Re: How to influence the planner

From: Richard Huxton <dev(at)archonet(dot)com>
To: Richard Ray <rray(at)mstc(dot)state(dot)ms(dot)us>
Cc: pgsql-sql(at)postgresql(dot)org
Subject: Re: How to influence the planner
Date: 2007-09-01 10:29:34
Message-ID: 46D93F0E.5070404@archonet.com
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Richard Ray wrote:
>
> When is enable_seqscan = off appropriate

Never(*)

It's not for normal usage, the various enable_xxx settings do let you
experiment with different options if you think the planner is making a
mistake.

(*) OK, sooner or later, if you have enough systems and enough
performance-critical queries then you might want to use it in
production. But only if you really know what you're doing and you've
exhausted you're other options.

--
Richard Huxton
Archonet Ltd

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