Received: from maia.hub.org (maia-5.hub.org [200.46.204.29]) by mail.postgresql.org (Postfix) with ESMTP id 6CEF7632978 for ; Fri, 11 Jun 2010 13:50:17 -0300 (ADT) Received: from mail.postgresql.org ([200.46.204.86]) by maia.hub.org (mx1.hub.org [200.46.204.29]) (amavisd-maia, port 10024) with ESMTP id 16382-07 for ; Fri, 11 Jun 2010 16:50:08 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from lo.gmane.org (lo.gmane.org [80.91.229.12]) by mail.postgresql.org (Postfix) with ESMTP id 93137632731 for ; Fri, 11 Jun 2010 13:50:08 -0300 (ADT) Received: from list by lo.gmane.org with local (Exim 4.69) (envelope-from ) id 1ON7Qh-0001YW-Qz for pgsql-performance@postgresql.org; Fri, 11 Jun 2010 18:50:03 +0200 Received: from wsip-72-215-173-127.sb.sd.cox.net ([72.215.173.127]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 11 Jun 2010 18:50:03 +0200 Received: from jreeve by wsip-72-215-173-127.sb.sd.cox.net with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 11 Jun 2010 18:50:03 +0200 X-Injected-Via-Gmane: http://gmane.org/ To: pgsql-performance@postgresql.org connect(): No such file or directory From: John Reeve Subject: Re: Large (almost 50%!) performance drop =?utf-8?b?YWZ0ZXIJ?= upgrading to 8.4.4? Date: Fri, 11 Jun 2010 16:34:30 +0000 (UTC) Lines: 32 Message-ID: References: <0357196CB603794BB76F4F6B373F27330506EACE45@SERVER.ddnglobal.local> <1276158598.5764.22.camel@hp-laptop2.gunduz.org> <0357196CB603794BB76F4F6B373F27330506EACE51@SERVER.ddnglobal.local> <15383.1276179056@sss.pgh.pa.us> <0357196CB603794BB76F4F6B373F27330506EACE55@SERVER.ddnglobal.local> <4C10BB59020000250003214A@gw.wicourts.gov> <0357196CB603794BB76F4F6B373F27330506EACE56@SERVER.ddnglobal.local> <4C1147F0.2090607@2ndquadrant.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Complaints-To: usenet@dough.gmane.org X-Gmane-NNTP-Posting-Host: sea.gmane.org User-Agent: Loom/3.14 (http://gmane.org/) X-Loom-IP: 72.215.173.127 (Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/533.4 (KHTML, like Gecko) Chrome/5.0.375.55 Safari/533.4) X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=0.983 tagged_above=-10 required=5 tests=BAYES_40=-0.001, PLING_QUERY=0.994, T_RP_MATCHES_RCVD=-0.01 X-Spam-Level: X-Archive-Number: 201006/213 X-Sequence-Number: 39069 Greg Smith 2ndquadrant.com> writes: > > Max Williams wrote: > > Can I just turn this off on 8.4.4 or is it a compile time option > > You can update your postgresql.conf to include: > > debug_assertions = false > > And restart the server. This will buy you back *some* of the > performance loss but not all of it. Will have to wait for corrected > packaged to make the issue completely go away. > Ah! I am so thankful I found this thread. We've been having the same issues described here. And when I do a SHOW debug_assertions I get: postgres=# show debug_assertions; debug_assertions ------------------ on (1 row) Can you let us know when the corrected packages have become available? Regards, John