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I have and SQL COUNT statement running over a complex SQL View... The SELECT statement of the same rows takes 1-2 seconds. The COUNT(*) takes 6-8 seconds.
When I ran this through RUN SQL SCRIPTS using run & explain, I see:
Hash Probe <- Temporary Hash Table <- Table Probe
The Table Probe is 90% of the time used. I'm just not sure how to eliminate or reduce the amount of CPU time this takes.
I already have quite a few indexes over the DB2 table... I can see that in the "List of Indexes Optimized"
Anyone point me in the right direction?
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