On Fri, Aug 22, 2008 at 09:46:06AM -0500, Edwin Zoeller wrote:
> Other admins here are disputing the results and claim that Linux
> buffers all the memory and gives what it needs. I don't know for
> fact it this is true. I have also run top, free and ps -eo checking
> on memory size, all give back the same results as the Nagios
> plugin. Is this plugin with the option chosen giving real memory
> results or bogus results.
I can't speak to the last question, but the first one is in fact true:
Here's my laptop:
$ free
total used free shared buffers cached
Mem: 2075116 1924264 150852 0 1360 1651460
-/+ buffers/cache: 271444 1803672
Swap: 1052216 0 1052216
$
Note that not much is free, but lots is cached. And that nothing is
swapped.
IMO, that's the most useful number to measure: most machines will reach
a steadystate where there is 0 or very little (a few tens of megabytes)
of active swap.
If your swap starts to climb, that's when *I* worry...
Cheers,
-- jra
--
Jay R. Ashworth Baylink [EMAIL PROTECTED]
Designer The Things I Think RFC 2100
Ashworth & Associates http://baylink.pitas.com '87 e24
St Petersburg FL USA http://photo.imageinc.us +1 727 647 1274
Those who cast the vote decide nothing.
Those who count the vote decide everything.
-- (Josef Stalin)
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