The use of hiperspace consumes system resources such as expanded and auxiliary storage. Programmers responsible for tuning and maintaining MVS™ can control the use of these resources. Through the system management facility (SMF) installation exit IEFUSI, an installation can set limits on the amount of virtual storage that programs in each address space can use for data space and hiperspace.

See z/OS MVS Installation Exits for information on using IEFUSI.