay",
		ShortDesc: "Vacuum cost amount available before napping.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("vacuum_cost_limit", 1, 10000, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(200),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"vacuum_cost_page_dirty": &Parameter{
		Name:      "vacuum_cost_page_dirty",
		Default:   int64(20),
		Category:  "Resource Usage / Cost-Based Vacuum Delay",
		ShortDesc: "Vacuum cost for a page dirtied by vacuum.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("vacuum_cost_page_dirty", 0, 10000, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(20),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"vacuum_cost_page_hit": &Parameter{
		Name:      "vacuum_cost_page_hit",
		Default:   int64(1),
		Category:  "Resource Usage / Cost-Based Vacuum Delay",
		ShortDesc: "Vacuum cost for a page found in the buffer cache.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("vacuum_cost_page_hit", 0, 10000, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"vacuum_cost_page_miss": &Parameter{
		Name:      "vacuum_cost_page_miss",
		Default:   int64(2),
		Category:  "Resource Usage / Cost-Based Vacuum Delay",
		ShortDesc: "Vacuum cost for a page not found in the buffer cache.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("vacuum_cost_page_miss", 0, 10000, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(2),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"vacuum_failsafe_age": &Parameter{
		Name:      "vacuum_failsafe_age",
		Default:   int64(1600000000),
		Category:  "Client Connection Defaults / Statement Behavior",
		ShortDesc: "Age at which VACUUM should trigger failsafe to avoid a wraparound outage.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("vacuum_failsafe_age", 0, 2100000000, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(1600000000),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"vacuum_freeze_min_age": &Parameter{
		Name:      "vacuum_freeze_min_age",
		Default:   int64(50000000),
		Category:  "Client Connection Defaults / Statement Behavior",
		ShortDesc: "Minimum age at which VACUUM should freeze a table row.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("vacuum_freeze_min_age", 0, 1000000000, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(50000000),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"vacuum_freeze_table_age": &Parameter{
		Name:      "vacuum_freeze_table_age",
		Default:   int64(150000000),
		Category:  "Client Connection Defaults / Statement Behavior",
		ShortDesc: "Age at which VACUUM should scan whole table to freeze tuples.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("vacuum_freeze_table_age", 0, 2000000000, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(150000000),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"vacuum_multixact_failsafe_age": &Parameter{
		Name:      "vacuum_multixact_failsafe_age",
		Default:   int64(1600000000),
		Category:  "Client Connection Defaults / Statement Behavior",
		ShortDesc: "Multixact age at which VACUUM should trigger failsafe to avoid a wraparound outage.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("vacuum_multixact_failsafe_age", 0, 2100000000, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(1600000000),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"vacuum_multixact_freeze_min_age": &Parameter{
		Name:      "vacuum_multixact_freeze_min_age",
		Default:   int64(5000000),
		Category:  "Client Connection Defaults / Statement Behavior",
		ShortDesc: "Minimum age at which VACUUM should freeze a MultiXactId in a table row.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("vacuum_multixact_freeze_min_age", 0, 1000000000, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(5000000),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"vacuum_multixact_freeze_table_age": &Parameter{
		Name:      "vacuum_multixact_freeze_table_age",
		Default:   int64(150000000),
		Category:  "Client Connection Defaults / Statement Behavior",
		ShortDesc: "Multixact age at which VACUUM should scan whole table to freeze tuples.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("vacuum_multixact_freeze_table_age", 0, 2000000000, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(150000000),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"wal_block_size": &Parameter{
		Name:      "wal_block_size",
		Default:   int64(8192),
		Category:  "Preset Options",
		ShortDesc: "Shows the block size in the write ahead log.",
		Context:   ParameterContextInternal,
		Type:      types.NewSystemIntType("wal_block_size", 8192, 8192, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(8192),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"wal_buffers": &Parameter{
		Name:    "wal_buffers",
		Default: int64(512),
		// Unit: "8kB",
		Category:  "Write-Ahead Log / Settings",
		ShortDesc: "Sets the number of disk-page buffers in shared memory for WAL.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemIntType("wal_buffers", -1, 262143, true),
		Source:    ParameterSourceDefault,
		// BootVal: int64(-1),
		ResetVal: int64(512),
		Scope:    GetPgsqlScope(PsqlScopeSession),
	},
	"wal_compression": &Parameter{
		Name:      "wal_compression",
		Default:   "off",
		Category:  "Write-Ahead Log / Settings",
		ShortDesc: "Compresses full-page writes written in WAL file with specified method.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemEnumType("wal_compression", "pglz", "lz4", "on", "off"),
		Source:    ParameterSourceDefault,
		ResetVal:  "off",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"wal_consistency_checking": &Parameter{
		Name:      "wal_consistency_checking",
		Default:   "",
		Category:  "Developer Options",
		ShortDesc: "Sets the WAL resource managers for which WAL consistency checks are done.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemStringType("wal_consistency_checking"),
		Source:    ParameterSourceDefault,
		ResetVal:  "",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"wal_decode_buffer_size": &Parameter{
		Name:    "wal_decode_buffer_size",
		Default: int64(524288),
		// Unit: "B",
		Category:  "Write-Ahead Log / Recovery",
		ShortDesc: "Buffer size for reading ahead in the WAL during recovery.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemIntType("wal_decode_buffer_size", math.MaxUint16, 1073741823, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(524288),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"wal_init_zero": &Parameter{
		Name:      "wal_init_zero",
		Default:   int8(1),
		Category:  "Write-Ahead Log / Settings",
		ShortDesc: "Writes zeroes to new WAL files before first use.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemBoolType("wal_init_zero"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"wal_keep_size": &Parameter{
		Name:    "wal_keep_size",
		Default: int64(0),
		// Unit: "MB",
		Category:  "Replication / Sending Servers",
		ShortDesc: "Sets the size of WAL files held for standby servers.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("wal_keep_size", 0, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"wal_level": &Parameter{
		Name:      "wal_level",
		Default:   "replica",
		Category:  "Write-Ahead Log / Settings",
		ShortDesc: "Sets the level of information written to the WAL.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemEnumType("wal_level", "minimal", "replica", "logical"),
		Source:    ParameterSourceDefault,
		ResetVal:  "replica",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"wal_log_hints": &Parameter{
		Name:      "wal_log_hints",
		Default:   int8(0),
		Category:  "Write-Ahead Log / Settings",
		ShortDesc: "Writes full pages to WAL when first modified after a checkpoint, even for a non-critical modification.",
		Context:   ParameterContextPostmaster,
		Type:      types.NewSystemBoolType("wal_log_hints"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"wal_receiver_create_temp_slot": &Parameter{
		Name:      "wal_receiver_create_temp_slot",
		Default:   int8(0),
		Category:  "Replication / Standby Servers",
		ShortDesc: "Sets whether a WAL receiver should create a temporary replication slot if no permanent slot is configured.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemBoolType("wal_receiver_create_temp_slot"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"wal_receiver_status_interval": &Parameter{
		Name:    "wal_receiver_status_interval",
		Default: int64(10),
		// Unit: "s",
		Category:  "Replication / Standby Servers",
		ShortDesc: "Sets the maximum interval between WAL receiver status reports to the sending server.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("wal_receiver_status_interval", 0, 2147483, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(10),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"wal_receiver_timeout": &Parameter{
		Name:      "wal_receiver_timeout",
		Default:   int64(60000),
		Category:  "Replication / Standby Servers",
		ShortDesc: "Sets the maximum wait time to receive data from the sending server.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("wal_receiver_timeout", 0, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(60000),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"wal_recycle": &Parameter{
		Name:      "wal_recycle",
		Default:   int8(1),
		Category:  "Write-Ahead Log / Settings",
		ShortDesc: "Recycles WAL files by renaming them.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemBoolType("wal_recycle"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(1),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"wal_retrieve_retry_interval": &Parameter{
		Name:      "wal_retrieve_retry_interval",
		Default:   int64(5000),
		Category:  "Replication / Standby Servers",
		ShortDesc: "Sets the time to wait before retrying to retrieve WAL after a failed attempt.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("wal_retrieve_retry_interval", 1, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(5000),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"wal_segment_size": &Parameter{
		Name:    "wal_segment_size",
		Default: int64(16777216),
		// Unit: "B",
		Category:  "Preset Options",
		ShortDesc: "Shows the size of write ahead log segments.",
		Context:   ParameterContextInternal,
		Type:      types.NewSystemIntType("wal_segment_size", 1048576, 1073741824, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(16777216),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"wal_sender_timeout": &Parameter{
		Name:    "wal_sender_timeout",
		Default: int64(60000),
		// Unit: "ms",
		Category:  "Replication / Sending Servers",
		ShortDesc: "Sets the maximum time to wait for WAL replication.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("wal_sender_timeout", 0, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(60000),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"wal_skip_threshold": &Parameter{
		Name:    "wal_skip_threshold",
		Default: int64(2048),
		// Unit: "kB",
		Category:  "Write-Ahead Log / Settings",
		ShortDesc: "Minimum size of new file to fsync instead of writing WAL.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("wal_skip_threshold", 0, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(2048),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"wal_sync_method": &Parameter{
		Name:      "wal_sync_method",
		Default:   "open_datasync",
		Category:  "Write-Ahead Log / Settings",
		ShortDesc: "Selects the method used for forcing WAL updates to disk.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemEnumType("wal_sync_method", "fsync", "fsync_writethrough", "fdatasync", "open_sync", "open_datasync"),
		Source:    ParameterSourceDefault,
		ResetVal:  "open_datasync",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"wal_writer_delay": &Parameter{
		Name:    "wal_writer_delay",
		Default: int64(200),
		// Unit: "ms",
		Category:  "Write-Ahead Log / Settings",
		ShortDesc: "Time between WAL flushes performed in the WAL writer.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("wal_writer_delay", 1, 10000, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(200),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"wal_writer_flush_after": &Parameter{
		Name:    "wal_writer_flush_after",
		Default: int64(128),
		// Unit: "8kB",
		Category:  "Write-Ahead Log / Settings",
		ShortDesc: "Amount of WAL written out by WAL writer that triggers a flush.",
		Context:   ParameterContextSighup,
		Type:      types.NewSystemIntType("wal_writer_flush_after", 0, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(128),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"work_mem": &Parameter{
		Name:    "work_mem",
		Default: int64(4096),
		// Unit: "kB",
		Category:  "Resource Usage / Memory",
		ShortDesc: "Sets the maximum memory to be used for query workspaces.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemIntType("work_mem", 64, math.MaxInt32, false),
		Source:    ParameterSourceDefault,
		ResetVal:  int64(4096),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"xmlbinary": &Parameter{
		Name:      "xmlbinary",
		Default:   "base64",
		Category:  "Client Connection Defaults / Statement Behavior",
		ShortDesc: "Sets how binary values are to be encoded in XML.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemEnumType("xmlbinary", "base64", "hex"),
		Source:    ParameterSourceDefault,
		ResetVal:  "base64",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"xmloption": &Parameter{
		Name:      "xmloption",
		Default:   "content",
		Category:  "Client Connection Defaults / Statement Behavior",
		ShortDesc: "Sets whether XML data in implicit parsing and serialization operations is to be considered as documents or content fragments.",
		Context:   ParameterContextUser,
		Type:      types.NewSystemEnumType("xmloption", "content", "document"),
		Source:    ParameterSourceDefault,
		ResetVal:  "content",
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
	"zero_damaged_pages": &Parameter{
		Name:      "zero_damaged_pages",
		Default:   int8(0),
		Category:  "Developer Options",
		ShortDesc: "Continues processing past damaged page headers.",
		Context:   ParameterContextSuperUser,
		Type:      types.NewSystemBoolType("zero_damaged_pages"),
		Source:    ParameterSourceDefault,
		ResetVal:  int8(0),
		Scope:     GetPgsqlScope(PsqlScopeSession),
	},
}
