Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1WISFl-0006oI-82 for pgsql-performance@arkaria.postgresql.org; Wed, 26 Feb 2014 00:21:37 +0000 Received: from localhost ([127.0.0.1] helo=postgresql.org) by malur.postgresql.org with smtp (Exim 4.80) (envelope-from ) id 1WISFk-0006sd-Oc for pgsql-performance@arkaria.postgresql.org; Wed, 26 Feb 2014 00:21:36 +0000 Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29]) by malur.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1WISFj-0006sV-Jw for pgsql-performance@postgresql.org; Wed, 26 Feb 2014 00:21:35 +0000 Received: from smtp.01.com ([199.36.142.181]) by magus.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1WISFa-00053U-Rl for pgsql-performance@postgresql.org; Wed, 26 Feb 2014 00:21:35 +0000 Received: from localhost (localhost [127.0.0.1]) by smtp-out-1.01.com (Postfix) with ESMTP id 24471294048; Tue, 25 Feb 2014 18:21:25 -0600 (CST) X-Virus-Scanned: amavisd-new at smtp-out-1.01.com Received: from smtp.01.com ([127.0.0.1]) by localhost (smtp-out-1.01.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id z00gTKmaabmE; Tue, 25 Feb 2014 18:21:25 -0600 (CST) Received: from smtp.01.com (localhost [127.0.0.1]) by smtp-out-1.01.com (Postfix) with ESMTP id 01D0729407B; Tue, 25 Feb 2014 18:21:25 -0600 (CST) Received: from localhost (localhost [127.0.0.1]) by smtp-out-1.01.com (Postfix) with ESMTP id E1B91294048; Tue, 25 Feb 2014 18:21:24 -0600 (CST) X-Virus-Scanned: amavisd-new at smtp-out-1.01.com Received: from smtp.01.com ([127.0.0.1]) by localhost (smtp-out-1.01.com [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id 906vq7Th6jt6; Tue, 25 Feb 2014 18:21:24 -0600 (CST) Received: from [172.47.23.102] (50-0-190-100.dsl.dynamic.sonic.net [50.0.190.100]) by smtp-out-1.01.com (Postfix) with ESMTPSA id 0A9F3294067; Tue, 25 Feb 2014 18:21:23 -0600 (CST) Message-ID: <530D337D.7060303@agliodbs.com> Date: Tue, 25 Feb 2014 16:21:17 -0800 From: Josh Berkus Organization: PostgreSQL Experts Inc. User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.3.0 MIME-Version: 1.0 To: Tom Lane , Andres Freund CC: Jeff Janes , "pgsql-performance@postgresql.org" , =?UTF-8?B?QmFydO+/ve+/ve+/vW9taWVqIFJvbWHvv73vv73vv71za2k=?= Subject: Re: Planner performance extremely affected by an hanging transaction (20-30 times)? References: <5815.1380018947@sss.pgh.pa.us> <5241CF2A.2070309@agliodbs.com> <20130925175312.GB5578@awork2.anarazel.de> <20130925184330.GC5578@awork2.anarazel.de> <5245F11E.20804@agliodbs.com> <20130927211439.GB7260@awork2.anarazel.de> <11927.1384199294@sss.pgh.pa.us> <32089.1393344411@sss.pgh.pa.us> In-Reply-To: X-Enigmail-Version: 1.6 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 02/25/2014 08:06 AM, Tom Lane wrote: > Well, it's three months later, and none of the people who were complaining > so vociferously in this thread seem to have bothered to test the proposed > solution. Sorry about that. The client lost interest once they had a workaround (fixing the hanging transaction), and I don't have direct access to their test workload -- nor was I able to reproduce the issue on a purely synthetic workload. > However, over at > http://www.postgresql.org/message-id/CAFj8pRDHyAK_2JHSVKZ5YQNGQmFGVcJKcpBXhFaS=vSSCH-vNw@mail.gmail.com > Pavel did test it and reported that it successfully alleviates his > real-world problem. So I'm now inclined to commit this. Objections? None from me. -- 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