Queue manager private region storage usage

The largest use of private region storage is for buffer pools. Each buffer pool size is determined at queue manager initialization, and storage is allocated for them when a page set using that buffer pool is connected. The ALTER BUFFPOOL command allows the sizes of buffer pools to be dynamically changed. Other substantial use of private storage (due to potential multiplicity and longevity rather than size) are:

• Messages stored on indexed queues

• Open handles

• Long running units of work containing large, or many messages.

A periodically issued message, CSQY220I indicates the amount of private region storage in use, and the amount remaining.