X-Original-To: pgsql-performance-postgresql.org@localhost.postgresql.org Received: from localhost (av.hub.org [200.46.204.144]) by postgresql.org (Postfix) with ESMTP id 87CBB9DCB55 for ; Wed, 7 Dec 2005 00:49:32 -0400 (AST) Received: from postgresql.org ([200.46.204.71]) by localhost (av.hub.org [200.46.204.144]) (amavisd-new, port 10024) with ESMTP id 20657-08 for ; Wed, 7 Dec 2005 00:49:31 -0400 (AST) X-Greylist: from auto-whitelisted by SQLgrey- Received: from sss.pgh.pa.us (sss.pgh.pa.us [66.207.139.130]) by postgresql.org (Postfix) with ESMTP id 5DF789DCB38 for ; Wed, 7 Dec 2005 00:49:30 -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 jB74nSMe024709; Tue, 6 Dec 2005 23:49:28 -0500 (EST) To: Bruce Momjian cc: Tatsuo Ishii , Postgresql Performance Subject: Re: High context switches occurring In-reply-to: <200512070434.jB74Y4o20004@candle.pha.pa.us> References: <200512070434.jB74Y4o20004@candle.pha.pa.us> Comments: In-reply-to Bruce Momjian message dated "Tue, 06 Dec 2005 23:34:04 -0500" Date: Tue, 06 Dec 2005 23:49:28 -0500 Message-ID: <24708.1133930968@sss.pgh.pa.us> From: Tom Lane X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, score=0.002 required=5 tests=[AWL=0.002] X-Spam-Score: 0.002 X-Spam-Level: X-Archive-Number: 200512/221 X-Sequence-Number: 16042 Bruce Momjian writes: > Tom Lane wrote: >> 1. You don't want number of clients (-c) much higher than scaling factor >> (-s in the initialization step). > Should we throw a warning when someone runs the test this way? Not a bad idea (though of course only for the "standard" scripts). Tatsuo, what do you think? regards, tom lane