linux-kernel - Re: tracking memory usage/leak in "inactive" field in /proc/meminfo?

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Message-Id: <20100210093140.12D9.A69D9226@jp.fujitsu.com>
Date:	Wed, 10 Feb 2010 09:32:07 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	"Chris Friesen" <cfriesen@...tel.com>
Cc:	kosaki.motohiro@...fujitsu.com, Rik van Riel <riel@...hat.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-mm@...ck.org
Subject: Re: tracking memory usage/leak in "inactive" field in /proc/meminfo?

> Hi,
> 
> I'm hoping you can help me out.  I'm on a 2.6.27 x86 system and I'm
> seeing the "inactive" field in /proc/meminfo slowly growing over time to
> the point where eventually the oom-killer kicks in and starts killing
> things.  The growth is not evident in any other field in /proc/meminfo.
> 
> I'm trying to figure out where the memory is going, and what it's being
> used for.
> 
> As I've found, the fields in /proc/meminfo don't add up...in particular,
> active+inactive is quite a bit larger than
> buffers+cached+dirty+anonpages+mapped+pagetables+vmallocused.  Initially
> the difference is about 156MB, but after about 13 hrs the difference is
> 240MB.
> 
> How can I track down where this is going?  Can you suggest any
> instrumentation that I can add?
> 
> I'm reasonably capable, but I'm getting seriously confused trying to
> sort out the memory subsystem.  Some pointers would be appreciated.

can you please post your /proc/meminfo?



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