linux-kernel - Re: Memory usage per memory zone

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Message-ID: <20090311114353.GA759@localhost>
Date:	Wed, 11 Mar 2009 19:43:53 +0800
From:	Wu Fengguang <fengguang.wu@...el.com>
To:	jack marrow <jackmarrow2@...il.com>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: Memory usage per memory zone

Hi jack,

On Wed, Mar 11, 2009 at 11:41:43AM +0100, jack marrow wrote:
> Hello,
> 
> I have a box where the oom-killer is killing processes due to running
> out of memory in zone_normal. I can see using slabtop that the inode

How do you know that the memory pressure on zone normal stand out alone?

> caches are using up lots of memory and guess this is the problem, so
> have cleared them using an echo to drop_caches.

It would better be backed by concrete numbers...

> 
> I would quite like to not guess though - is it possible to use slabtop
> (or any other way) to view ram usage per zone so I can pick out the
> culprit?

/proc/zoneinfo and /proc/vmstat do have some per-zone numbers.
Some of them deal with slabs.

Thanks,
Fengguang

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