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Re: Gsoc2012 idea, tablesample - Mailing list pgsql-hackers

From Robert Haas
Subject Re: Gsoc2012 idea, tablesample
Date
Msg-id CA+TgmoYHC+KCz_uJakW92quktb1w8i3E1OJGygrTusSj76DgvQ@mail.gmail.com
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In response to Re: Gsoc2012 idea, tablesample  ("Kevin Grittner" <Kevin.Grittner@wicourts.gov>)
Responses Re: Gsoc2012 idea, tablesample
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On Fri, May 11, 2012 at 11:36 AM, Kevin Grittner
<Kevin.Grittner@wicourts.gov> wrote:
> Robert Haas <robertmhaas@gmail.com> wrote:
>> The trouble is, AFAICS, that you can't bound M very well without
>> scanning the whole table.  I mean, it's bounded by theoretical
>> limit, but that's it.
>
> What would the theoretical limit be?

MaxHeapTuplesPerPage?

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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