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Re: Info on explain output

From: "Josh Berkus" <josh(at)agliodbs(dot)com>
To: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>,Adam Witney <awitney(at)sghms(dot)ac(dot)uk>
Cc: pgsql-performance <pgsql-performance(at)postgresql(dot)org>
Subject: Re: Info on explain output
Date: 2002-10-10 16:59:18
Message-ID: web-1780475@davinci.ethosmedia.com (view raw or flat)
Thread:
Lists: pgsql-performance
Adam,

> > Are there any good rules of thumb of things one should be looking
> out for in
> > EXPLAIN output? ie <blah> means that an index would be good here
> etc

Also try:
1) Various articles on Techdocs.postgresql.org
2) Ewald G.'s PostgreSQL Book

Explain output is not that easily converted into a plan of action ...
otherwise, Postgres would have automated it, neh?   You have to get a
feel for what looks good and bad dynamically.

-Josh Berkus

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