Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1ULag3-0003dN-NV for pgsql-performance@arkaria.postgresql.org; Fri, 29 Mar 2013 14:53:11 +0000 Received: from localhost ([127.0.0.1] helo=postgresql.org) by malur.postgresql.org with smtp (Exim 4.72) (envelope-from ) id 1ULag3-0003Ut-8Q for pgsql-performance@arkaria.postgresql.org; Fri, 29 Mar 2013 14:53:11 +0000 Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29]) by malur.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1ULag2-0003Ue-GA for pgsql-performance@postgresql.org; Fri, 29 Mar 2013 14:53:10 +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 1ULafu-0006i0-Uc for pgsql-performance@postgresql.org; Fri, 29 Mar 2013 14:53:10 +0000 Received: from localhost (localhost [127.0.0.1]) by mail.opinioni.net (Postfix) with ESMTP id 88F515C00C9 for ; Fri, 29 Mar 2013 15:54:46 +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 qScdrDtcomhp for ; Fri, 29 Mar 2013 15:54:46 +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 B2CC35C011A for ; Fri, 29 Mar 2013 15:54:45 +0100 (CET) Message-ID: <5155AAC7.50407@opinioni.net> Date: Fri, 29 Mar 2013 15:52:55 +0100 From: Andrea Suisani User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130308 Thunderbird/17.0.4 MIME-Version: 1.0 To: pgsql-performance@postgresql.org Subject: Re: [OT] linux 3.10 kernel will improve ipc,sysv semaphore scalability References: <51519CE9.1070409@opinioni.net> <5151F026.5010409@optionshouse.com> In-Reply-To: <5151F026.5010409@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 Hi On 03/26/2013 07:59 PM, Shaun Thomas wrote: > On 03/26/2013 08:04 AM, Andrea Suisani wrote: > >> TPS: >> 100 users: 1257.21 (vanilla) 2805.06 (v3 patchset) >> 400 users: 1437.57 (vanilla) 2664.67 (v3 patchset) >> 800 users: 1236.89 (vanilla) 2750.73 (v3 patchset) > > Wow, I like the look of that. Me too. > I wonder how this reacts with disabled autogrouping and increasing > sched_migration_cost. If the completely fair scheduler has less locking > contention with this patch-set, those tweaks may not even be necessary. > I need to see if I can find a system to test on. Yep, I'm eager to test it too, but unfortunately I have no spare server to use. Probably early next I'll test it on my workstation. Andrea -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance