X-Original-To: pgsql-performance-postgresql.org@postgresql.org Received: from localhost (mx1.hub.org [200.46.208.251]) by postgresql.org (Postfix) with ESMTP id 243149FB27F for ; Fri, 28 Jul 2006 16:24:16 -0300 (ADT) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.208.251]) (amavisd-new, port 10024) with ESMTP id 77348-06 for ; Fri, 28 Jul 2006 16:24:05 -0300 (ADT) X-Greylist: from auto-whitelisted by SQLgrey- Received: from mail.Mi8.com (d01gw01.mi8.com [63.240.6.47]) by postgresql.org (Postfix) with ESMTP id 688609FB282 for ; Fri, 28 Jul 2006 16:24:05 -0300 (ADT) Received: from 172.16.1.112 by mail.Mi8.com with ESMTP (- Welcome to Mi8 Corporation www.Mi8.com (D1)); Fri, 28 Jul 2006 15:22:31 -0400 X-Server-Uuid: 241911D6-425B-44B9-A073-E3FE0F8FC774 Received: from MI8NYCMAIL06.Mi8.com ([172.16.1.160]) by D01SMTP02.Mi8.com with Microsoft SMTPSVC(6.0.3790.1830); Fri, 28 Jul 2006 15:22:31 -0400 Received: from 63.80.24.130 ([63.80.24.130]) by MI8NYCMAIL06.Mi8.com ( [172.16.1.219]) via Exchange Front-End Server mi8owa.mi8.com ( [172.16.1.108]) with Microsoft Exchange Server HTTP-DAV ; Fri, 28 Jul 2006 19:22:30 +0000 User-Agent: Microsoft-Entourage/11.2.5.060620 Date: Fri, 28 Jul 2006 12:22:28 -0700 Subject: Re: Performance with 2 AMD/Opteron 2.6Ghz and 8gig From: "Luke Lonergan" To: "Jeff Trout" cc: "Mikael Carneholm" , "Kjell Tore Fossbakk" , pgsql-performance@postgresql.org Message-ID: Thread-Topic: [PERFORM] Performance with 2 AMD/Opteron 2.6Ghz and 8gig Thread-Index: AcayeynhaJqD/x5uEdu8sgAWy4o9DA== In-Reply-To: <7A073C1C-BB04-42C7-A7B9-D25A18DB27D0@torgo.978.org> MIME-Version: 1.0 X-OriginalArrivalTime: 28 Jul 2006 19:22:31.0274 (UTC) FILETIME=[2BD504A0:01C6B27B] X-WSS-ID: 68D4BC7F3NC161733-04-01 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=1.55 tagged_above=0 required=5 tests=AWL, RCVD_NUMERIC_HELO X-Spam-Level: * X-Archive-Number: 200607/272 X-Sequence-Number: 20132 Jeff, On 7/28/06 10:31 AM, "Jeff Trout" wrote: > I'm still not sure about that software 10 read number. something is > not right there... It's very consistent with what we've seen before - the hardware RAID controller doesn't do JBOD with SCSI command queuing like a simple SCSI controller would do. The Smart Array 6402 makes a very bad SCSI controller for software RAID. The hardware results look very good - seems like the 2.6.17 linux kernel has a drastically improved CCISS driver as compared to what I've previously seen. - Luke