System information

30 System Analysis and Tuning Guide
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 2689024 kB
DirectMap2M: 5691392 kB
The most important entries are:
MemTotal
Total amount of usable RAM
MemFree
Total amount of unused RAM
Buffers
File buffer cache in RAM
Cached
Page cache (excluding buffer cache) in RAM
SwapCached
Page cache in swap
Active
Recently used memory that normally is not reclaimed. This value is the sum of
memory claimed by anonymous pages (listed as Active(anon)) and file-backed
pages (listed as Active(file))
Inactive
Recently unused memory that can be reclaimed. This value is the sum of memo-
ry claimed by anonymous pages (listed as Inactive(anon)) and file-backed pages
(listed as Inactive(file)).
SwapTotal
Total amount of swap space
SwapFree
Total amount of unused swap space
Dirty
Amount of memory that will be written to disk
Writeback
Amount of memory that currently is written to disk