Received: from maia.hub.org (maia-5.hub.org [200.46.204.29]) by mail.postgresql.org (Postfix) with ESMTP id 8A3586877AC for ; Tue, 22 Jun 2010 11:40:48 -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 33764-03 for ; Tue, 22 Jun 2010 14:40:41 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from moutng.kundenserver.de (moutng.kundenserver.de [212.227.17.8]) by mail.postgresql.org (Postfix) with ESMTP id 3AF7C6877AF for ; Tue, 22 Jun 2010 11:40:39 -0300 (ADT) Received: from [75.197.39.254] (254.sub-75-197-39.myvzw.com [75.197.39.254]) by mrelayeu.kundenserver.de (node=mreu1) with ESMTP (Nemesis) id 0M5tBF-1POXxz2Y1Z-00yKnK; Tue, 22 Jun 2010 16:40:35 +0200 Message-ID: <4C20CB5F.2030000@2ndquadrant.com> Date: Tue, 22 Jun 2010 10:40:31 -0400 From: Greg Smith User-Agent: Thunderbird 2.0.0.24 (X11/20100317) MIME-Version: 1.0 To: =?UTF-8?B?R3J6ZWdvcnogSmHFm2tpZXdpY3o=?= CC: postgres performance list Subject: Re: raid10 write performance References: In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Provags-ID: V01U2FsdGVkX1/h4Fyl3+QQ200EUXcp71Nc3gEktgtDPKNvdWF 8YYZ+Le0EcYzUwOsPSLwgIwKcgMoYHnTyIrn0aJkP6pZsb6hyV cVMsNVe59sp+mDhBdSJFbmdVx+8rWnL X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=0.8 tagged_above=-10 required=5 tests=BAYES_50=0.8, RCVD_IN_DNSWL_NONE=-0.0001 X-Spam-Level: X-Archive-Number: 201006/375 X-Sequence-Number: 39231 Grzegorz Jaśkiewicz wrote: > raid: serveRAID M5014 SAS/SATA controller > Do the "performant servers" have a different RAID card? This one has terrible performance, and could alone be the source of your issue. The ServeRAID cards are slow in general, and certainly slow running RAID10. -- Greg Smith 2ndQuadrant US Baltimore, MD PostgreSQL Training, Services and Support greg@2ndQuadrant.com www.2ndQuadrant.us