Re: Performance of count(*)

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От Jonah H. Harris
Тема Re: Performance of count(*)
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Msg-id 36e682920703220733s322788f7i5f89339466c7938c@mail.gmail.com
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Ответ на Re: Performance of count(*)  ("Merlin Moncure" <mmoncure@gmail.com>)
Ответы Re: Performance of count(*)  (Mario Weilguni <mweilguni@sime.com>)
Список pgsql-performance
On 3/22/07, Merlin Moncure <mmoncure@gmail.com> wrote:
> As others suggest select count(*) from table is very special case
> which non-mvcc databases can optimize for.

Well, other MVCC database still do it faster than we do.  However, I
think we'll be able to use the dead space map for speeding this up a
bit wouldn't we?

--
Jonah H. Harris, Software Architect | phone: 732.331.1324
EnterpriseDB Corporation            | fax: 732.331.1301
33 Wood Ave S, 3rd Floor            | jharris@enterprisedb.com
Iselin, New Jersey 08830            | http://www.enterprisedb.com/

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