Re: in memory views

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От Scott Marlowe
Тема Re: in memory views
Дата
Msg-id 1147273917.9755.22.camel@state.g2switchworks.com
обсуждение исходный текст
Ответ на Re: in memory views  (Thomas Vatter <thomas.vatter@network-inventory.de>)
Ответы Re: in memory views  (Thomas Vatter <thomas.vatter@network-inventory.de>)
Список pgsql-performance
On Wed, 2006-05-10 at 04:55, Thomas Vatter wrote:
> Tino Wildenhain wrote:
>
> > Thomas Vatter schrieb:
> >
> >> is there a possibility for creating views or temp tables in memory to
> >> avoid disk io when user makes select operations?
> >
> >
> > No need. The data will be available in OS and database caches if
> > they are really required often. If not, tune up the caches and
> > do a regular "pre select".
> >
> > Regards
> > Tino
> >
> >
>
> hmm, I am selecting a resultset with 1300 rows joined from 12 tables.
> with jdbc I am waiting 40 seconds until the first row appears. The
> following rows appear really fast but the 40 seconds are a problem.

Are you selecting the whole set at once?  Or are you placing it into a
cursor?

What happens if you do this by declaring it as a cursor and then
fetching the first row?

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