Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1YfvIB-0000jP-NB for pgsql-performance@arkaria.postgresql.org; Wed, 08 Apr 2015 19:05:39 +0000 Received: from localhost ([127.0.0.1] helo=postgresql.org) by malur.postgresql.org with smtp (Exim 4.80) (envelope-from ) id 1YfvIA-0004LI-Kn for pgsql-performance@arkaria.postgresql.org; Wed, 08 Apr 2015 19:05:38 +0000 Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29]) by malur.postgresql.org with esmtps (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1YfvI9-0004LB-Fj for pgsql-performance@postgresql.org; Wed, 08 Apr 2015 19:05:37 +0000 Received: from mx-out.zmailcloud.com ([192.198.85.98] helo=mx-out-1.zmailcloud.com) by magus.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1YfvI4-0005BG-Ii for pgsql-performance@postgresql.org; Wed, 08 Apr 2015 19:05:36 +0000 Received: from smtp.01.com (smtp.01.com [10.10.0.43]) by mx-out-1.zmailcloud.com (Postfix) with ESMTP id 1328D564147; Wed, 8 Apr 2015 14:05:25 -0500 (CDT) Received: from localhost (localhost [127.0.0.1]) by smtp-out-2.01.com (Postfix) with ESMTP id 0281060264; Wed, 8 Apr 2015 14:05:25 -0500 (CDT) X-Virus-Scanned: amavisd-new at smtp-out-2.01.com Received: from smtp.01.com ([127.0.0.1]) by localhost (smtp-out-2.01.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id i9OBgoagXbWv; Wed, 8 Apr 2015 14:05:24 -0500 (CDT) Received: from smtp.01.com (localhost [127.0.0.1]) by smtp-out-2.01.com (Postfix) with ESMTP id C646D6035F; Wed, 8 Apr 2015 14:05:24 -0500 (CDT) Received: from localhost (localhost [127.0.0.1]) by smtp-out-2.01.com (Postfix) with ESMTP id AF4B860315; Wed, 8 Apr 2015 14:05:24 -0500 (CDT) X-Virus-Scanned: amavisd-new at smtp-out-2.01.com Received: from smtp.01.com ([127.0.0.1]) by localhost (smtp-out-2.01.com [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id HRcIPEYCK8_M; Wed, 8 Apr 2015 14:05:24 -0500 (CDT) Received: from [172.47.23.104] (50-0-89-53.dsl.dynamic.fusionbroadband.com [50.0.89.53]) by smtp-out-2.01.com (Postfix) with ESMTPSA id C53F760264; Wed, 8 Apr 2015 14:05:23 -0500 (CDT) Message-ID: <55257BEF.1010101@agliodbs.com> Date: Wed, 08 Apr 2015 12:05:19 -0700 From: Josh Berkus Organization: PostgreSQL Experts Inc. User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 MIME-Version: 1.0 To: Mel Llaguno , =?UTF-8?B?UHJ6ZW15c8WCYXcgRGXEhw==?= CC: "pgsql-performance@postgresql.org" Subject: Re: Some performance testing? References: <551AFB01.50309@agliodbs.com> <5522F1DF.8090204@agliodbs.com> <552416D6.2040108@agliodbs.com> In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Pg-Spam-Score: -1.9 (-) 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 04/07/2015 11:07 AM, Mel Llaguno wrote: > Care to elaborate? We usually do not recommend specific kernel versions > for our customers (who run on a variety of distributions). Thanks, M. You should. http://www.databasesoup.com/2014/09/why-you-need-to-avoid-linux-kernel-32.html Performance is literally 2X to 5X different between kernels. -- 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