Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1VJMSf-0003fN-3M for pgsql-performance@arkaria.postgresql.org; Tue, 10 Sep 2013 11:50:25 +0000 Received: from localhost ([127.0.0.1] helo=postgresql.org) by malur.postgresql.org with smtp (Exim 4.80) (envelope-from ) id 1VJMSd-0001We-OO for pgsql-performance@arkaria.postgresql.org; Tue, 10 Sep 2013 11:50:23 +0000 Received: from makus.postgresql.org ([2001:4800:7903:4::125]) by malur.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1VJMSc-0001WX-Je for pgsql-performance@postgresql.org; Tue, 10 Sep 2013 11:50:22 +0000 Received: from momjian.us ([72.94.173.45]) by makus.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1VJMSZ-0001P5-Aq for pgsql-performance@postgresql.org; Tue, 10 Sep 2013 11:50:21 +0000 Received: from bruce by momjian.us with local (Exim 4.72) (envelope-from ) id 1VJMSY-0007P2-7d; Tue, 10 Sep 2013 07:50:18 -0400 Date: Tue, 10 Sep 2013 07:50:18 -0400 From: Bruce Momjian To: Mel Llaguno Cc: "pgsql-performance@postgresql.org" Subject: Re: Performance bug in prepared statement binding in 9.2? Message-ID: <20130910115018.GD32160@momjian.us> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) X-Pg-Spam-Score: -2.6 (--) 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 Tue, Sep 10, 2013 at 05:43:16AM +0000, Mel Llaguno wrote: > Bruce, > > First of all, I'd like to thank you for taking some interest in this > issue. We'd love to migrate to the latest PG version, but this issue > is currently preventing us from doing so. > > Regardless of the DB used (base application schema _or_ restored DB > with additional app data + base application schema), seed information > is present in all tests. I guess my question is this - why would > having existing data change the bind behavior at all? Is it possible > that the way indexes are created has changed between 8.4 -> 9.x? I don't know as you have not shown us exactly what is slower between versions --- you only said the bug appears or not in certain circumstances. -- Bruce Momjian http://momjian.us EnterpriseDB http://enterprisedb.com + It's impossible for everything to be true. + -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance