Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1TsauY-0003F5-Hy for pgsql-performance@arkaria.postgresql.org; Tue, 08 Jan 2013 15:16:18 +0000 Received: from localhost ([127.0.0.1] helo=postgresql.org) by malur.postgresql.org with smtp (Exim 4.72) (envelope-from ) id 1TsauY-00007J-2v for pgsql-performance@arkaria.postgresql.org; Tue, 08 Jan 2013 15:16:18 +0000 Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29]) by malur.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1TsauX-00007E-CV for pgsql-performance@postgresql.org; Tue, 08 Jan 2013 15:16:17 +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 1TsauV-0007sD-4f for pgsql-performance@postgresql.org; Tue, 08 Jan 2013 15:16:17 +0000 Received: from localhost (localhost [127.0.0.1]) by mail.opinioni.net (Postfix) with ESMTP id 6B98D535276 for ; Tue, 8 Jan 2013 16:28:04 +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 RwISn2l+XGFz for ; Tue, 8 Jan 2013 16:28:04 +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 402465350D3 for ; Tue, 8 Jan 2013 16:28:04 +0100 (CET) Message-ID: <50EC383C.1060604@opinioni.net> Date: Tue, 08 Jan 2013 16:16:12 +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: "pgsql-performance@postgresql.org" Subject: Re: Two Necessary Kernel Tweaks for Linux Systems References: <50E4AAB1.9040902@optionshouse.com> <50EBD907.2060309@opinioni.net> In-Reply-To: <50EBD907.2060309@opinioni.net> 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 01/08/2013 09:29 AM, Andrea Suisani wrote: > 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! 12.5% sorry for the typo... > 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