From: Alexander Gretencord <arutha@gmx.de>
To: linux-kernel@vger.kernel.org
Cc: Con Kolivas <kernel@kolivas.org>
Subject: Re: Swapping in 2.6.10 and 2.6.11.11 on a desktop system
Date: Wed, 15 Jun 2005 15:44:16 +0200 [thread overview]
Message-ID: <200506151544.17191.arutha@gmx.de> (raw)
In-Reply-To: <200506150242.02606.kernel@kolivas.org>
On Tuesday 14 June 2005 18:42, Con Kolivas wrote:
> Try the mapped watermark patch from -ck on 2.6.11*
Unfortunately this patch does not help either. The patch buys me time but then
I get swapping at the 300MB mark. 2.6.8.1 with swappiness=0 swaps later than
this...
These are 'free -m' statistics a minute after reaching the 300MB mark:
total used free shared buffers cached
Mem: 503 498 5 0 36 376
-/+ buffers/cache: 85 418
Swap: 494 227 266
Why does the kernel think that I need 400MB of disk cache when I start some
memory hungry apps? Can't we have a hard limit on disk cache, like: "Don't
use more than 100MB of disk cache".
The problem seems to be that instead of using a big disk cache when theres
plenty of ram and reducing disk cache when applications need the ram, the
disk cache shrinks until a magic watermark and then grows and grows until
theres no ram left for the applications. At least thats the behaviour I am
seeing.
Alex
P.S.: Please cc me as I'm not on the list.
next prev parent reply other threads:[~2005-06-15 13:44 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-14 14:53 Swapping in 2.6.10 and 2.6.11.11 on a desktop system Alexander Gretencord
2005-06-14 16:42 ` Con Kolivas
2005-06-15 13:44 ` Alexander Gretencord [this message]
2005-06-16 4:16 ` Con Kolivas
2005-06-20 19:09 ` Alexander Gretencord
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