X-Original-To: pgsql-performance-postgresql.org@localhost.postgresql.org Received: from localhost (av.hub.org [200.46.204.144]) by svr1.postgresql.org (Postfix) with ESMTP id E4BB1DB9B5 for ; Thu, 17 Nov 2005 18:13:16 -0400 (AST) Received: from svr1.postgresql.org ([200.46.204.71]) by localhost (av.hub.org [200.46.204.144]) (amavisd-new, port 10024) with ESMTP id 69201-05 for ; Thu, 17 Nov 2005 22:13:18 +0000 (GMT) X-Greylist: from auto-whitelisted by SQLgrey- Received: from smtp100.rog.mail.re2.yahoo.com (smtp100.rog.mail.re2.yahoo.com [206.190.36.78]) by svr1.postgresql.org (Postfix) with SMTP id 26434DB96C for ; Thu, 17 Nov 2005 18:13:13 -0400 (AST) Received: (qmail 40787 invoked from network); 17 Nov 2005 22:13:15 -0000 Received: from unknown (HELO phlogiston.dydns.org) (a.sullivan@rogers.com@209.222.54.227 with login) by smtp100.rog.mail.re2.yahoo.com with SMTP; 17 Nov 2005 22:13:15 -0000 Received: by phlogiston.dydns.org (Postfix, from userid 1000) id 764414109; Thu, 17 Nov 2005 17:13:14 -0500 (EST) Date: Thu, 17 Nov 2005 17:13:14 -0500 From: Andrew Sullivan To: pgsql-performance@postgresql.org Subject: Re: weird performances problem Message-ID: <20051117221314.GC26696@phlogiston.dyndns.org> References: <437CC21D.8070402@openwide.fr> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <437CC21D.8070402@openwide.fr> User-Agent: Mutt/1.5.9i X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, score=0 required=5 tests=[AWL=0.000] X-Spam-Score: 0 X-Spam-Level: X-Archive-Number: 200511/336 X-Sequence-Number: 15593 On Thu, Nov 17, 2005 at 06:47:09PM +0100, Guillaume Smet wrote: > queries are executed fast even if they are complicated but sometimes and > for half an hour, we have a general slow down. Is it exactly half an hour? What changes at the time that happens (i.e. what else happens on the machine?). Is this a time, for example, when logrotate is killing your I/O with file moves? A -- Andrew Sullivan | ajs@crankycanuck.ca I remember when computers were frustrating because they *did* exactly what you told them to. That actually seems sort of quaint now. --J.D. Baldwin