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 96B98D8452 for ; Wed, 2 Nov 2005 10:41:12 -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 74583-04 for ; Wed, 2 Nov 2005 14:41:09 +0000 (GMT) Received: from sss.pgh.pa.us (sss.pgh.pa.us [66.207.139.130]) by svr1.postgresql.org (Postfix) with ESMTP id E1713D830C for ; Wed, 2 Nov 2005 10:41:10 -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 jA2EfEki005354; Wed, 2 Nov 2005 09:41:14 -0500 (EST) To: "PostgreSQL" Cc: pgsql-performance@postgresql.org Subject: Re: 8.1beta3 performance In-reply-to: References: <20051101085037.1b12b077@fc63r41.npci.com> <26529.1130865883@sss.pgh.pa.us> Comments: In-reply-to "PostgreSQL" message dated "Wed, 02 Nov 2005 03:32:45 -0600" Date: Wed, 02 Nov 2005 09:41:14 -0500 Message-ID: <5353.1130942474@sss.pgh.pa.us> From: Tom Lane X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, score=0.006 required=5 tests=[AWL=0.006] X-Spam-Score: 0.006 X-Spam-Level: X-Archive-Number: 200511/28 X-Sequence-Number: 15285 "PostgreSQL" writes: > I'm seeing some other little oddities in the beta as well. I'm watching an > ALTER TABLE ADD COLUMN right now that has been running almost two hours. I > stopped it the first time at 1 hour; I suppose I'll let it go this time and > see if it ever completes. The table is about 150K rows. Top, vmstat, and > iostat show almost no cpu or disk activity (1 to 3%) - it's as if it just > went to sleep. You sure it's not blocked on a lock? Check pg_locks ... if that sheds no light, try attaching to the backend process with gdb and getting a stack trace. regards, tom lane