X-Original-To: pgsql-sql-postgresql.org@localhost.postgresql.org Received: from localhost (unknown [200.46.204.144]) by svr1.postgresql.org (Postfix) with ESMTP id F0E865321A for ; Fri, 8 Apr 2005 21:43:02 +0100 (BST) Received: from svr1.postgresql.org ([200.46.204.71]) by localhost (av.hub.org [200.46.204.144]) (amavisd-new, port 10024) with ESMTP id 37296-10 for ; Fri, 8 Apr 2005 20:42:57 +0000 (GMT) Received: from koolancexeon.g2switchworks.com (mail.g2switchworks.com [63.87.162.25]) by svr1.postgresql.org (Postfix) with ESMTP id A518D53622 for ; Fri, 8 Apr 2005 21:42:55 +0100 (BST) Received: mail.g2switchworks.com 10.10.1.8 from 10.10.1.37 10.10.1.37 via HTTP with MS-WebStorage 6.5.6944 Received: from state.g2switchworks.com by mail.g2switchworks.com; 08 Apr 2005 15:42:57 -0500 Subject: Re: getting count for a specific querry From: Scott Marlowe To: Vivek Khera Cc: pgsql-sql@postgresql.org In-Reply-To: <7501ca328bf49eaf7990583fa6f598bf@khera.org> References: <003b01c53c70$6ff184b0$797ba8c0@jfradkin> <1112992262.20921.81.camel@state.g2switchworks.com> <7501ca328bf49eaf7990583fa6f598bf@khera.org> Content-Type: text/plain Content-Transfer-Encoding: 7bit Message-Id: <1112992977.20921.86.camel@state.g2switchworks.com> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.6 (1.4.6-2) Date: Fri, 08 Apr 2005 15:42:57 -0500 X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, hits=0.003 tagged_above=0 required=5 tests=AWL X-Spam-Level: X-Archive-Number: 200504/125 X-Sequence-Number: 21018 On Fri, 2005-04-08 at 15:36, Vivek Khera wrote: > On Apr 8, 2005, at 4:31 PM, Scott Marlowe wrote: > > > Note that there are several different RAID controllers you can get with > > a DELL. I had good luck with the PERC 4C (AMI MegaRAID based) at my > > > > I've had bad luck regarding speed with *all* of them, AMI MegaRAID and > Adaptec based ones, under high load. Under moderate to low load > they're acceptable. Were you using battery backed cache with write-back enabled on the 4C? The 3C is also megaraid based, but it a pretty old design and not very fast.