Invoking a Monitor › Invoke a Monitor from the TSO Client › Monitor Request

Monitor Request

When you invoke a monitor definition, it is called a monitor request. A monitor request is active from the time you invoke the monitor definition until one of the following situations occurs:

• Observations and sampling are complete.
• The monitor request is canceled.
• The schedule expires.

If the target is active, CA Mainframe Application Tuner starts making observations and collecting sample data immediately. If CA Mainframe Application Tuner cannot find the target at the time you invoke the monitor definition, it sends a message back to your TSO session that your request was deferred, and the monitor request status on the Monitor Definition panel is shown as Waiting.

CA Mainframe Application Tuner continuously monitors the job step initiation activity on the z/OS system on which it is running. When CA Mainframe Application Tuner detects that the requested target is available, it activates the observation and sampling process automatically. The monitor starts immediately, unless you specified a delay after step start. When CA Mainframe Application Tuner begins monitoring a target address space, the status of the request on the Monitor Definition panel switches from Waiting to Active.

After you invoke a monitor request, you no longer need to be connected to CA Mainframe Application Tuner or even logged on to TSO. However, if you remain connected to TSO/ISPF, CA Mainframe Application Tuner notifies you when the monitoring terminates.

See the Installation Guide for more information.