Hello Everyone,
When tuning your Performance Point Dashboard solutions,
Keep in mind about a known bug, reported by Nick Barclay regarding the use of "0" Cache Intervals within Data Sources.
This Issue is referred to SP1.
Further read, could be found at Nick Barclay's blog:
http://nickbarclay.blogspot.com/2008/06/pps-m-sp1-datasource-cache-bug.htm
Regards,
Eran