Received: from makus.postgresql.org ([98.129.198.125]) by malur.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1TLXro-0001yj-H7 for pgsql-performance@postgresql.org; Tue, 09 Oct 2012 11:20:52 +0000 Received: from mail-wi0-f178.google.com ([209.85.212.178]) by makus.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1TLXrn-0000QV-Bx for pgsql-performance@postgresql.org; Tue, 09 Oct 2012 11:20:51 +0000 Received: by mail-wi0-f178.google.com with SMTP id hr7so4947277wib.1 for ; Tue, 09 Oct 2012 04:20:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding; bh=EEPqUTDBYpbBx9r4ZWu8kdEpXE4DMNftACHTiICh7uY=; b=xTx/ndg35MNS2JNgePngHWOpl2gogzoSOy+A6WZ/Af4ItE+5wFyyunGGLJ4N52cJf8 +6HnWHcHhYljrdrV6Q1R/YG8AXOcDgEZ+1GL9KCae7qqHZ528lBFMMgXuBtsa7IE1PCO GzP2SHDx3UQaQ/H3W86Drq9B/R2c4eRyJZBbMvPC87U5+I96H7aZV+G58Yr0ncn6EoT0 H4yRUeslPTV5GKcbbxowOxDHSi1QP1b+aaB60a1ViF6HS7VM3NSC4HZv2Y63SbhYpGYv bmi1PaSdkwb5ZJprTZKkQKitK39bbaXGQCv3y1LlGM/CNaJ0cmNQ5S5o8qsomsis5607 1W8Q== Received: by 10.216.55.195 with SMTP id k45mr11286074wec.216.1349781650422; Tue, 09 Oct 2012 04:20:50 -0700 (PDT) Received: from [192.168.73.37] (5357DA75.cm-6-8d.dynamic.ziggo.nl. [83.87.218.117]) by mx.google.com with ESMTPS id f1sm24461085wiy.2.2012.10.09.04.20.48 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 09 Oct 2012 04:20:49 -0700 (PDT) Message-ID: <5074086E.8050504@gmail.com> Date: Tue, 09 Oct 2012 13:20:14 +0200 From: Yeb Havinga User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:14.0) Gecko/20120713 Thunderbird/14.0 MIME-Version: 1.0 To: Craig James CC: pgsql-performance@postgresql.org Subject: Re: Two identical systems, radically different performance References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Pg-Spam-Score: -2.6 (--) X-Archive-Number: 201210/80 X-Sequence-Number: 48039 On 2012-10-08 23:45, Craig James wrote: > This is driving me crazy. A new server, virtually identical to an old > one, has 50% of the performance with pgbench. I've checked everything > I can think of. > > The setups (call the servers "old" and "new"): > > old: 2 x 4-core Intel Xeon E5620 > new: 4 x 4-core Intel Xeon E5606 How are the filesystems formatted and mounted (-o nobarrier?) regards Yeb