Local system queue area (LSQA)

This area generally contains the control blocks for storage and contents supervision. Depending on the release level of the operating system, it can contain subpools 233, 234, 235, 253, 254, and 255.

The total size of LSQA is difficult to calculate because it depends on the number of loaded programs, tasks, and the number and size of the other subpools in the address space. As a guideline, the LSQA area usually runs between 40 KB and 170 KB, depending on the complexity of the rest of the CICS® address space.

The storage control blocks define the storage subpools in the private area, describing the free and allocated areas within those subpools. They can consist of such things as subpool queue elements (SPQEs), descriptor queue elements (DQEs), and free queue elements (FQEs).

The contents management control blocks define the tasks and programs in the address space, such as task control blocks (TCBs), the various forms of request blocks (RBs), contents directory elements (CDEs), and many more.

CICS DBCTL requires LSQA storage for DBCTL threads. Allow 9 KB for every DBCTL thread, up to the MAXTHRED value.