SMF Halt Processing

Use the HALT command to record statistics before stopping the operating system. After you have stopped all subsystem processing (through the use of the appropriate subsystem command) and the system notifies you that all system activity has completed, you can issue the HALT EOD command to ensure that important job and system statistics and data records in storage are recorded. For more information on the Halt command, see z/OS MVS System Commands.

When the operator issues the HALT EOD command, the following actions occur:

Data in the SMF buffer is written to the active SMF data set or logstream.
For SMF data set recording, a type 19 record is created for each online direct access device (if a type 19 record was selected to be recorded in the SMFPRMxx parmlib member).
For SMF data set recording, the SMF data sets are switched so that the operator can dump the previously active data set.