Re: vacuum analyze again...
От | Bruce Momjian |
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Тема | Re: vacuum analyze again... |
Дата | |
Msg-id | 200102201725.MAA07254@candle.pha.pa.us обсуждение исходный текст |
Ответ на | Re: vacuum analyze again... (Chris Jones <chris@mt.sri.com>) |
Ответы |
Re: vacuum analyze again...
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Список | pgsql-general |
> 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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