OAM records descriptive information about each object that is stored. If your application stores a large number of objects, the amount of descriptive information can become excessive, causing performance degradation. OAM does not separate any descriptive information for objects in the same collection. It may separate descriptive information for objects in different collections, making it possible to improve performance by reducing the size of the accumulated descriptive information.

If you decide to separate one set of objects from another set, place them in different collections within the storage group. To ensure that collections remain separate, assign them to separate storage groups. System variables, including ACS routines, determine physical separation of objects. The number of objects your application stores may lead to your decision to separate objects by collections.