From: Tom Lane <tgl@sss.pgh.pa.us>
To: Bruce Momjian <bruce@momjian.us>
Cc: Andrew Dunstan <andrew@dunslane.net>
Cc: Greg Smith <gsmith@gregsmith.com>
Cc: Andreas Pflug <pgadmin@pse-consulting.de>
Cc: Decibel! <decibel@decibel.org>
Cc: Peter Eisentraut <peter_e@gmx.net>
Cc: pgsql-hackers@postgresql.org, Josh Berkus <josh@agliodbs.com>
Subject: Re: Overhauling GUCS
Date: Wed, 11 Jun 2008 19:35:09 -0400
Message-ID: <24777.1213227309@sss.pgh.pa.us> (raw)
In-Reply-To: <200806112300.m5BN0Dc13952@momjian.us>
References: <200806112300.m5BN0Dc13952@momjian.us>
Bruce Momjian <bruce@momjian.us> writes:
> The second idea is the idea of having one parameter depend on another.
> Not only could we do that for some of our existing parameters, but we
> could have pseudo-parameters like concurrent_queries, memory_usage, and
> extra_disk_space that could be at the top of postgresql.conf and then
> affect the other settings.
We have tried to do that in the past, and it didn't work well *at all*.
The idea has a fundamental logical flaw, which is that it's not clear
which parameter wins if the user changes both.
regards, tom lane
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To: pgsql-hackers@postgresql.org
Cc: tgl@sss.pgh.pa.us, bruce@momjian.us, andrew@dunslane.net, gsmith@gregsmith.com, pgadmin@pse-consulting.de, decibel@decibel.org, peter_e@gmx.net, josh@agliodbs.com
Subject: Re: Overhauling GUCS
In-Reply-To: <24777.1213227309@sss.pgh.pa.us>
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