Cache Mode 5 - BLOB/ Cluster Enhanced - Variables

Question

Hello,
I have a very large query that I need to cache for performance.
I'm using cache mode 5 - BLOB/Cluster Enhanced.
I see that for variables in Char Restrictions area, it creates a new entry in RSRCACHE under my query under new Variables/Hierarchies section. But for variables in default values section it creates new selection entry in cache.
Therefore, I have moved all my variables (mandatory + optional) into default values section. Now when I run query with say single company code (which is single mandatory variable), it builds cache as required. Now when i rerun query for same company code and specific material type (optional variable) (which is actually subset of first cache that we just built), it actually doesn't hit the cache, instead creates new cache entry as selection under our query name.
Any ideas why subset of "Optional variables" are not hitting cache in my case? Any guidelines regarding how variables should be placed for cache query?
Thanks.
Abhijeet

Answer 1

I think I found my own answer. Here are the findings:
1. Subset of navigation will hit cache ONLY IF we are running for variables / fields that are in rows. In my case I was adding a value for variable which was in free chars and not in rows.
2. If I have built two cache objects - say for plants 1 - 1000 and plants 1001 - 2000...and then I run for plants 500 - 1500, then it won't utilize both cache objects...Instead it will create a new one. BI is not intelligent enough to consolidate two cache objects at this moment.