Re: Sort time

On Fri, 2002-11-15 at 12:33, Josh Berkus wrote:
> Pginfo,
>
> > Yes I have indexes on all this fields.
> > Also I vacuumed and that is the result after it.
> > Actualy I do not see what bad in query execution. The problem is in
> > sort
> > time!
>
> Hmmm... I don't understand.  The way I read the EXPLAIN, the sort is
> only taking a few seconds.   Am I missing something, here?

The estimated cost had the sort at a few seconds, but the actual times
show it is taking 50% of the total query time.

The big problem is he's sorting by a varchar() which isn't overly quick
no matter what locale.  Integers are nice and quick (s.OP is an int,
which shows this).

If IDS_NUM is a number, he could try casting it to an int8, but without
data examples I couldn't say.

--
Rod Taylor <rbt@rbt.ca>