Re: strange estimate for number of rows

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От Andrew Sullivan
Тема Re: strange estimate for number of rows
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Msg-id 20031113215251.GL25546@libertyrms.info
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Ответ на Re: strange estimate for number of rows  (Andrew Sullivan <andrew@libertyrms.info>)
Список pgsql-performance
On Thu, Nov 13, 2003 at 04:37:03PM -0500, Andrew Sullivan wrote:
> Actually, this one's on an internal box, and I think 1.5 is too low
> -- it's really just a pair of mirrored SCSI disks on a PCI controller
> in this case.  That does the trick, though, so maybe I'm just being
> too conservantive.

I spoke too soon.  I'd left enable_seqscan=off set.  It doesn't
actually prefer an indexscan until I set the random_page_cost to .5.
I think that's a little unrealistic ;-)

A

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