Looks like you need to create some indexes, probably on (groupnum) and
possibly on (groupnum,sku) on both tables.
Hope this helps,
On Mon, Mar 28, 2005 at 01:50:06PM -0600, Yudie Gunawan wrote:
> > Hold on, let's diagnose the real problem before we look for solutions.
> > What does explain <query> tell you? Have you analyzed the database?
>
>
> This is the QUERY PLAN
> Hash Left Join (cost=25.00..412868.31 rows=4979686 width=17)
> Hash Cond: (("outer".groupnum = "inner".groupnum) AND
> (("outer".sku)::text = ("inner".sku)::text))
> Filter: (("inner".url IS NULL) OR (("inner".url)::text = ''::text))
> -> Seq Scan on prdt_old mc (cost=0.00..288349.86 rows=4979686 width=17)
> -> Hash (cost=20.00..20.00 rows=1000 width=78)
> -> Seq Scan on prdt_new mi (cost=0.00..20.00 rows=1000 width=78)
>
>
> > What are your postgresql.conf settings?
>
> What suspected specific setting need to be changed?
--
Martijn van Oosterhout <kleptog@svana.org> http://svana.org/kleptog/
> Patent. n. Genius is 5% inspiration and 95% perspiration. A patent is a
> tool for doing 5% of the work and then sitting around waiting for someone
> else to do the other 95% so you can sue them.