Received: from localhost (maia-4.hub.org [200.46.204.183]) by postgresql.org (Postfix) with ESMTP id 34F2A9FC36D for ; Fri, 23 Feb 2007 17:27:53 -0400 (AST) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.204.183]) (amavisd-new, port 10024) with ESMTP id 55404-01 for ; Fri, 23 Feb 2007 17:27:50 -0400 (AST) X-Greylist: from auto-whitelisted by SQLgrey-1.7.4 Received: from davinci.ethosmedia.com (server227.ethosmedia.com [209.128.84.227]) by postgresql.org (Postfix) with ESMTP id 030519FC16E for ; Fri, 23 Feb 2007 17:27:49 -0400 (AST) X-EthosMedia-Virus-Scanned: no infections found Received: from [64.81.245.111] (account josh@agliodbs.com HELO [192.168.1.27]) by davinci.ethosmedia.com (CommuniGate Pro SMTP 4.1.8) with ESMTP-TLS id 11501309; Fri, 23 Feb 2007 13:31:45 -0800 From: Josh Berkus Reply-To: josh@agliodbs.com Organization: Aglio Database Solutions To: pgsql-performance@postgresql.org Subject: Re: which Xeon processors don't have the context switching problem Date: Fri, 23 Feb 2007 13:30:56 -0800 User-Agent: KMail/1.8 Cc: Geoffrey References: <45DF3B15.1070609@3times25.net> In-Reply-To: <45DF3B15.1070609@3times25.net> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200702231330.57014.josh@agliodbs.com> X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200702/260 X-Sequence-Number: 23314 Geoffrey, > I recall a reference on the list indicating that newer Xeon processors > don't suffer from the context switching problem reported last year. Just to be clear, it's a software problem which affects all architectures, including AMD and Sparc. It's just *worse* on the PIII and P4 generation Xeons. -- --Josh Josh Berkus PostgreSQL @ Sun San Francisco