Re: vacuum analyze again...

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От Bruce Momjian
Тема Re: vacuum analyze again...
Дата
Msg-id 200102201725.MAA07254@candle.pha.pa.us
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Ответ на Re: vacuum analyze again...  (Chris Jones <chris@mt.sri.com>)
Ответы Re: vacuum analyze again...
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> Bruce Momjian <pgman@candle.pha.pa.us> writes:
>
> > No, we have no ability to randomly pick rows to use for estimating
> > statistics.  Should we have this ability?
>
> That would be really slick, especially given the fact that VACUUM runs
> much faster than VACUUM ANALYZE for a lot of PG users.  I could change
> my daily maintenance scripts to do a VACUUM of everything, followed by
> a VACUUM ANALYZE of the small tables, followed by a VACUUM ANALYZE
> ESTIMATE (or whatever) of the large tables.
>
> Even cooler would be the ability to set a table size threshold, so
> that VACUUM ANALYZE would automatically choose the appropriate method
> based on the table size.

Added to TODO:

        * Allow ANALYZE to process a certain random precentage of rows

--
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 853-3000
  +  If your life is a hard drive,     |  830 Blythe Avenue
  +  Christ can be your backup.        |  Drexel Hill, Pennsylvania 19026

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