Re: Database Statistics???
От | Tom Arthurs |
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Тема | Re: Database Statistics??? |
Дата | |
Msg-id | 4697B8C7.7030304@jobflash.com обсуждение исходный текст |
Ответ на | Database Statistics??? (smiley2211 <smiley2211@yahoo.com>) |
Ответы |
Re: Database Statistics???
|
Список | pgsql-performance |
smiley2211 wrote: > Hello all, > > I am a bit confused...I have a database which was performing very POORLY > selecting from a view (posted earlier) on one server but extremely fast on > another server... > > I just backed up the database from the FAST server and loaded to the SLOW > server and it ran just as fast as it originally did...my questions are: > > Are STATISTICS some how saved with the database?? if so, how do I UPDATE > view or update them? > > Should I backup the data \ drop the database and reload it to make it get > new stats?? (vacuum analyze does nothing for this poor performing database) > > Thanks-a-bunch. > You can update statistics with the analyze or vacuum analyze command, but I'd bet what you are seeing here is the effect of recreating the indices that replaying a backup does.
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