Re: Slow performance with no apparent reason

Yonatan Goraly kirjutas P, 26.10.2003 kell 00:25:
> I am in the process of  adding PostgreSQL support for an application,
> in addition to Oracle and MS SQL.
> I am using PostgreSQL version 7.3.2, Red Hat 9.0 on Intel Pentium III
> board.
>
> I have a query that generally looks like this:
>
> SELECT t1.col1, t2.col1 FROM t1, t2 WHERE t1.x=t2.y AND t2.p='string'
> AND t2.q=1
>
> This query is strikingly slow (about 100 sec when both t1 and t2 has
> about 1,200 records, compare with less than 4 sec with MS SQL and
> Oracle)

always send results of EXPLAIN ANALYZE if you ask for help on [PERFORM]

knowing which indexes you have would also help.

and you should have run ANALYZE too.

-----------------
Hannu