[Mondrian] Performance degradation
mkambol at gmail.com
Tue Mar 3 11:03:16 EST 2009
During a run of a performance test we noticed a fairly significant increase
in query time for queries involving very large numbers of cells. We
actually hadn't run this particular test in nearly a year, so the comparison
is between changelist 10915 and 12403.
The query is ridiculously large--nearly 200K tuples, intersected with 12
measures. With 10915 this query ran in a little over an hour. With 12403
it runs for over 5 hours.
I haven't investigated much yet. I'm going to create simple Foodmart query
to try to reproduce, and then I'll try to narrow down where the bottleneck
is. I wanted to post, though, in case anyone has thoughts about this.
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