Tuning the Intelligent Management cell

Start here for a summary of key performance tuning parameters for your Intelligent Management configuration.

• Assign all URL patterns from an application to transaction classes.
  Any URL that does not map to a transaction class is classified as best effort, also called discretionary. Transaction classes are part of service policies. To change transaction classes from the administrative console, select Operational policies > Service policies > service_policy_nameTransaction classes.
• Check service policy goals against the performance of the service class and adjust the goals if necessary.
  For example, your service policy has an average response goal of 200 milliseconds and the measured average service time is 300 milliseconds. Consider adjusting your goal to 500 milliseconds.
• To change the application placement controller speed for loading changes, adjust the following properties:
  • Configure the minimum time between placement changes in the administrative console. Select Operational policies > Autonomic managers > Autonomic controllers > Application placement controller. Set the minimum time between placement changes to a suitable value.
  • Configure the application placement controller cycle from the administrative console. Select Operational policies > Autonomic managers > Autonomic controllers > Application placement controller > Custom properties. Add a custom property with the name minControlCycleLength and a suitable value in minutes.
• Adjust the control cycle length.
  The control cycle length minimum property determines how quickly the autonomic request flow manager (ARFM) reacts to load changes. You can change the ARFM control cycle length. From the administrative console select Operational policies > Autonomic managers > Autonomic request flow manager. Set the control cycle length minimum property to a suitable value.
• Adjust ARFM to limit the maximum use of the nodes.
  1. In the administrative console, select Operational policies > Autonomic managers > Autonomic request flow manager.
  2. Set the Maximum CPU Utilization property. Higher values allow better resource use, lower values ensure more robust operation.