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

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Date:	Wed, 9 Apr 2008 18:28:28 +0200
From:	"Andreas Grimm" <agrimm61@...il.com>
To:	"KOSAKI Motohiro" <kosaki.motohiro@...fujitsu.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: VM - a plenty of inactive memory

Hi,

the output of free:
-/+ buffers/cache:   30718212    2547704
Information in frees man page is very sparse, what's the
interpretation? I will try the drop_cache thing in the night.
Thanks!

2008/4/9, KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>:
> 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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