Mentors to look for in cache

If a user requests recommendations before the sifter has found mentors for that user, the Preference Engine checks the cache for mentors for the user. Set <eng_instance_name>.db.engine.tune.max_cached_mentors to the number of potential mentors which it should consider for a given user. The default is 500. For example:
movie_pref.db.engine.tune.max_cached_mentors = 600