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Date: Mon, 26 Jul 2004 18:09:43 -0700
From: Andrew Morton <akpm@osdl.org>
To: Clemens Schwaighofer <cs@tequila.co.jp>
Cc: kernel@kolivas.org, Joel.Becker@oracle.com, linux-kernel@vger.kernel.org
Subject: Re: Autotune swappiness01
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Clemens Schwaighofer <cs@tequila.co.jp> wrote:
>
> Con Kolivas wrote:
> | Andrew Morton writes:
> 
> |> Yes, I think 60% is about right for a 512-768M box.  Too high for the
> |> smaller machines, too low for the larger ones.
> |
> |
> | Sigh..
> | I have a 1Gb desktop machine that refuses to keep my applications in ram
> | overnight if I have a swappiness higher than the default so I think lots
> | of desktop users with more ram will be unhappy with higher settings.
> 
> I have 1 GB and I had a setting of 51 (seemed to be perhaps gentoo
> default or so) and I especially after a weekend (2 days off) it is
> always the "monday-morning-swap-hell" where I have to wait 5min until he
> swapped in the apps he swapped out during weekend.
> 
> I changed that to 20 now, but I don't know if this will make things
> worse or better.
> 

It may appear to be better, but you now have 100, maybe 200 megabytes less
pagecache available across the entire working day.