The SYSTEM monitoring program provides important system-global and category-specific data.The most important aspect of these variables is that they can be obtained using event driven methods. These monitored values make it possible to assign values which are otherwise global by default (CPU, I/O) to individual categories, i.e. the category-related share of the load can be determined. For precise determination of category dilation, the SET-SYSTEM-PARAMETERS statement is required to include all devices in the monitoring process. In addition, detailed monitored data on queues is recorded. The monitored data is written to the SM2 output file; some of the values are displayed on screen in the
CATEGORY report.
The support of RSC IOs (x86 servers) of TD devices is not possible, because there is no connection between RSC IOs and tasks.
If the monitoring program is used for parallel access volumes (PAV), the following applies:
Base and alias devices can be selected.
If a base device is selected, the data refer also to the assigned alias devices.