Subject: Re: vmstat output: avm + free is too much?
To: Olaf Seibert <rhialto@polderland.nl>
From: Simon Burge <simonb@wasabisystems.com>
List: current-users
Date: 04/03/2001 10:49:13
Olaf Seibert wrote:

> This is some output from vmstat -w 5, on my quiet Alpha system (no user
> interaction) that has 64M of memory and is not paging:
> 
>  procs   memory     page                       disks     faults      cpu
>  r b w   avm   fre  flt  re  pi   po   fr   sr  w0  s0   in   sy  cs us sy id
>  1 1 0 66056 21152   27   0   0    0    0    0   1   2 1040  131  37 99  1  0
>  1 0 0 66064 21152    1   0   0    0    0    0   0   0 1034   90  26 100  0  0
>  1 0 0 66064 21152    1   0   0    0    0    0   0   1 1034  105  30 100  0  0
>  1 0 0 66064 21152    1   0   0    0    0    0   1   2 1038   89  32 100  0  0
> 
> (some disks removed to make it fit in 80 columns)
> 
> Should avm + fre not add up to the total amount of core when not paging?
> These numbers have been stable during more than 20 seconds.

At a guess, avm counts pages that are mapped multiple times (eg,
shared libraries).

Simon.
--
Simon Burge                            <simonb@wasabisystems.com>
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