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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Need help tuning FTS
Srini,
I am sure you have lots of users in Prod compared to QA :)
Anyway, the point is that you are suffering from hot block contention which reflects itself in latch waits on 'cache buffer chain'. I remember that Steve Adams has a SQL at his site that identifies blocks that are 'hot' - I have used a modified version of that to identify objects that are hot. If I know that there are corresponding Conc. Manager jobs that are accessing that part of the Apps, then I know that this is due to contending reports.... I have managed to reduce this by rebuilding stale indexes as heavy inserts/updates/deletes also add to this. Short of re-scheduling jobs and playing around with _DB_BLOCK_HASH_LATCHES, I don't see any solutions. Do post us if you manage to reduce contention using the _ parameter as we have a similar problem.
John Kanagaraj
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Author: John Kanagaraj
INET: john.kanagaraj_at_hds.com
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