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 5391DD817C for ; Tue, 22 Nov 2005 15:41:43 -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 03622-06 for ; Tue, 22 Nov 2005 19:41:43 +0000 (GMT) X-Greylist: from auto-whitelisted by SQLgrey- Received: from sss.pgh.pa.us (sss.pgh.pa.us [66.207.139.130]) by svr1.postgresql.org (Postfix) with ESMTP id 84A04D9566 for ; Tue, 22 Nov 2005 15:41:40 -0400 (AST) 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 jAMJfe2L013417; Tue, 22 Nov 2005 14:41:40 -0500 (EST) To: "Anjan Dave" cc: "Vivek Khera" , "Postgresql Performance" Subject: Re: High context switches occurring In-reply-to: <4BAFBB6B9CC46F41B2AD7D9F4BBAF785027001C1@vt-pe2550-001.vantage.vantage.com> References: <4BAFBB6B9CC46F41B2AD7D9F4BBAF785027001C1@vt-pe2550-001.vantage.vantage.com> Comments: In-reply-to "Anjan Dave" message dated "Tue, 22 Nov 2005 14:23:34 -0500" Date: Tue, 22 Nov 2005 14:41:40 -0500 Message-ID: <13416.1132688500@sss.pgh.pa.us> From: Tom Lane X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, score=0.003 required=5 tests=[AWL=0.003] X-Spam-Score: 0.003 X-Spam-Level: X-Archive-Number: 200511/454 X-Sequence-Number: 15711 "Anjan Dave" writes: > Would this problem change it's nature in any way on the recent Dual-Core > Intel XEON MP machines? Probably not much. There's some evidence that Opterons have less of a problem than Xeons in multi-chip configurations, but we've seen CS thrashing on Opterons too. I think the issue is probably there to some extent in any modern SMP architecture. regards, tom lane