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 01B755293B for ; Mon, 8 Aug 2005 12:37:30 -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 66243-10 for ; Mon, 8 Aug 2005 15:37:22 +0000 (GMT) Received: from sss.pgh.pa.us (sss.pgh.pa.us [66.207.139.130]) by svr1.postgresql.org (Postfix) with ESMTP id DBDC8528CF for ; Mon, 8 Aug 2005 12:37:21 -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 j78FbKcc028802; Mon, 8 Aug 2005 11:37:20 -0400 (EDT) To: "Merlin Moncure" Cc: pgsql-performance@postgresql.org, "Kari Lavikka" Subject: Re: Finding bottleneck In-reply-to: <6EE64EF3AB31D5448D0007DD34EEB3417DD026@Herge.rcsinc.local> References: <6EE64EF3AB31D5448D0007DD34EEB3417DD026@Herge.rcsinc.local> Comments: In-reply-to "Merlin Moncure" message dated "Mon, 08 Aug 2005 11:24:42 -0400" Date: Mon, 08 Aug 2005 11:37:19 -0400 Message-ID: <28801.1123515439@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: 200508/65 X-Sequence-Number: 13812 "Merlin Moncure" writes: >> Kari Lavikka writes: >>> samples % symbol name >>> 13513390 16.0074 AtEOXact_CatCache >> >> That seems quite odd --- I'm not used to seeing that function at the top >> of a profile. What is the workload being profiled, exactly? > He is running a commit_delay of 80000. Could that be playing a role? It wouldn't cause AtEOXact_CatCache to suddenly get expensive. (I have little or no faith in the value of nonzero commit_delay, though.) regards, tom lane