From: Jim C. Nasby <jnasby@pervasive.com>
To: Csaba Nagy <nagy@ecircle-ag.com>
Cc: Mikael Carneholm <Mikael.Carneholm@WirelessCar.com>
Cc: postgres performance list <pgsql-performance@postgresql.org>
Subject: Re: Migration study, step 1: bulk write performance
Date: Tue, 21 Mar 2006 05:27:59 -0600
Message-ID: <20060321112759.GF15742@pervasive.com> (raw)
In-Reply-To: <1142867952.16487.96.camel@coppola.muc.ecircle.de>
References: <7F10D26ECFA1FB458B89C5B4B0D72C2B088286@sesrv12.wirelesscar.com>
<1142867952.16487.96.camel@coppola.muc.ecircle.de>
On Mon, Mar 20, 2006 at 04:19:12PM +0100, Csaba Nagy wrote:
> What I can add from our experience: ext3 turned out lousy for our
> application, and converting to XFS made a quite big improvement for our
> DB load. I don't have hard figures, but I think it was some 30%
> improvement in overall speed, and it had a huge improvement for heavy
> load times... what I mean is that with ext3 we had multiple parallel big
> tasks executing in more time than if we would have executed them
> sequentially, and with XFS that was gone, load scales linearly. In any
> case you should test the performance of your application on different FS
> and different settings, as this could make a huge difference.
Did you try mounting ext3 whith data=writeback by chance? People have
found that makes a big difference in performance.
http://archives.postgresql.org/pgsql-performance/2003-01/msg00320.php
--
Jim C. Nasby, Sr. Engineering Consultant jnasby@pervasive.com
Pervasive Software http://pervasive.com work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461
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To: pgsql-performance@postgresql.org
Cc: jnasby@pervasive.com, nagy@ecircle-ag.com, Mikael.Carneholm@WirelessCar.com
Subject: Re: Migration study, step 1: bulk write performance
In-Reply-To: <20060321112759.GF15742@pervasive.com>
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