From: Tom Lane <tgl@sss.pgh.pa.us>
To: Robert Treat <xzilla@users.sourceforge.net>
Cc: pgsql-hackers@postgresql.org, Peter Eisentraut <peter_e@gmx.net>
Cc: Greg Smith <gsmith@gregsmith.com>
Cc: Andreas Pflug <pgadmin@pse-consulting.de>
Cc: Decibel! <decibel@decibel.org>
Cc: Josh Berkus <josh@agliodbs.com>
Subject: Re: Overhauling GUCS
Date: Fri, 06 Jun 2008 20:19:22 -0400
Message-ID: <8358.1212797962@sss.pgh.pa.us> (raw)
In-Reply-To: <200806061624.29105.xzilla@users.sourceforge.net>
References: <48409D1E.3070208@agliodbs.com>
<29525.1212613052@sss.pgh.pa.us>
<200806061435.01196.peter_e@gmx.net>
<200806061624.29105.xzilla@users.sourceforge.net>
Robert Treat <xzilla@users.sourceforge.net> writes:
> There is a saying, something like "The accumulation of annecdotes is not
> data". Well, we seem to have a high bar on what proof we need to actually
> change a default GUC settings. default_statistics_target is a prime example,
> where almost no one i know has ever recommended 10 as a default, or suggests
> setting it to 10 as an way to improve performance, but the effort to get it
> changed to something more reasonable has been monumental.
Actually, the reason it's still 10 is that the effort expended to get it
changed has been *ZERO*. I keep asking for someone to make some
measurements, do some benchmarking, anything to make a plausible case
for a specific higher value as being a reasonable place to set it.
The silence has been deafening.
regards, tom lane
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-hackers@postgresql.org
Cc: tgl@sss.pgh.pa.us, xzilla@users.sourceforge.net, peter_e@gmx.net, gsmith@gregsmith.com, pgadmin@pse-consulting.de, decibel@decibel.org, josh@agliodbs.com
Subject: Re: Overhauling GUCS
In-Reply-To: <8358.1212797962@sss.pgh.pa.us>
* 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