[CentOS] 2.6 memory management question
Feizhou
feizhou at graffiti.net
Wed Apr 11 03:50:36 UTC 2007
>> [2]$ cat /proc/meminfo
>> MemTotal: 7128956 kB
>> MemFree: 2132556 kB
>> Buffers: 556832 kB
>> Cached: 2821408 kB
>
> A supplementary question, can anyone explain what "buffers" and "cached"
> are? I have a performance problem with postgresql (discussion is on the
> postgresql list), and I see those figures displayed by commands such as
> free, top and procinfo but the man pages don't define them.
>
>
>
Buffers = disk buffers (buffers of stuff to be read/written)
Cached = page cache which stores filesystem and process pages...copy of
files in memory
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