Received: from maia.hub.org (maia-2.hub.org [200.46.204.251]) by mail.postgresql.org (Postfix) with ESMTP id 46C9D1337B4F for ; Mon, 11 Oct 2010 14:50:30 -0300 (ADT) Received: from mail.postgresql.org ([200.46.204.86]) by maia.hub.org (mx1.hub.org [200.46.204.251]) (amavisd-maia, port 10024) with ESMTP id 44584-01 for ; Mon, 11 Oct 2010 17:50:22 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from glacier.frostconsultingllc.com (glacier.frostconsultingllc.com [69.36.227.170]) by mail.postgresql.org (Postfix) with ESMTP id 8B171133655C for ; Mon, 11 Oct 2010 14:50:22 -0300 (ADT) Received: from dsl081-245-111.sfo1.dsl.speakeasy.net ([64.81.245.111] helo=Sidney-Stratton.local) by glacier.frostconsultingllc.com with esmtpsa (TLSv1:CAMELLIA256-SHA:256) (Exim 4.69) (envelope-from ) id 1P5MVq-0008KO-HW for pgsql-performance@postgresql.org; Mon, 11 Oct 2010 10:50:20 -0700 Message-ID: <4CB34E50.3080201@agliodbs.com> Date: Mon, 11 Oct 2010 10:50:08 -0700 From: Josh Berkus User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.1b3pre) Gecko/20090223 Thunderbird/3.0b2 MIME-Version: 1.0 To: pgsql-performance@postgresql.org Subject: Re: XFS vs Ext3, and schedulers, for WAL References: <4CAD0214.50304@agliodbs.com> In-Reply-To: <4CAD0214.50304@agliodbs.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=-1.9 tagged_above=-10 required=5 tests=BAYES_00=-1.9 X-Spam-Level: X-Archive-Number: 201010/113 X-Sequence-Number: 40532 > There's a number of blog tests floating around comparing XFS and Ext3, > and the various Linux schedulers, for PGDATA or for an all-in-one mount. > > However, the WAL has a rather particular write pattern, and it's > reasonable to assume that it shouldn't be optimized the same way as > PGDATA. Has anyone done any head-to-heads for WAL drive configuration > changes? That would be a "no", then. Looks like I have my work cut out for me ... -- -- Josh Berkus PostgreSQL Experts Inc. http://www.pgexperts.com