From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762663AbXGEXxR (ORCPT ); Thu, 5 Jul 2007 19:53:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1759896AbXGEXxJ (ORCPT ); Thu, 5 Jul 2007 19:53:09 -0400 Received: from wa-out-1112.google.com ([209.85.146.181]:52664 "EHLO wa-out-1112.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759802AbXGEXxI (ORCPT ); Thu, 5 Jul 2007 19:53:08 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=E96zVMd+72hfn9aFDmmnAFsvbR2f7L0BkcxD6K6rfz5rBdVQu4rCvIjJkuv1bBxA5oM8Buo5LqMRrC8jFP2Q1/ndlVKhtUDkvrpZHDNyUzIQBKL998Fo+mM4DiAPBppBRIYmgMZVFGxf8nLjR2cdtzbVMTNPvDA+piJLOeJCwxw= Message-ID: <9a8748490707051653q6e1b6bf3g9a3d6edf213867d9@mail.gmail.com> Date: Fri, 6 Jul 2007 01:53:07 +0200 From: "Jesper Juhl" To: "Robert Hancock" Subject: Re: Understanding I/O behaviour Cc: knobi@knobisoft.de, linux-kernel@vger.kernel.org In-Reply-To: <468D832B.4060002@shaw.ca> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <468D832B.4060002@shaw.ca> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On 06/07/07, Robert Hancock wrote: [snip] > > Try playing with reducing /proc/sys/vm/dirty_ratio and see how that > helps. This workload will fill up memory with dirty data very quickly, > and it seems like system responsiveness often goes down the toilet when > this happens and the system is going crazy trying to write it all out. > Perhaps trying out a different elevator would also be worthwhile. -- Jesper Juhl Don't top-post http://www.catb.org/~esr/jargon/html/T/top-post.html Plain text mails only, please http://www.expita.com/nomime.html