vacuum analyze again...

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От Jean-Christophe Boggio
Тема vacuum analyze again...
Дата
Msg-id 14280229200.20010220103053@thefreecat.org
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Ответы Re: vacuum analyze again...  (Bruce Momjian <pgman@candle.pha.pa.us>)
Список pgsql-general
Hi,

In Oracle, there are 2 ways to do the equivalent of vacuum analyze :

* analyze table xx compute statitics
* analyze table xx estimate statistics

In the second form, you can tell on what percentage of the file you
will do your stats. This is useful to make a quick analyze on huge tables
that have a homogenous dispersion.

Is there a way to "estimate" the statistics that vacuum analyze will
use instead of "computing" them ?

--
Jean-Christophe Boggio
cat@thefreecat.org
Independant Consultant and Developer
Delphi, Linux, Perl, PostgreSQL



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