Monitoring a subsystem

Because subsystems are important to the daily activity done on your system, it is important that you monitor the activity in your subsystems.

Within a subsystem description you can specify the number of jobs that can run at one time in the subsystem by setting the maximum active jobs value. As the amount of work on your system increases you might want to change the maximum active jobs value in your subsystem. The number that you supply here should be set so that the available resources are properly utilized. Increasing the number of active jobs without increasing the resources available can hurt performance on your system.

To check the maximum active jobs value of your subsystem, you can use either IBM® Navigator for i or the character-based interface.

IBM Navigator for i

Expand Work Management > Active Subsystems.
Right-click the subsystem which you want to monitor.
Select Properties.
Note: Make sure you set this option very carefully. If you set maximum active jobs value too high, you might make your system perform slowly. However, if you set your maximum active jobs too low, your work might start to bottleneck and slow performance.

Character-based interface

Command: Display Subsystem Description (DSPSBSD)

Select Option 1: Operational attributes, to see the value for maximum jobs in the subsystem.