linux-kernel - Re: Linux 2.6.31 - very swap-happy with plenty of free RAM

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Message-ID: <c0c067900911181640h64971680l4da14cdbe9fa6d59@mail.gmail.com>
Date:	Wed, 18 Nov 2009 19:40:46 -0500
From:	Dan Merillat <dan.merillat@...il.com>
To:	Tomasz Chmielewski <mangoo@...g.org>
Cc:	preining@...ic.at, riel@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: Linux 2.6.31 - very swap-happy with plenty of free RAM

On Wed, Nov 18, 2009 at 4:45 PM, Tomasz Chmielewski <mangoo@...g.org> wrote:

> I have a pretty powerful desktop machine with 8 GB RAM, fast disks with
> RAID-1 etc.

> Every 10 minutes or so, machine is really unresponsive, load jumps to 10 or
> 20. Mouse pointer jumps, it's impossible to change between windows etc.

This is the type of hefty workstation many of the core developers
have, running similar workloads, so I'm somewhat surprised that the
default VM settings have this kind of issue.

> Do a "swapoff -a", and everything is snappy and responsive as it should,
> there are no more lags.

Yes, that's my exact finding.

Is this weird IO storm happening for anyone else with plenty of memory
(for their taskload?)
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