----- Original Message -----
Sent: Thursday, June 06, 2002 12:38
PM
Subject: RE: why so much slower
Tried that
-----Original Message-----
From: Mike
Killough [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, June 05, 2002 7:19 PM
To: Multiple recipients of list ORACLE-L
Subject: RE: why so much slower
Why don't you try using a leading or ordered hint to get
oracle to use the
smaller table first?
>From: [EMAIL PROTECTED]
>Reply-To: [EMAIL PROTECTED]
>To: Multiple recipients of list ORACLE-L
<[EMAIL PROTECTED]>
>Subject: RE: why so
much slower
>Date: Wed, 05 Jun 2002 12:18:45
-0800
>
>more
info. It seemed just when I went from two to three tables in a
join
>there was a very substantial increase in
elapsed time. I did join with one
>large
table and small codetable alone and performed like a champ.
Hmmmm.
>Any ideas?
>
>-----Original Message-----
>Sent: Wednesday, June 05, 2002 3:03 PM
>To: '[EMAIL PROTECTED]'
>
>
>
>Set sort_area_size to very large as 20Gb (obscene) amount of
space
>available.
>Doing
2 large table outer joins returns results in .341 seconds - both
>partitioned on same criteria
>added one small codetable equijoin with one of the larger
tables. There is
>a foreign key to codetable
and index that is unique.
>Used hash join
hint
>Used nested loop hint
>
>Basically saw two large joins sort
merged hash join then nested join to
>smaller table
- much much smaller codetable.
>
>NO matter what it seems query is much much slower - Any
ideas?
>
>
>
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Author: Mike Killough
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