query performance

We have developed an infoset which contains one infocube and 3 ods. The performance of the report is very very slow. Can any throw some light to improve the performance of the report.

FYI- the report has many key fields with more filter values and many characteristics . This cannot be avoided as this is necessary for us.

Edited by: Pooja S on Mar 27, 2009 5:51 AM