Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1XUfuc-0003vL-Le for pgsql-performance@arkaria.postgresql.org; Thu, 18 Sep 2014 17:54:34 +0000 Received: from localhost ([127.0.0.1] helo=postgresql.org) by malur.postgresql.org with smtp (Exim 4.80) (envelope-from ) id 1XUfub-0007n0-Ek for pgsql-performance@arkaria.postgresql.org; Thu, 18 Sep 2014 17:54:33 +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 1XUfua-0007mt-Cz for pgsql-performance@postgresql.org; Thu, 18 Sep 2014 17:54:32 +0000 Received: from 01.zmailcloud.com ([192.198.85.104] helo=mx-out-1.zmailcloud.com) by magus.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1XUfuW-0003bi-1U for pgsql-performance@postgresql.org; Thu, 18 Sep 2014 17:54:31 +0000 Received: from smtp.01.com (smtp.01.com [10.10.0.43]) by mx-out-1.zmailcloud.com (Postfix) with ESMTP id 9B60D564174 for ; Thu, 18 Sep 2014 12:54:26 -0500 (CDT) Received: from localhost (localhost [127.0.0.1]) by smtp-out-2.01.com (Postfix) with ESMTP id 8A56F60221 for ; Thu, 18 Sep 2014 12:54:26 -0500 (CDT) X-Virus-Scanned: amavisd-new at smtp-out-2.01.com Received: from smtp.01.com ([127.0.0.1]) by localhost (smtp-out-2.01.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id wdUCzHi5kQgf for ; Thu, 18 Sep 2014 12:54:26 -0500 (CDT) Received: from smtp.01.com (localhost [127.0.0.1]) by smtp-out-2.01.com (Postfix) with ESMTP id 62D2C60154 for ; Thu, 18 Sep 2014 12:54:26 -0500 (CDT) Received: from localhost (localhost [127.0.0.1]) by smtp-out-2.01.com (Postfix) with ESMTP id 4CBA4602A1 for ; Thu, 18 Sep 2014 12:54:26 -0500 (CDT) X-Virus-Scanned: amavisd-new at smtp-out-2.01.com Received: from smtp.01.com ([127.0.0.1]) by localhost (smtp-out-2.01.com [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id iWLQgw1hgIsU for ; Thu, 18 Sep 2014 12:54:26 -0500 (CDT) Received: from [172.47.23.104] (70-36-143-82.dsl.dynamic.sonic.net [70.36.143.82]) by smtp-out-2.01.com (Postfix) with ESMTPSA id E09AA60154 for ; Thu, 18 Sep 2014 12:54:25 -0500 (CDT) Message-ID: <541B1C50.7010806@agliodbs.com> Date: Thu, 18 Sep 2014 10:54:24 -0700 From: Josh Berkus Organization: PostgreSQL Experts Inc. User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0 MIME-Version: 1.0 To: pgsql-performance@postgresql.org Subject: Re: postgres 9.3 vs. 9.4 References: <45142416.42827.1411033201079.JavaMail.zimbra@desy.de> <88549888.42916.1411034301200.JavaMail.zimbra@desy.de> <747323809.44735.1411052960344.JavaMail.zimbra@desy.de> In-Reply-To: Content-Type: text/plain; charset=UTF-8 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 09/18/2014 08:09 AM, Mkrtchyan, Tigran wrote: >>> 9.4beta2: >>> > > >> > ... >> > >>> > > 0.957854 END; >>> > > >> > >> > Looks like IO. > Postgres internal IO? May be. We get 600MB/s on this SSDs. While it's possible that this is a Postgres issue, my first thought is that the two SSDs are not actually identical. The 9.4 one may either have a fault, or may be mostly full and heavily fragmented. Or the Dell PCIe card may have an issue. You are using "scale 1" which is a < 1MB database, and one client and 1 thread, which is an interesting test I wouldn't necessarily have done myself. I'll throw the same test on one of my machines and see how it does. -- Josh Berkus PostgreSQL Experts Inc. http://pgexperts.com -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance