Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1TsUZT-0005Nz-2l for pgsql-performance@arkaria.postgresql.org; Tue, 08 Jan 2013 08:30:07 +0000 Received: from localhost ([127.0.0.1] helo=postgresql.org) by malur.postgresql.org with smtp (Exim 4.72) (envelope-from ) id 1TsUZS-0004IH-2o for pgsql-performance@arkaria.postgresql.org; Tue, 08 Jan 2013 08:30:06 +0000 Received: from magus.postgresql.org ([87.238.57.229]) by malur.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1TsUZR-0004Gz-1x for pgsql-performance@postgresql.org; Tue, 08 Jan 2013 08:30:05 +0000 Received: from host36.ns3.it ([80.79.54.36] helo=mail.opinioni.net) by magus.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1TsUZN-0001fM-RZ for pgsql-performance@postgresql.org; Tue, 08 Jan 2013 08:30:04 +0000 Received: from localhost (localhost [127.0.0.1]) by mail.opinioni.net (Postfix) with ESMTP id DCD525327A2; Tue, 8 Jan 2013 09:41:48 +0100 (CET) Received: from mail.opinioni.net ([127.0.0.1]) by localhost (opinioni.net [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id E9HuzSmtFN7d; Tue, 8 Jan 2013 09:41:48 +0100 (CET) Received: from [192.168.1.50] (78-134-6-72.v4.ngi.it [78.134.6.72]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.opinioni.net (Postfix) with ESMTPS id 9F2BE5327A4; Tue, 8 Jan 2013 09:41:48 +0100 (CET) Message-ID: <50EBD907.2060309@opinioni.net> Date: Tue, 08 Jan 2013 09:29:59 +0100 From: Andrea Suisani User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/17.0 Thunderbird/17.0 MIME-Version: 1.0 To: sthomas@optionshouse.com CC: "pgsql-performance@postgresql.org" Subject: Re: Two Necessary Kernel Tweaks for Linux Systems References: <50E4AAB1.9040902@optionshouse.com> In-Reply-To: <50E4AAB1.9040902@optionshouse.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed 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 01/02/2013 10:46 PM, Shaun Thomas wrote: > Hey everyone! > > After much testing and hair-pulling, we've confirmed two kernel settings that > should always be modified in production Linux systems. Especially new ones with > the completely fair scheduler (CFS) as opposed to the O(1) scheduler. [cut] > I just figured I'd share, since we found this info so beneficial. I just want to confirm that on our relatively small test server that tweaks give us a 25% performance boost! Really appreciated Shaun. thanks Andrea -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance