From: Gavin Hamill <gdh@laterooms.com>
To: pgsql-performance@postgresql.org
Subject: VACUUMs take twice as long across all nodes
Date: Thu, 26 Oct 2006 09:58:27 +0100
Message-ID: <20061026095827.9e85e1c0.gdh@laterooms.com> (raw)
Hullo, here's one of those dreadful touchy-feely hand-waving problems.
Our 5-node 8.1.3 Slony system has just started taking /much/ longer to
VACUUM ANALYZE..
The data set has not increased more than usual (nightly backups stand
at 1.3GB, growing by 10MB per day), and no configuration has changed on
the machines.
Nodes 2 and 3 take only the tables necessary to run our search (10 out
of the full 130) and are much lighter (only 7GB on disk cf. 30GB for
the full master) , yet the nightly VACUUM FULL has jumped from 2 hours
to 4 in the space of one day!
Like I say, no config changes, no reboots / postmaster restarts, no extra processes, and every machine has a comfortable overhead of free page slots + relations.
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: gdh@laterooms.com
Subject: Re: VACUUMs take twice as long across all nodes
In-Reply-To: <20061026095827.9e85e1c0.gdh@laterooms.com>
* 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