We wish to use Oracle 8i features like partitioning
and global and local indexes in our datawarehousing
project.
We have the following doubts regarding these:
1)Does usage of local index make inserts,updates and
deletes slower as compared to global index?
2)When is the use of Bitmap index preferable over
local index? We have tried using bitmap index and the
performance is slower compared to local index. Any
document on the usage of such indexes would be
helpful.
3) When can we use parallelism to accelerate the speed
of execution of the queries. How is the degree of
parallelism to be given determined?
Any information regarding these queries would be
welcome.
Thanks and regards,
Roby
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