Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1U7bRK-0006gm-Pp for pgsql-performance@arkaria.postgresql.org; Tue, 19 Feb 2013 00:52:10 +0000 Received: from localhost ([127.0.0.1] helo=postgresql.org) by malur.postgresql.org with smtp (Exim 4.72) (envelope-from ) id 1U7bRK-0000QW-A8 for pgsql-performance@arkaria.postgresql.org; Tue, 19 Feb 2013 00:52:10 +0000 Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29]) by malur.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1U7bRJ-0000QR-HX for pgsql-performance@postgresql.org; Tue, 19 Feb 2013 00:52:09 +0000 Received: from outmail149059.authsmtp.com ([62.13.149.59]) by magus.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1U7bRF-0000nI-C8 for pgsql-performance@postgresql.org; Tue, 19 Feb 2013 00:52:09 +0000 Received: from mail-c235.authsmtp.com (mail-c235.authsmtp.com [62.13.128.235]) by punt7.authsmtp.com (8.14.2/8.14.2/Kp) with ESMTP id r1J0q3qF064979; Tue, 19 Feb 2013 00:52:03 GMT Received: from [172.47.23.103] (70-36-143-10.dsl.dynamic.sonic.net [70.36.143.10]) (authenticated bits=0) by mail.authsmtp.com (8.14.2/8.14.2/) with ESMTP id r1J0pwVm016551; Tue, 19 Feb 2013 00:51:59 GMT Message-ID: <5122CCA6.7070904@agliodbs.com> Date: Mon, 18 Feb 2013 16:51:50 -0800 From: Josh Berkus Organization: PostgreSQL Experts Inc. User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130106 Thunderbird/17.0.2 MIME-Version: 1.0 To: Jon Nelson CC: Scott Marlowe , postgres performance list Subject: Re: High CPU usage / load average after upgrading to Ubuntu 12.04 References: <60B572D9298D944580F7D51195DD30804357FA4ABF@VMBX125.ihostexchange.net> <60B572D9298D944580F7D51195DD30804357FA4B60@VMBX125.ihostexchange.net> <60B572D9298D944580F7D51195DD30804357FA4C11@VMBX125.ihostexchange.net> <511BE879.8080706@agliodbs.com> <511C2F10.3080409@agliodbs.com> <60B572D9298D944580F7D51195DD30804357FA4DE2@VMBX125.ihostexchange.net> <511D2F11.6040706@agliodbs.com> <60B572D9298D944580F7D51195DD308043580CAA0B@VMBX125.ihostexchange.net> <511D79FE.7060705@agliodbs.com> <60B572D9298D944580F7D51195DD308043580CAA87@VMBX125.ihostexchange.net> <511E7DC0.4090506@agliodbs.com> <5122C507.7060303@agliodbs.com> <5122C9D9.9040909@agliodbs.com> In-Reply-To: X-Enigmail-Version: 1.5 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Server-Quench: 91c11c83-7a2e-11e2-b5c5-002590a15da7 X-AuthReport-Spam: If SPAM / abuse - report it at: http://www.authsmtp.com/abuse X-AuthRoute: OCdyZgscClZXSx8a IioLCC5HRQ8+YBZL BAkGMA9GIUINWEQK c1ADfx19PVdbHwkA AHYLW15RUldxWS1y axRSaxtcZklQXgV1 UktWQhwQFX9oQVtn Wx4fVBx3dktAeX51 K09jDXFaD0x5aEEs QBtJFGxTZ3oybTMa TUBYdQZdcFJLe0sU bR4dAXkdCgVyBAwf JSoGdxAwMjUXAxxo ChwWJF0fCQFDGjk1 S1gLAzg1FEIIDyw9 MxE8YkMEE1wYPkQ0 PhM9XholOQIUFhA8 VxgXRncFT/H/ X-Authentic-SMTP: 61633136333939.1023:706 X-AuthFastPath: 0 (Was 255) X-AuthSMTP-Origin: 70.36.143.10/23 X-AuthVirus-Status: No virus detected - but ensure you scan with your own anti-virus system. X-Pg-Spam-Score: -2.6 (--) List-Archive: List-Help: List-ID: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: X-Mailing-List: pgsql-performance Precedence: bulk Sender: pgsql-performance-owner@postgresql.org > Did you try turning barriers on or off *manually* (explicitly)? With > LSI and barriers *on* and ext4 I had less-optimal performance. With > Linux MD or (some) 3Ware configurations I had no performance hit. They're off in fstab. /dev/sdd1 on /data type xfs (rw,noatime,nodiratime,nobarrier) -- Josh Berkus PostgreSQL Experts Inc. http://pgexperts.com -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance