DFSMShsm uses the cell-pool (CPOOL) function of MVS™ to obtain and manage virtual storage in its address space for the dynamically obtained storage for certain high-usage modules, and for data areas DFSMShsm frequently gets and frees. The CELLS parameter provides the cell sizes for five cell pools.

For more information about DFSMShsm storage, see Adjusting the size of cell pools.