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 86AD39DC944
	for <pgsql-performance-postgresql.org@localhost.postgresql.org>;
	Tue, 17 Jan 2006 09:33:42 -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 19365-02
	for <pgsql-performance-postgresql.org@localhost.postgresql.org>;
	Tue, 17 Jan 2006 09:33:45 -0400 (AST)
X-Greylist: from auto-whitelisted by SQLgrey-
Received: from mail.logix-tt.com (serval.logix-tt.com [213.239.221.42])
	by postgresql.org (Postfix) with ESMTP id D080C9DC807
	for <pgsql-performance@postgresql.org>;
	Tue, 17 Jan 2006 09:33:39 -0400 (AST)
Received: from kingfisher.intern.logix-tt.com (Mc7a6.m.pppool.de
	[89.49.199.166])
	(using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))
	(No client certificate requested)
	by mail.logix-tt.com (Postfix) with ESMTP id 9ABD324400F;
	Tue, 17 Jan 2006 14:40:02 +0100 (CET)
Received: from [127.0.0.1] (localhost [127.0.0.1])
	by kingfisher.intern.logix-tt.com (Postfix) with ESMTP id 8244718148C10;
	Tue, 17 Jan 2006 14:33:41 +0100 (CET)
Message-ID: <43CCF235.1080009@logix-tt.com>
Date: Tue, 17 Jan 2006 14:33:41 +0100
From: Markus Schaber <schabi@logix-tt.com>
Organization: Logical Tracking and Tracing International AG, Switzerland
User-Agent: Debian Thunderbird 1.0.7 (X11/20051017)
X-Accept-Language: en-us, en
MIME-Version: 1.0
To: pgsql-performance@postgresql.org
Cc: me@alternize.com
Subject: Re: new to postgres (and db management) and performance
References: <43CC1938.7020807@gmail.com> <18875.1137451410@sss.pgh.pa.us>
	<070501c61aee$ed450560$6402a8c0@iwing>
	<22960.1137460135@sss.pgh.pa.us>
In-Reply-To: <22960.1137460135@sss.pgh.pa.us>
X-Enigmail-Version: 0.93.0.0
Content-Type: text/plain; charset=ISO-8859-15
Content-Transfer-Encoding: 7bit
X-Virus-Scanned: by amavisd-new at hub.org
X-Spam-Status: No, score=0.128 required=5 tests=[AWL=0.128]
X-Spam-Score: 0.128
X-Spam-Level: 
X-Archive-Number: 200601/226
X-Sequence-Number: 16704

Hi, Tom,

Tom Lane wrote:

>>in our db system (for a website), i notice performance boosts after a vacuum 
>>full. but then, a VACUUM FULL takes 50min+ during which the db is not really 
>>accessible to web-users. is there another way to perform maintenance tasks 
>>AND leaving the db fully operable and accessible?
> 
> You're not doing regular vacuums often enough.

It may also help to increase the max_fsm_pages setting, so postmaster
has more memory to remember freed pages between VACUUMs.

HTH,
Markus

-- 
Markus Schaber | Logical Tracking&Tracing International AG
Dipl. Inf.     | Software Development GIS

Fight against software patents in EU! www.ffii.org www.nosoftwarepatents.org