Re: visibility map and reltuples

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От Greg Smith
Тема Re: visibility map and reltuples
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Msg-id Pine.GSO.4.64.0812151207180.7153@westnet.com
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Ответ на Re: visibility map and reltuples  (Greg Stark <greg.stark@enterprisedb.com>)
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On Mon, 15 Dec 2008, Greg Stark wrote:

> I wonder if we should switch to keeping reltuplesperpage instead.

It would be preferrable to not touch the user side of reltuples if 
possible, since it's the only instant way to get a good estimate of the 
number of rows in a table right now.  That's been a regular application 
technique for at least two years now, since 
http://www.varlena.com/GeneralBits/120.php popularized it.

--
* Greg Smith gsmith@gregsmith.com http://www.gregsmith.com Baltimore, MD


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