linux-kernel - Re: [PATCH 00/23] per device dirty throttling -v8

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Message-ID: <20070814022529.GA11322@one.firstfloor.org>
Date:	Tue, 14 Aug 2007 04:25:29 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Stewart Smith <stewart@...ql.com>
Cc:	Brice Figureau <brice+lklm@...sofwonder.com>,
	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 00/23] per device dirty throttling -v8

On Tue, Aug 14, 2007 at 11:44:56AM +1000, Stewart Smith wrote:
> > Since the database fits in RAM, the only kind of access Mysql is doing
> > is writing to the innodb log, the mysql binlog and finally to the innodb
> > database files.
> > There are certainly a whole lot of fsync'ing happening.
> 
> yes. Keep in mind that the binlog grows in file size too... so this has
> to sync all the metadata as well (ick, i know).

It might be an interesting experiment to see if it still happens
with the file system remounted as ext2. ext2 has a much more 
benign fsync than ext3.

-Andi
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