Performance of a Report Based On VirtualProvider

Dear BW experts,

We have created a new BEx 3.x report, which contains about 6 queries, and 2 pre queries.

The report runs very slowly, the upload time is about 40 seconds.

The report itself contains one tab with 11 tables.

The MultiProvider that the queries are based on is a virtual InfoCube, so we can't use aggregates.

Could someone advice us how to optimize the performance of the report?

Thanks you in advance.

Best Regards,

Inbal.