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 A00839FB1E0 for ; Fri, 15 Sep 2006 07:10:15 -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 45889-08 for ; Fri, 15 Sep 2006 07:10:08 -0300 (ADT) X-Greylist: domain auto-whitelisted by SQLgrey- Received: from wx-out-0506.google.com (wx-out-0506.google.com [66.249.82.238]) by postgresql.org (Postfix) with ESMTP id 52FF89F9ECF for ; Fri, 15 Sep 2006 07:10:07 -0300 (ADT) Received: by wx-out-0506.google.com with SMTP id t13so3174958wxc for ; Fri, 15 Sep 2006 03:10:06 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=Oh/DNqJcVht95kdW1wyb54mJXrFLNrqK5egbIAeXgGzKAirXwOI4WtuJ6tfsIZGaLqJGcs0kLqo2wOksfAZTroqD772E3KR7fAaFzkGVnW7fmwNKFVZ/Vwc7O1+dfxocWNTbF4yBjDDnK+Ge3ixhZ+eicLN/8TR9M40SUQk+Ca4= Received: by 10.90.49.20 with SMTP id w20mr3610384agw; Fri, 15 Sep 2006 03:10:06 -0700 (PDT) Received: by 10.90.36.2 with HTTP; Fri, 15 Sep 2006 03:10:06 -0700 (PDT) Message-ID: <1d4e0c10609150310i740c20acv3407485dc362dbed@mail.gmail.com> Date: Fri, 15 Sep 2006 12:10:06 +0200 From: "Guillaume Smet" To: "Markus Schaber" Subject: Re: High CPU Load Cc: pgsql-performance@postgresql.org In-Reply-To: <450A75DE.6050102@logix-tt.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <1158239339.5226.17.camel@localhost.localdomain> <450A75DE.6050102@logix-tt.com> X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=0.282 tagged_above=0 required=5 tests=AWL, DNS_FROM_RFC_ABUSE, SPF_PASS X-Spam-Level: X-Archive-Number: 200609/202 X-Sequence-Number: 20888 On 9/15/06, Markus Schaber wrote: > For xeons, there were rumours about "context switch storms" which kill > performance. It's not that much a problem in 8.1. There are a few corner cases when you still have the problem but on a regular load you don't have it anymore (validated here with a quad Xeon MP and a dual Xeon). -- Guillaume