Drill Through reports takes too long

Hi all,
I need some suggestions/help with our drill through reports. We are using Hyperion 11.1.1.3 and the cube is ASO.
We have drill through reports set up in Essbase studio for drilling down from Essbase to Oracle database. It takes too long (like 30 mins for fetching 1000 records) and the query is simple.
What are the changes that we can do to bring down this time. Please advice.
Thanks.

Hi Glenn,
We tried optimizing the drill through SQL query but actually when we run the directly in TOAD it takes *23 secs* but when we do drill through on the same intersection
it took more than 25 mins. Following is our query structure :
(SELECT *
FROM "Table A" cp_594
INNER JOIN "Table B" cp_595 ON (cp_594.key = cp_595.key)
WHERE (Upper(cp_595.*"Dim1"*) in (select Upper(CHILD) from (SELECT * FROM DIM_TABLE_1 where CUBE = 'ALL') WHERE CONNECT_BY_ISLEAF = 1 START WITH PARENT = $$Dim1$$ CONNECT BY PRIOR CHILD = PARENT UNION ALL select Upper(CHILD) from DIM_TABLE_1 where CUBE = 'ALL' AND REPLACE('GL_'||CHILD, 'GL_IC_', 'IC_') = $$Dim1$$))
And ----same for 5 more dimensions
Can you suggest some improvement ? Please advice.
Thanks

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