Rhaoni Chiu Pereira writes:

>    I trying to increase performance in my PostgreSQL but there is something
> wrong.    when I run this SQL for the first time

Which SQL?

> it takes 1 min. 40 seconds to
> return, but when I run it for the second time it takes more than 2 minutes, and
> I should retunr faster than the first time.

What happens the third time?

Peter Eisentraut   [EMAIL PROTECTED]

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