From: Bruce Guenter <bruceg@em.ca>
To: linux-kernel@vger.kernel.org
Subject: Re: Where's all my memory going?
Date: Thu, 10 Jan 2002 02:45:20 -0600 [thread overview]
Message-ID: <20020110024520.A29045@em.ca> (raw)
In-Reply-To: <E16OMpF-0001pj-00@the-village.bc.nu> <Pine.LNX.4.33L.0201092034590.2985-100000@imladris.surriel.com>
In-Reply-To: <Pine.LNX.4.33L.0201092034590.2985-100000@imladris.surriel.com>; from riel@conectiva.com.br on Wed, Jan 09, 2002 at 08:36:13PM -0200
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On Wed, Jan 09, 2002 at 08:36:13PM -0200, Rik van Riel wrote:
> Matt's system seems to go from 900 MB free to about
> 300 MB (free + cache).
>
> I doubt qmail would eat 600 MB of RAM (it might, I
> just doubt it) so I'm curious where the RAM is going.
I am seeing the same symptoms, with similar use -- ext3 filesystems
running qmail. Adding up the RSS of all the processes in use gives
about 75MB, while free shows:
total used free shared buffers cached
Mem: 901068 894088 6980 0 157568 113856
-/+ buffers/cache: 622664 278404
Swap: 1028152 10468 1017684
This are fairly consistent numbers. buffers hovers around 150MB and
cached around 110MB all day. The server is heavy on write traffic.
> Matt, do you see any suspiciously high numbers in
> /proc/slabinfo ?
What would be suspiciously high? The four biggest numbers I see are:
inode_cache 139772 204760 480 25589 25595 1
dentry_cache 184024 326550 128 10885 10885 1
buffer_head 166620 220480 96 4487 5512 1
size-64 102388 174876 64 2964 2964 1
I can post complete details for any who wish to investigate further. I
am not seeing a huge slowdown, but I have no real baseline to compare
against.
--
Bruce Guenter <bruceg@em.ca> http://em.ca/~bruceg/ http://untroubled.org/
OpenPGP key: 699980E8 / D0B7 C8DD 365D A395 29DA 2E2A E96F B2DC 6999 80E8
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next prev parent reply other threads:[~2002-01-10 8:45 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-09 17:36 Where's all my memory going? Matt Dainty
2002-01-09 17:47 ` Alan Cox
2002-01-09 22:36 ` Rik van Riel
2002-01-10 8:45 ` Bruce Guenter [this message]
2002-01-10 10:05 ` Andreas Dilger
2002-01-10 11:28 ` Matt Dainty
2002-01-10 14:55 ` Matt Dainty
2002-01-10 16:17 ` David Rees
2002-01-10 20:46 ` Andreas Dilger
2002-01-10 22:24 ` Bruce Guenter
2002-01-10 22:36 ` Andreas Dilger
2002-01-14 11:40 ` Matt Dainty
2002-01-10 22:18 ` Bruce Guenter
-- strict thread matches above, loose matches on Subject: below --
2002-01-11 15:30 Rolf Lear
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