Real Memory Usage

[Steve Phillips]

On Tue, 22 Feb 2005, Bill Matthews wrote:
>
> vmstat 5 5
> procs                      memory      swap          io     system         cpu
> r  b   swpd   free   buff  cache   si   so    bi    bo   in    cs us sy wa id
> 0  0      0 291788 149368 1368452    0    0     2     3    2     3  2  1  0  7
> 0  1      0 291876 149368 1368448    0    0     0   739  137   103  3  3  0 95
> 0  1      0 292128 149368 1368452    0    0     0   370  164    50  1  0  1 98
> 0  0      0 292344 149368 1368456    0    0     0   135  136   215  1  2  0 96
> 0  0      0 291968 149368 1368456    0    0     0   112  312   204  2  1  0 98

>From this, you have

291788  free memory (completely unused)
149368  buffered pages
1368452 cached stuff

this comes to around 1,810,000 K or 1.8Gig of RAM

which leaves around 200 Meg of RAM in use by programs and 1.8Gig available 
for use.

The way linux handles memory is a little different from other OS's and as 
such it will appear to have used all available RAM when in actual fact 
this is not the case (well, it IS but it is just doing what its been 
designed to do)

more info can be seen at..

http://forums.gentoo.org/viewtopic.php?t=175419

HTH,

-- 
Steve.

>
> So you can see it only has 300MB of memory free, meaning 1.7GB is
> used.   The only commands I'm familiar with our ps -aef and top.
>
> top shows %MEM but almost all processes are 0.0%. Some are 0.5 or 0.1.
>
> Not sure where to look?
>
> Thanks
> BM
>
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