Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1UctqJ-0006km-QB for pgsql-performance@arkaria.postgresql.org; Thu, 16 May 2013 08:47:19 +0000 Received: from localhost ([127.0.0.1] helo=postgresql.org) by malur.postgresql.org with smtp (Exim 4.72) (envelope-from ) id 1UctqJ-0004gz-9o for pgsql-performance@arkaria.postgresql.org; Thu, 16 May 2013 08:47:19 +0000 Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29]) by malur.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1UctqH-0004fz-Kc for pgsql-performance@postgresql.org; Thu, 16 May 2013 08:47:17 +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 1UctqA-00081Y-Hd for pgsql-performance@postgresql.org; Thu, 16 May 2013 08:47:17 +0000 Received: from localhost (localhost [127.0.0.1]) by mail.opinioni.net (Postfix) with ESMTP id 7D9DEA2975; Thu, 16 May 2013 10:54:00 +0200 (CEST) Received: from mail.opinioni.net ([127.0.0.1]) by localhost (opinioni.net [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id uG709kjYPWAZ; Thu, 16 May 2013 10:54:00 +0200 (CEST) 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 4B5A86B6B; Thu, 16 May 2013 10:54:00 +0200 (CEST) Message-ID: <51949D0B.6030000@opinioni.net> Date: Thu, 16 May 2013 10:47:07 +0200 From: Andrea Suisani User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130510 Thunderbird/17.0.6 MIME-Version: 1.0 To: sthomas@optionshouse.com CC: "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 all, 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. 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. > still no time to do proper testing but I just want to inform that the patchset actually went in the 3.10 first release candidate, as we can see from git log :) git log v3.9..v3.10-rc1 --grep="ipc,sem: fine grained locking for semtimedop" -- ipc/sem.c commit 6062a8dc0517bce23e3c2f7d2fea5e22411269a3 Author: Rik van Riel Date: Tue Apr 30 19:15:44 2013 -0700 ipc,sem: fine grained locking for semtimedop ... -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance