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 18C40529F8 for ; Tue, 19 Jul 2005 15:40:53 -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 71895-02 for ; Tue, 19 Jul 2005 18:40:47 +0000 (GMT) Received: from sss.pgh.pa.us (sss.pgh.pa.us [66.207.139.130]) by svr1.postgresql.org (Postfix) with ESMTP id DBBA1529EF for ; Tue, 19 Jul 2005 15:40:45 -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 j6JIekuK008217; Tue, 19 Jul 2005 14:40:46 -0400 (EDT) To: "Sailer, Denis (YBUSA-CDR)" Cc: pgsql-performance@postgresql.org Subject: Re: context-switching issue on Xeon In-reply-to: <3FB3AAE149F4AD4D8499E15EE8CF41A3460442@YBCDREX01.corp.ybusa.net> References: <3FB3AAE149F4AD4D8499E15EE8CF41A3460442@YBCDREX01.corp.ybusa.net> Comments: In-reply-to "Sailer, Denis (YBUSA-CDR)" message dated "Tue, 19 Jul 2005 13:23:25 -0500" Date: Tue, 19 Jul 2005 14:40:46 -0400 Message-ID: <8216.1121798446@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: 200507/304 X-Sequence-Number: 13545 "Sailer, Denis (YBUSA-CDR)" writes: > http://archives.postgresql.org/pgsql-performance/2004-04/msg00280.php > The last messages on this subject are from April of 2005. Has there > been any successful ways to significantly reduce the impact this has to > multi-processing? CVS tip should largely fix the problem as far as buffer manager contention goes. > I haven't been able to find anything showing a > resolution of some kind. Look at the Feb/March threads concerning buffer manager rewrite, clock sweep, etc ... eg http://archives.postgresql.org/pgsql-patches/2005-03/msg00015.php regards, tom lane