Do you want to measure the CPU utilization of your z/VSE workload ?
Ingolf24 120000DRN3 Comment (1) Visits (4474)
Besides the performance monitors from vendors there are also z/VSE provided tools available - not so sophisticated than monitors, but good enough to understand the CPU utilization. .
1) The IUI "Display System Activity" dialog, which gives a snapshot of the actual CPU usage in total and by partition. CICS TS with IUI needs to be started. You can reach the display via the "z/VSE Function Selection" -> 3 - Operation -> 6 - System Status -> 1 - Display System Activity.
2) The Attention Routine (AR) command "QUERY TD", which displays the CPU utilization and non-parallel share of your workload on the system console. Before you start the monitoring for your peak hour(s), reset the system counters via the Attention Routine (AR) command "SYSDEF TD,RESETCNT". Now the monitoring period starts. After e.g. one hour enter the "QUERY TD" AR command.
3) The z/VS
If you plan a migration from one release to another, please measure the CPU utilization of your workload before and after the migration with one of the vendor products or the tools as described above. You can expect additional CPU time requirements of about 3 to 5% per release upgrade, e.g. zVSE 4.2 to z/VSE 4.3 about 3 to 5%, z/VSE 4.2 -> z/VSE 5.1 (one release skipped) about 6 to 10% dependent on your workload.