From: Ron Mayer <rm_pg@cheapcomplexdevices.com>
To: Tom Lane <tgl@sss.pgh.pa.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: Thu, 05 Jun 2008 12:50:24 -0700
Message-ID: <48484380.1010504@cheapcomplexdevices.com> (raw)
In-Reply-To: <7473.1212625397@sss.pgh.pa.us>
References: <48409D1E.3070208@agliodbs.com>
<200806010032.53337.peter_e@gmx.net>
<Pine.GSO.4.64.0806020452220.26912@westnet.com>
<17932.1212415926@sss.pgh.pa.us>
<20080604131810.GH65238@decibel.org>
<4846A483.8000001@pse-consulting.de>
<Pine.GSO.4.64.0806041045520.2258@westnet.com>
<29525.1212613052@sss.pgh.pa.us>
<48472E47.7030701@dunslane.net>
<7473.1212625397@sss.pgh.pa.us>
Tom Lane wrote:
> How far could we get with the answers to just three questions:
>
> * How many concurrent queries do you expect to have?
> * How much RAM space are you willing to let Postgres use?
> * How much "overhead" disk space are you willing to let Postgres use?
+1 to this approach - these are the kinds of questions that
make sense to me when first setting up a new installation.
They sound useful for both large servers and tiny (salesguy
laptop for demos) installations.
> If those aren't enough questions, what else must we ask?
* Perhaps something to guess FSM settings? I think FSM is
tunable I most often get wrong with more painful
consequences (bloat) than other tunables.
My approach is to have cron run database-wide vacuums
even on systems with autovacuum just to see the log
messages about FSM.
* Something to tune vacuum delay? Perhaps:
How much I/O bandwidth can be dedicated to Postgres
background activities?
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: rm_pg@cheapcomplexdevices.com, tgl@sss.pgh.pa.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: <48484380.1010504@cheapcomplexdevices.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