BPC Performance with large number of dimensions's members

Question

Hi,
I would like to know if there is a limitation on the number of members in one dimension. This dimension, named PROJET, is often used in expansion on our input schedule reports (to retrieve the projects which belong to the entity entered in the current view).
With approximate 2500 members in this dimension, the report takes about 4 minutes to be expansed (or even open).
We have 8 dimensions with few to 300 members. The PROJECT dimension is the biggest in terms of members's number.
Thank you in advance for your feedback !
Helene

Answer 1

Hi Helene,
With 3,000 members you should not be experiencing these problems, if your report is designed properly.
I'm running BPC 5.1 SP8 on SQL 2005, with a dimension containing 22,000 members. Client PC's are typical (XP, Excel 2007, 1 or 2 gig RAM).
Using EVDRE and this dimension expanding on the rows, most reports & input schedules can expand & refresh in the range of 10 to 30 seconds.
The faster times are when I use a row expansion memberset using dimension properties, such as Active="X". The slower times are when the memberset is hierarchy-based, such as BAS.
If you're using a dynamic template (one using EVEXP for the expansion) then you should start over using EVDRE. It will be much faster, particularly if you optimize your row expansion.
It's often a good idea to add dimension properties specifically for the purpose of optimizing the report expansion, if the dimension has thousands of members. I sometimes go as far as to add properties which mimic the hierarchy (MyLevel2, MyLevel3, etc) just for this purpose.