Received: from makus.postgresql.org ([98.129.198.125]) by malur.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1TIuVO-0000wv-CJ for pgsql-performance@postgresql.org; Tue, 02 Oct 2012 04:54:50 +0000 Received: from mail-pa0-f46.google.com ([209.85.220.46]) by makus.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1TIuVK-0001sn-LR for pgsql-performance@postgresql.org; Tue, 02 Oct 2012 04:54:47 +0000 Received: by padhz1 with SMTP id hz1so4904755pad.19 for ; Mon, 01 Oct 2012 21:54:43 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding :x-gm-message-state; bh=CoZ3jqzwOxGGen09VYax10PIB/GEubAc2eWSuj39Y1k=; b=JXdro277ZLXX6EiQVCpQZAvbgzEFPlu/2zbIfwKQjUMN62LruEE+S0i6O57ONDN+u0 t1ezSIatuUj4H0uc5UN4lMRjMHH0/XosoFU7sDkX6O2L0OUwaPjQqeetac0kqa2TIJAc pnKFhoTkAbLoBvF/QJ5d46lvd++lMdbT9yuK8Emtrg5bRx9Vs1738NEAUz4l/kmcJ9SR IpM5bscSK1XS7yJ7fpJOMhoXhhjeWIRLaIC2yS0b9hV2opdNOf+zTP4A2uULxKicBXNL kD4IuCYCNx9xM3WNVFsFdtF7fEIsKt17ID23Ey06D6xxhaxO8amVYjFfSZQzs9AO0SZg LqKQ== Received: by 10.68.200.72 with SMTP id jq8mr1392624pbc.38.1349153683238; Mon, 01 Oct 2012 21:54:43 -0700 (PDT) Received: from ayaki.localdomain (office1.postnewspapers.com.au. [150.101.171.128]) by mx.google.com with ESMTPS id uz3sm317205pbc.19.2012.10.01.21.54.40 (version=SSLv3 cipher=OTHER); Mon, 01 Oct 2012 21:54:42 -0700 (PDT) Message-ID: <506A738E.8090504@ringerc.id.au> Date: Tue, 02 Oct 2012 12:54:38 +0800 From: Craig Ringer User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:14.0) Gecko/20120717 Thunderbird/14.0 MIME-Version: 1.0 To: Colin Taylor CC: pgsql-performance@postgresql.org Subject: Re: A Tale of 2 algorithms References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Gm-Message-State: ALoCoQlloMkRlafPRauYdZyVgj4ZCL0dbNurF4i3neiyeiCuIxXpqlYNUo4hdcbF47AKSuT9Tk2k X-Pg-Spam-Score: -1.9 (-) X-Archive-Number: 201210/6 X-Sequence-Number: 47965 On 10/02/2012 05:24 AM, Colin Taylor wrote: > My thoughts are: surely 0-row updates dont cause this or have impact on > the vacuum. I'm still doing the same updates after all why have things > degenerated so badly? What exactly is bloating? Have you checked? Is it the table its self? One of its indexes? Something else? -- Craig Ringer