linux-kernel - Re: VM - a plenty of inactive memory

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Date:	Thu, 10 Apr 2008 00:01:58 +0900
From:	"KOSAKI Motohiro" <kosaki.motohiro@...fujitsu.com>
To:	"Andreas Grimm" <agrimm61@...il.com>
Cc:	"Johannes Weiner" <hannes@...urebad.de>,
	linux-kernel@...r.kernel.org, kosaki.motohiro@...fujitsu.com,
	kosaki.motohiro@...il.com
Subject: Re: VM - a plenty of inactive memory

Hi

>  i know this. But why the kernel locks that memory for a so long time
>  (2 days now)?

maybe, page cache consume it.
it isn't mean that waste memory.

> Is there a way to enforce the reclaiming?

following command drop all cache. (but I don't reccomend it)

# echo 3 > /proc/sys/vm/drop_caches


>  And how can i
>  find out, which process owns that memory.

please use free command and see second line(+ buffer/cache'ed free mem).

>  The problem is, that i can't
>  accept, that the free memory fell down to 50MB, when i have 24GB in
>  the nirvana. The system was recently very close to the awkward
>  situation to swap to disk, and i bet it will do so in the next few
>  days, because it happened before. Unintelligible, if one got that much
>  ram.

may be, it is not happend forever.
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