Re: SELECT with MANY tables

Javier Carlos <fjcarlos@correo.insp.mx> writes:
>    When I make a SELECT with many tables (more than 12), postgresql eats all my
> %CPU and I've waited more than 1 hour and stays the same. The weird thing is
> that with 10 tables the same select with the same joins only takes about 5
> seconds. First I thought that It was a problem related with one specific table,
> but I've changed in the SELECT the tables and while the number of tables remains
> less than 12 all is ok.

Hm.  Are you using the default GEQO settings, or something custom?

            regards, tom lane