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Understand OlapQueryLog Dataset

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Hi everybody,
I would like to create manuals aggregations to improve some MDX requests. (in SSRS Reports)
When I'm reading OlapQueryLog table, i see this Dataset:

10000011001000000,00000000000000000000....

1000002300400....

The first dimension is a time dimension with these selected attributes:

  1. Days
  2. Months
  3. Trimester
  4. Year

=> All Attributes is designed like hierarchy into "Attribute Relationships" of the "Time dimension"

  • I create aggregation with "Day attribute" and it improve performance but not enough to speed up my request.
  • I create 3 another aggregations : One on "Day attribute", one on "Month", one on "Year" => Nothing change
  • I create another one with "Days", "Months", "Trimester" and "Year" (I don't worry about the BIDS warning on the unvalidated Aggregation) => Nothing change

    My questions:
How to improve performance for this example of dataset?

Thanks all for your responses.
Arnaud

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