System management facilities (SMF) is a component of z/OS® that provides the ability to run multiple workloads at the same time within one z/OS image or across multiple images. SMF job and job step accounting records identify processes by user, process, group, and session identifiers. Fields in these records also provide information about resources used by the process. SMF file system records describe file system events such as file open, file close, and file system mount, unmount, quiesce, and unquiesce.

Use the JWT, SWT, or TWT value in the SMF parmlib member SMFPRMxx in conjunction with the BPXPRMxx PWT value to specify when to time out an idle address space that is waiting for terminal activity. For more information, see SMFPRMxx.