Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934679AbXHNCZr (ORCPT ); Mon, 13 Aug 2007 22:25:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755333AbXHNCZc (ORCPT ); Mon, 13 Aug 2007 22:25:32 -0400 Received: from one.firstfloor.org ([213.235.205.2]:58954 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753534AbXHNCZb (ORCPT ); Mon, 13 Aug 2007 22:25:31 -0400 Date: Tue, 14 Aug 2007 04:25:29 +0200 From: Andi Kleen To: Stewart Smith Cc: Brice Figureau , Andi Kleen , linux-kernel@vger.kernel.org Subject: Re: [PATCH 00/23] per device dirty throttling -v8 Message-ID: <20070814022529.GA11322@one.firstfloor.org> References: <20070803123712.987126000@chello.nl> <20070804063217.GA25069@elte.hu> <1186389638.30448.29.camel@localhost.localdomain> <1187055897.18858.31.camel@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1187055897.18858.31.camel@localhost.localdomain> User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 825 Lines: 19 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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/