Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1XI3Rs-00080M-04 for pgsql-performance@arkaria.postgresql.org; Thu, 14 Aug 2014 22:24:44 +0000 Received: from localhost ([127.0.0.1] helo=postgresql.org) by malur.postgresql.org with smtp (Exim 4.80) (envelope-from ) id 1XI3Rr-0002OR-GO for pgsql-performance@arkaria.postgresql.org; Thu, 14 Aug 2014 22:24:43 +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 1XI3Rq-0002OK-E0 for pgsql-performance@postgresql.org; Thu, 14 Aug 2014 22:24:42 +0000 Received: from [2404:130:0:10::40:2] (helo=mail.catalyst.net.nz) by magus.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1XI3Rl-00067O-Oo for pgsql-performance@postgresql.org; Thu, 14 Aug 2014 22:24:41 +0000 Received: from localhost (localhost [127.0.0.1]) by mail.catalyst.net.nz (Postfix) with ESMTP id 21FA532551 for ; Fri, 15 Aug 2014 10:24:32 +1200 (NZST) X-Virus-Scanned: Debian amavisd-new at catalyst.net.nz Received: from mail.catalyst.net.nz ([127.0.0.1]) by localhost (bertrand.catalyst.net.nz [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id YuICPsW+d6m3 for ; Fri, 15 Aug 2014 10:24:31 +1200 (NZST) Received: from [IPv6:2404:130:0:1000:f58a:4a53:d7ca:3afb] (unknown [IPv6:2404:130:0:1000:f58a:4a53:d7ca:3afb]) (Authenticated sender: mark.kirkwood) by mail.catalyst.net.nz (Postfix) with ESMTPSA id 2792E324F0 for ; Fri, 15 Aug 2014 10:24:31 +1200 (NZST) Message-ID: <53ED371D.109@catalyst.net.nz> Date: Fri, 15 Aug 2014 10:24:29 +1200 From: Mark Kirkwood User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.0 MIME-Version: 1.0 To: pgsql-performance@postgresql.org Subject: Re: 60 core performance with 9.3 References: <53ACB190.2030206@catalyst.net.nz> <53ECFD75.3060408@agliodbs.com> In-Reply-To: <53ECFD75.3060408@agliodbs.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Host-Lookup-Failed: Reverse DNS lookup failed for 2404:130:0:10::40:2 (failed) X-Pg-Spam-Score: -1.1 (-) 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 15/08/14 06:18, Josh Berkus wrote: > Mark, > > Is the 60-core machine using some of the Intel chips which have 20 > hyperthreaded virtual cores? > > If so, I've been seeing some performance issues on these processors. > I'm currently doing a side-by-side hyperthreading on/off test. > Hi Josh, The board has 4 sockets with E7-4890 v2 cpus. They have 15 cores/30 threads. We've running with hyperthreading off (noticed the usual steep/sudden scaling dropoff with it on). What model are your 20 cores cpus? Cheers Mark -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance