From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jordan Russell Subject: Re: MD RAID1 performance very different from non-RAID partition Date: Mon, 17 Sep 2007 10:58:11 -0500 Message-ID: <46EEA413.8090706@quo.to> References: <46EB6D67.1000802@quo.to> <20070915070914.GA21515@teal.hq.k1024.org> <46EC2043.5010006@quo.to> <878x765kmy.fsf@informatik.uni-tuebingen.de> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <878x765kmy.fsf@informatik.uni-tuebingen.de> Sender: linux-raid-owner@vger.kernel.org To: Goswin von Brederlow Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids Goswin von Brederlow wrote: > Jordan Russell writes: >> It's an ext3 partition, so I guess that doesn't apply? >> >> I tried remounting /dev/sda2 with the "barrier=0" option (which I assume >> disables barriers, looking at the source), though, just to see if it >> would make any difference, but it didn't; the database build still took >> 31 minutes. > > Compare the read ahead settings. I'm not sure what you mean. There's a per-mount read ahead setting? -- Jordan Russell