From: Tomasz Chmielewski <mangoo@wpkg.org>
To: linux-mm@kvack.org
Subject: why my systems never cache more than ~900 MB?
Date: Tue, 24 Mar 2009 09:42:08 +0100 [thread overview]
Message-ID: <49C89CE0.2090103@wpkg.org> (raw)
On my (32 bit) systems with more than 1 GB memory it is impossible to cache more than about 900 MB. Why?
Caching never goes beyond ~900 MB (i.e. when I read a mounted drive with dd):
# free
total used free shared buffers cached
Mem: 2076164 966788 1109376 0 855132 68932
-/+ buffers/cache: 42724 2033440
Swap: 2097144 0 2097144
Same behaviour on 32 bit machines with 4 GB RAM.
No problems on 64 bit machines.
I have one 32 bit machine that caches beyond ~900 MB without problems.
Is it some kernel/proc/sys setting that I'm missing?
--
Tomasz Chmielewski
http://wpkg.org
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next reply other threads:[~2009-03-24 8:36 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-24 8:42 Tomasz Chmielewski [this message]
2009-03-24 15:20 ` why my systems never cache more than ~900 MB? Nick Piggin
2009-03-24 15:35 ` Tomasz Chmielewski
2009-03-24 15:42 ` Nick Piggin
2009-03-24 15:44 ` Christoph Lameter
2009-03-24 16:00 ` Tomasz Chmielewski
2009-03-24 16:24 ` Christoph Lameter
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