Re: Overhauling GUCS

From: Josh Berkus <josh(at)agliodbs(dot)com>
To: Ron Mayer <rm_pg(at)cheapcomplexdevices(dot)com>
Cc: "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Peter Eisentraut <peter_e(at)gmx(dot)net>, pgsql-hackers(at)postgresql(dot)org, Greg Smith <gsmith(at)gregsmith(dot)com>, Andreas Pflug <pgadmin(at)pse-consulting(dot)de>, "Decibel!" <decibel(at)decibel(dot)org>
Subject: Re: Overhauling GUCS
Date: 2008-06-10 16:33:41
Message-ID: 200806100933.42232.josh@agliodbs.com
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Ron,

> I wonder if the fastest way to generate the configurator
> would be to simply ask everyone to post their tuned
> postgresql.conf files along with a brief description of
> the use case for that file. The we could group the
> use-cases into various classes; and average the values
> of the submitted files. Then the configurator's one
> question "choose which use case most closely matches
> yours from this list".

This has been proposed a number of times, but is still infeasable for the
simple reason that a lot of settings are dependant on how much RAM you have
on the machine. "Sample configs" would just result in people trying to set
their shared_buffers to 150% of system RAM if they have a lightweight system,
or in having 500 different sample configurations, which would produce even
*more* user confusion.

A generator makes more sense.

--
Josh Berkus
PostgreSQL @ Sun
San Francisco

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