X-Original-To: pgsql-performance-postgresql.org@localhost.postgresql.org Received: from localhost (unknown [200.46.204.144]) by svr1.postgresql.org (Postfix) with ESMTP id 7B16E5281E for ; Thu, 19 May 2005 16:56:18 -0300 (ADT) 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 56621-01 for ; Thu, 19 May 2005 19:56:09 +0000 (GMT) Received: from davinci.ethosmedia.com (server227.ethosmedia.com [209.128.84.227]) by svr1.postgresql.org (Postfix) with ESMTP id CF00F52807 for ; Thu, 19 May 2005 16:56:07 -0300 (ADT) X-EthosMedia-Virus-Scanned: no infections found Received: from [64.81.245.111] (account josh@agliodbs.com HELO temoku.sf.agliodbs.com) by davinci.ethosmedia.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 7382786; Thu, 19 May 2005 12:58:22 -0700 From: Josh Berkus Reply-To: josh@agliodbs.com Organization: Aglio Database Solutions To: "Anjan Dave" Subject: Re: PostgreSQL strugling during high load Date: Thu, 19 May 2005 12:57:44 -0700 User-Agent: KMail/1.7.1 Cc: "Donald Courtney" , "Tom Lane" , pgsql-performance@postgresql.org References: <4BAFBB6B9CC46F41B2AD7D9F4BBAF785098A32@vt-pe2550-001.vantage.vantage.com> In-Reply-To: <4BAFBB6B9CC46F41B2AD7D9F4BBAF785098A32@vt-pe2550-001.vantage.vantage.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200505191257.44874.josh@agliodbs.com> X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, hits=0.046 tagged_above=0 required=5 tests=AWL, FORGED_RCVD_HELO X-Spam-Level: X-Archive-Number: 200505/323 X-Sequence-Number: 12487 Anjan, > As far as disk I/O is concerned for flushing the buffers out, I am not > ruling out the combination of Dell PERC4 RAID card, and the RH AS 3.0 > Update3 being a problem. You know that Update4 is out, yes? Update3 is currenly throttling your I/O by about 50%. -- --Josh Josh Berkus Aglio Database Solutions San Francisco