From: Robert Creager <Robert_Creager@LogicalChaos.org>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: PGPerformance <pgsql-performance@postgresql.org>
Cc: Andy Hewitt <Andy_Hewitt@StorageTek.com>
Subject: Re: Huge performance problem between 7.4.1 and 8.0.3 - CS
Date: Sun, 17 Jul 2005 23:09:12 -0600
Message-ID: <20050717230912.12d51ec9@thunder.logicalchaos.org> (raw)
In-Reply-To: <24520.1121659853@sss.pgh.pa.us>
References: <20050717213416.59dcb52e@thunder.logicalchaos.org>
<24520.1121659853@sss.pgh.pa.us>
When grilled further on (Mon, 18 Jul 2005 00:10:53 -0400),
Tom Lane <tgl@sss.pgh.pa.us> confessed:
> Have you tried reverting
> to the cron-based vacuuming method you used in 7.4?
>
I just stopped autovacuum, ran a manual vacuum analyze on 803 (2064 pages
needed, 8000000 FSM setting) and re-started the run (with cron vac enabled).
The query problem has not showed up yet (1/2 hour). A vacuum on 741 showed 3434
pages needed, 200000 FSM setting.
I'll let it run the night and see if it shows up after a couple of hours. It
has run clean for 1 hour prior. If this runs 'till morning, I'll re-enable the
autovacuum, disable the cron and see if it reproduces itself (the slowdown).
Cheers,
Rob
--
22:18:40 up 4 days, 1:53, 8 users, load average: 0.10, 0.20, 0.14
Linux 2.6.5-02 #8 SMP Mon Jul 12 21:34:44 MDT 2004
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-performance@postgresql.org
Cc: Robert_Creager@LogicalChaos.org, tgl@sss.pgh.pa.us, Andy_Hewitt@StorageTek.com
Subject: Re: Huge performance problem between 7.4.1 and 8.0.3 - CS
In-Reply-To: <20050717230912.12d51ec9@thunder.logicalchaos.org>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox