period configuration item specifies how long to wait between
pings. The units are (integer) seconds. If there is one integer,
‘alive’ uses it as a fixed period. If there are two, the first
must be less than or equal than the second, and ‘alive’ chooses a
random number between (inclusively) the two.
;;; period (-*- scheme -*-) ;; quickly ; 3 ;; languidly ; 391 ;; randomly, but not too quickly 149 420 ;;; period ends here