I would recommend taking a look at the data design before throwing more hardware at the problem. 80-160 dimensions in a query seems a bit excessive. Could it be you have an example of a one-size fits all data mart? I suggest getting your data architect/business analyst involved to gain an in-depth appreciation for how that query result set is being used, then look at the data architecture for areas where the design can be improved.
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This was first published in January 2004