Received: from maia.hub.org (maia-5.hub.org [200.46.204.29]) by mail.postgresql.org (Postfix) with ESMTP id E893E632319 for ; Fri, 13 Aug 2010 15:41:46 -0300 (ADT) Received: from mail.postgresql.org ([200.46.204.86]) by maia.hub.org (mx1.hub.org [200.46.204.29]) (amavisd-maia, port 10024) with ESMTP id 35733-06 for ; Fri, 13 Aug 2010 18:41:39 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from moutng.kundenserver.de (moutng.kundenserver.de [212.227.126.171]) by mail.postgresql.org (Postfix) with ESMTP id 8F0BF6328F4 for ; Fri, 13 Aug 2010 15:41:39 -0300 (ADT) Received: from [192.168.1.151] (static-71-179-240-8.bltmmd.fios.verizon.net [71.179.240.8]) by mrelayeu.kundenserver.de (node=mrbap2) with ESMTP (Nemesis) id 0LlYpT-1PIE5F31df-00agHy; Fri, 13 Aug 2010 20:41:31 +0200 Message-ID: <4C6591D9.1080206@2ndquadrant.com> Date: Fri, 13 Aug 2010 14:41:29 -0400 From: Greg Smith User-Agent: Thunderbird 2.0.0.24 (X11/20100317) MIME-Version: 1.0 To: Bruce Momjian CC: Kenneth Cox , pgsql-performance@postgresql.org Subject: Re: Advice configuring ServeRAID 8k for performance References: <201008131817.o7DIH1b03550@momjian.us> In-Reply-To: <201008131817.o7DIH1b03550@momjian.us> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Provags-ID: V02:K0:3xyHca7m/Mtbq+iEwRa2vsgw/da1/mHlVXZZQHH1ZOt AIowh0POQNmTQEOkfYi6ju/tyKhDPOvJ6E0HJouusDvfIJdq9E 3+QRQfku4aHJr0LFL7VL0pqjQvU4iJ1VCDpxvo6C5KpELXWbbB LOc+DV9X5hmNKKR6Wb0e19vnhTcW1wXopNAiThrRLJkDAf/wZB +xW8i2m9L/KjkBoTDt0eDQ4X2dyJzq+etw+K+UoVe8= 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, RCVD_IN_DNSWL_NONE=-0.0001 X-Spam-Level: X-Archive-Number: 201008/155 X-Sequence-Number: 39998 Bruce Momjian wrote: > We recomment 'data=writeback' for ext3 in our docs > Only for the WAL though, which is fine, and I think spelled out clearly enough in the doc section you quoted. Ken's system has one big RAID volume, which means he'd be mounting the data files with 'writeback' too; that's the thing to avoid. -- Greg Smith 2ndQuadrant US Baltimore, MD PostgreSQL Training, Services and Support greg@2ndQuadrant.com www.2ndQuadrant.us