Re: Normal case or bad query plan?

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От Steinar H. Gunderson
Тема Re: Normal case or bad query plan?
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Msg-id 20041012144054.GA8166@uio.no
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Ответ на Re: Normal case or bad query plan?  ("Gabriele Bartolini" <angusgb@tin.it>)
Список pgsql-performance
On Tue, Oct 12, 2004 at 04:29:36PM +0200, Gabriele Bartolini wrote:
> FYI I set it to 1000 (the maximum) and I reduced the query's estimated time
> by the 90% (from 40000ms to 4000ms) although much slower than the index
> scan (200ms).

Note that the estimated times are _not_ in ms. They are in multiples of a
disk fetch (?). Thus, you can't compare estimated and real times like that.

/* Steinar */
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