<s>
Big	B-Operating_System
memory	I-Operating_System
computers	O
are	O
machines	O
with	O
a	O
large	O
amount	O
of	O
random-access	B-Architecture
memory	I-Architecture
(	O
RAM	B-Architecture
)	O
.	O
</s>
<s>
The	O
computers	O
are	O
required	O
for	O
databases	O
,	O
graph	O
analytics	O
,	O
or	O
more	O
generally	O
,	O
high-performance	B-Architecture
computing	I-Architecture
,	O
data	O
science	O
and	O
big	B-Application
data	I-Application
.	O
</s>
<s>
See	O
list	B-General_Concept
of	I-General_Concept
in-memory	I-General_Concept
databases	I-General_Concept
.	O
</s>
<s>
The	O
performance	O
of	O
big	B-Operating_System
memory	I-Operating_System
systems	O
depends	O
on	O
how	O
the	O
central	B-General_Concept
processing	I-General_Concept
units	I-General_Concept
(	O
CPUs	O
)	O
access	O
the	O
memory	O
,	O
via	O
a	O
conventional	O
memory	B-General_Concept
controller	I-General_Concept
or	O
via	O
non-uniform	B-Operating_System
memory	I-Operating_System
access	I-Operating_System
(	O
NUMA	O
)	O
.	O
</s>
<s>
Performance	O
also	O
depends	O
on	O
the	O
size	O
and	O
design	O
of	O
the	O
CPU	B-General_Concept
cache	I-General_Concept
.	O
</s>
<s>
Performance	O
also	O
depends	O
on	O
operating	B-General_Concept
system	I-General_Concept
(	O
OS	O
)	O
design	O
.	O
</s>
<s>
The	O
huge	O
pages	O
feature	O
in	O
Linux	O
and	O
other	O
OSes	O
can	O
improve	O
the	O
efficiency	O
of	O
virtual	B-Architecture
memory	I-Architecture
.	O
</s>
