Use of caches.

[Mike Austin]

I was just reading threads about the use of caches.

OK.. I have about 100 categories that I want to bitwise AND together with
different searches to get category counts.  After the user selects a
category, they will be using other facets based on the particular category.
I was planning to keep my own structure of bitsets for the categories and
let solr handle all other caching with the default filterCache.  My question
is: Should I keep my own structure for the 100 bitsets because I always want
these to be around or should I do it another way with a solr defined user
cache?

Thanks