X-Original-To: pgsql-performance-postgresql.org@localhost.postgresql.org Received: from localhost (unknown [200.46.204.144]) by svr1.postgresql.org (Postfix) with ESMTP id 8236952B4C for ; Mon, 18 Jul 2005 14:52:57 -0300 (ADT) 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 15692-02 for ; Mon, 18 Jul 2005 17:52:55 +0000 (GMT) Received: from sss.pgh.pa.us (sss.pgh.pa.us [66.207.139.130]) by svr1.postgresql.org (Postfix) with ESMTP id 6F7A952B24 for ; Mon, 18 Jul 2005 14:52:54 -0300 (ADT) Received: from sss2.sss.pgh.pa.us (tgl@localhost [127.0.0.1]) by sss.pgh.pa.us (8.13.1/8.13.1) with ESMTP id j6IHqrKY015473; Mon, 18 Jul 2005 13:52:53 -0400 (EDT) To: Robert Creager Cc: matthew@zeut.net, pgsql-performance@postgresql.org, Andy Hewitt III Subject: Re: Huge performance problem between 7.4.1 and 8.0.3 - CS issue? In-reply-to: <20050718114952.00004ac5@C118181.stortek.com> References: <20050718114952.00004ac5@C118181.stortek.com> Comments: In-reply-to Robert Creager message dated "Mon, 18 Jul 2005 11:49:52 -0600" Date: Mon, 18 Jul 2005 13:52:53 -0400 Message-ID: <15472.1121709173@sss.pgh.pa.us> From: Tom Lane X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, hits=0.006 tagged_above=0 required=5 tests=AWL X-Spam-Level: X-Archive-Number: 200507/263 X-Sequence-Number: 13504 Robert Creager writes: > Around 8:15 I was starting to receive hits of a few seconds of high CS hits, > higher than the previous 7 hour run on 741. I changed the vacuum delay to 0 and > HUP'ed the server (how can I see the value vacuum_cost_delay run > time?). Start a fresh psql session and "SHOW vacuum_cost_delay" to verify what the active setting is. regards, tom lane