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#1 (**permalink**) 01-05-2008, 05:29 AM

My probleme is:

I have a server with 12 Go RAM.
The memory is used in the folowing way:
-50% for computionnal page
-50% for the file système cache

And minperm=5% and maxperm=10%.

My probleme is that the system use the swap space whereas the size of
the cache is greater maxperm. The system should use page cache instead
of use swap space and I don't know why it does it.

Thanks for your help.
Sébastien Brillard

#2 (**permalink**) 01-05-2008, 05:29 AM

> And minperm=5% and maxperm=10%.
>
> My probleme is that the system use the swap space whereas the size of
> the cache is greater maxperm. The system should use page cache
instead
> of use swap space and I don't know why it does it.

even if maxperm is set low, you will still build filesystem cache
until you hit minfree, then you will only page file pages. you can stop
this by setting a hard limit for maxperm (strict_maxperm) or you can
stop pages being cached for a filesystem in the 1st place by mounting
them -rbrw (release behind)

HTH
Mark Taylor

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