From: Michal Hocko <mhocko@suse.cz>
To: Rogier Wolff <R.E.Wolff@bitwizard.nl>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Buffer cache not working.
Date: Tue, 20 May 2014 15:05:56 +0200 [thread overview]
Message-ID: <20140520130556.GA10945@dhcp22.suse.cz> (raw)
In-Reply-To: <20140514144632.GB7404@bitwizard.nl>
On Wed 14-05-14 16:46:32, Rogier Wolff wrote:
[...]
> Kernel: from Ubuntu 14.04, 3.13.0-19-generic
The kernel is 64b right?
> 32-bit userspace
> 16Gb RAM installed.
> Disks: 3x 3T in RAID5
>
> ganglia shows the server memory graph as follows:
> http://prive.bitwizard.nl/server_mem.png
This shows that the memory usage didn't go over 5G. That is suspicious.
Is this a NUMA machine? Is it possible that zone_reclaim_mode is enabled
(cat /proc/sys/vm/zone_reclaim_mode)?
> All other computers have a "nice" filled graph there.
>
> So, is there a bug in my kernel or am I missing an important tuning
> parameter?
>
>
> Roger.
>
> --
> ** R.E.Wolff@BitWizard.nl ** http://www.BitWizard.nl/ ** +31-15-2600998 **
> ** Delftechpark 26 2628 XH Delft, The Netherlands. KVK: 27239233 **
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Michal Hocko
SUSE Labs
prev parent reply other threads:[~2014-05-20 13:05 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-14 14:46 Rogier Wolff
2014-05-20 13:05 ` Michal Hocko [this message]
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