X-Original-To: pgsql-hackers-postgresql.org@postgresql.org Received: from localhost (mx1.hub.org [200.46.208.251]) by postgresql.org (Postfix) with ESMTP id 625D69FB2C1 for ; Tue, 18 Jul 2006 14:06:29 -0300 (ADT) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.208.251]) (amavisd-new, port 10024) with ESMTP id 56828-06-4 for ; Tue, 18 Jul 2006 14:06:04 -0300 (ADT) 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 81DC19FB2AC for ; Tue, 18 Jul 2006 13:52:25 -0300 (ADT) Received: from sss2.sss.pgh.pa.us (tgl@localhost [127.0.0.1]) by sss.pgh.pa.us (8.13.6/8.13.6) with ESMTP id k6IGpsTM005127; Tue, 18 Jul 2006 12:51:58 -0400 (EDT) To: Katsuhiko Okano cc: pgsql-hackers@postgresql.org Subject: Re: CSStorm occurred again by postgreSQL8.2. (Re: poor performance with Context Switch Storm at TPC-W.) In-reply-to: <200607181650.EDC81237.LOBJUTPuIPPBLLV@oss.ntt.co.jp> References: <200607112009.FED09315.TLPPUBIBOPuVLJL@oss.ntt.co.jp> <20060711135951.GA3995@surnet.cl> <200607141457.CFC04165.PBLJLPVTILUBOPu@oss.ntt.co.jp> <200607181650.EDC81237.LOBJUTPuIPPBLLV@oss.ntt.co.jp> Comments: In-reply-to Katsuhiko Okano message dated "Tue, 18 Jul 2006 16:50:43 +0900" Date: Tue, 18 Jul 2006 12:51:53 -0400 Message-ID: <5126.1153241513@sss.pgh.pa.us> From: Tom Lane X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200607/708 X-Sequence-Number: 86563 Katsuhiko Okano writes: > It does not solve, even if it increases the number of NUM_SUBTRANS_BUFFERS. > The problem was only postponed. Can you provide a reproducible test case for this? regards, tom lane