Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1U5hwo-000727-Bw for pgsql-performance@arkaria.postgresql.org; Wed, 13 Feb 2013 19:24:50 +0000 Received: from localhost ([127.0.0.1] helo=postgresql.org) by malur.postgresql.org with smtp (Exim 4.72) (envelope-from ) id 1U5hwn-0005I5-Rw for pgsql-performance@arkaria.postgresql.org; Wed, 13 Feb 2013 19:24:49 +0000 Received: from makus.postgresql.org ([2001:4800:7903:4::125]) by malur.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1U5hwn-0005I0-28 for pgsql-performance@postgresql.org; Wed, 13 Feb 2013 19:24:49 +0000 Received: from outmail149108.authsmtp.net ([62.13.149.108]) by makus.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1U5hwl-0003DU-94 for pgsql-performance@postgresql.org; Wed, 13 Feb 2013 19:24:48 +0000 Received: from mail-c232.authsmtp.com (mail-c232.authsmtp.com [62.13.128.232]) by punt6.authsmtp.com (8.14.2/8.14.2/Kp) with ESMTP id r1DJOjGw094881 for ; Wed, 13 Feb 2013 19:24:45 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 r1DJOfM7066350 for ; Wed, 13 Feb 2013 19:24:42 GMT Message-ID: <511BE879.8080706@agliodbs.com> Date: Wed, 13 Feb 2013 11:24:41 -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: pgsql-performance@postgresql.org 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> In-Reply-To: <60B572D9298D944580F7D51195DD30804357FA4C11@VMBX125.ihostexchange.net> X-Enigmail-Version: 1.5 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Server-Quench: 04e73c18-7613-11e2-b10b-0025903375e2 X-AuthReport-Spam: If SPAM / abuse - report it at: http://www.authsmtp.com/abuse X-AuthRoute: OCdyZgscClZXSx8a IioLCC5HRQ8+YBZL BAkbIhBDJB8RWB5f NVxfJ1xYPXUEQkpF VCReGBUITgIzDi10 aBUnOFdCYEpPXBVr WUJLRlhWF0tvAQIC AAAfVhpsdgVZen1v ZQggXwQhIxIHckZ7 RE1RFSMHY2RpJmAb BUdbJAJcbQRMfxxY a1EqVm5fYGVVe3pg RVJiZ2tqYmhScjJv T1NFHmo/e2gsJBsJ DzADEjVnNnU4Dzgo JhMrYhlUGEEYPg07 L1Y7UF0VexYcFgBE V1xVDzVQK1gHSGI3 CktnV1MYDCA/CX4G REV0SgAA X-Authentic-SMTP: 61633136333939.1019:706 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 On 02/12/2013 05:28 PM, Dan Kogan wrote: > Hi Will, > > Yes, I think we've seen some discussions on that. Our servers our hosted on Amazon Ec2 and upgrading the kernel does not seem so straight forward. > We did a benchmark using pgbench on 3.5 vs 3.2 and saw an improvement. Unfortunately our production server would not boot off 3.5 so we had to revert back to 3.2. > > At this point we are contemplating whether it's better to go back to 11.04 or upgrade to 12.10 (which comes with kernel version 3.5). > Any thoughts on that would be appreciated. I have a machine running the same version of Ubuntu. I'll run some tests and tell you what I find. -- 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