Received: from maia.hub.org (maia-5.hub.org [200.46.204.29]) by mail.postgresql.org (Postfix) with ESMTP id 2E34A6324C0 for ; Thu, 5 Aug 2010 20:00:31 -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 25673-01 for ; Thu, 5 Aug 2010 23:00:24 +0000 (UTC) X-Greylist: delayed 00:07:52.948461 by SQLgrey-1.7.6 Received: from mail-qy0-f181.google.com (mail-qy0-f181.google.com [209.85.216.181]) by mail.postgresql.org (Postfix) with ESMTP id E60046322FF for ; Thu, 5 Aug 2010 20:00:23 -0300 (ADT) Received: by qyk7 with SMTP id 7so3260310qyk.19 for ; Thu, 05 Aug 2010 16:00:22 -0700 (PDT) Received: by 10.224.105.4 with SMTP id r4mr5393599qao.83.1281048749562; Thu, 05 Aug 2010 15:52:29 -0700 (PDT) Received: from Craig-Jamess-MacBook-Pro.local (wsip-70-167-124-126.sd.sd.cox.net [70.167.124.126]) by mx.google.com with ESMTPS id t19sm847340qco.3.2010.08.05.15.52.28 (version=SSLv3 cipher=RC4-MD5); Thu, 05 Aug 2010 15:52:29 -0700 (PDT) Message-ID: <4C5B40AA.3060500@emolecules.com> Date: Thu, 05 Aug 2010 15:52:26 -0700 From: Craig James User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.1.11) Gecko/20100711 Thunderbird/3.0.6 MIME-Version: 1.0 To: pgsql-performance@postgresql.org Subject: Re: Advice configuring ServeRAID 8k for performance References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=-0.001 tagged_above=-10 required=5 tests=BAYES_40=-0.001, RCVD_IN_DNSWL_NONE=-0.0001 X-Spam-Level: X-Archive-Number: 201008/78 X-Sequence-Number: 39921 On 8/5/10 11:28 AM, Kenneth Cox wrote: > I am using PostgreSQL 8.3.7 on a dedicated IBM 3660 with 24GB RAM > running CentOS 5.4 x86_64. I have a ServeRAID 8k controller with 6 SATA > 7500RPM disks in RAID 6, and for the OLAP workload it feels* slow.... > My current performance is 85MB/s write, 151 MB/s reads I get 193MB/sec write and 450MB/sec read on a RAID10 on 8 SATA 7200 RPM disks. RAID10 seems to scale linearly -- add disks, get more speed, to the limit of your controller. Craig