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c.f. bug 424647
List Archive: gentoo-performance
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To: gentoo-performance@g.o, gpark@...
From: Colin Kingsley <ckingsley@...>
Subject: Re: swap?
Date: Sat, 31 Jul 2004 12:25:21 -0400
just a thought. A server environment might benefit from setting the
swappiness factor higher. try echo "100" > /proc/sys/vm/swappiness
 
On Sat, 31 Jul 2004 07:27:36 -0600, Gyujin Park <gpark@...> wrote:
> Yes, response in Apache, and vsFTP gets really slow until more memory frees out.
> (Report from users and other admins while I was testing the system.)
>
> Thanks,
> 
> Tom
> 
> On Fri Jul 30 20:42 , Colin Kingsley <ckingsley@...> sent:
> 
> >As far as I know, your system should be stable. The details of how
> >much memory/swap is used at any given moment probably depends on your
> >kernel, how much memory you have, etc.
> >
> >Do you have any actual evidence of the slow down you mentioned? the
> >system should begin using swap when/if it needs to. it looks to me
> >like you discovered the "free" command and are seeing problems where
> >none exist.
> >
> >On Sat, 31 Jul 2004 03:53:58 +0200, lukas lukas@...> wrote:
> >> On Saturday 31 July 2004 02:42, Gyujin Park wrote:
> >> > Does this mean the system will be still stable with 99% memory usage?
> >> > I mean, at some point it should turn into swap. The system reaches up
> >> > to 99% physical memory usage with less than 3 MB of physical memory
> >> > left.
> >>
> >> "free" gives me the following outout on my workstation:
> >>
> >>              total       used       free     shared    buffers     cached
> >> Mem:       1550840    1308096     242744          0      94244     859148
> >> -/+ buffers/cache:     354704    1196136
> >> Swap:       522104      23868     498236
> >>
> >> About 84% memory is used. But about 900MB are used for caching and
> >> buffering, so in fact there are only about 346MB in "real use".
> >> If your memory is 99% without buffers and cache, then there is
> >> something wrong (but I don't know what).
> >> Can you see a process that consumes that much memory when you are
> >> calling "ps" or "top"?
> >> What kind of kernel do you use?
> >>
> >> cu
> >>
> >> lukas
> >>
> >>
> >>
> >
> >--
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> >
> 
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References:
Re: swap?
-- Gyujin Park
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Updated Jun 17, 2009

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