The SAMPLING-DEVICE monitoring program supplies the following utilization data of devices:
Number of inputs/outputs and volume of data transferred
Length of device queue and number of parallel processed inputs/outputs
Hardware and software service time
Data of IOPT function (IORM utility)
The monitoring program is started when the SM2 subsystem is started without the recording of service times.
The monitoring program cannot be terminated using the STOP-MEASUREMENT-PROGRAM TYPE=*ALL statement, but only with the STOP-MEASUREMENT-PROGRAM TYPE=*SAMPLING-DEVICE statement.
If the monitoring program is used for parallel access volumes (PAV), the following applies:
Only base devices are output in the DEVICE DISK report.
The monitored data refer to the base device and the assigned alias devices.
At the SM2GDAT data interface the data of the alias devices are also output.