Best ways to create rpd or reports if we have data in more fact tables

I have fact and dimensional data in one or more different tables. Then each logical table source represents one data segment.Please suggest me some methods or ways like fragmentation through which i can use them in creating rpd and report and main problem here is facts too large contains 25 million records.But adding tables in BMM layer effecting performance so can anyone other ways doing it in database side.
Thanks in advance
Edited by: user2989722 on Dec 3, 2009 3:09 PM

hi,
For the fragmentation you can create on dimension .The procedure is clearly explained in this blog
http://108obiee.blogspot.com/2009/01/fragmentation-in-obiee.html
http://www.rittmanmead.com/2007/06/19/obiee-data-modeling-tips-2-fragmentation/
For the performance point of view you can create a Materialized view (based on columns that your report is using) so that it will hit that particluar view instead of hitting whole table(25million records table) please look into this post
Re: Materialized views in OBIEE
thanks,
saichand.v

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