Setting the Interval Between Fault Monitor Probes

To determine whether a resource is operating correctly, the fault monitor probes this resource periodically. The interval between fault monitor probes affects the availability of the resource and the performance of your system as follows:

• The interval between fault monitor probes affects the length of time that is required to detect a fault and respond to the fault. Therefore, if you decrease the interval between fault monitor probes, the time that is required to detect a fault and respond to the fault is also decreased. This decrease enhances the availability of the resource.

• Each fault monitor probe consumes system resources such as processor cycles and memory. Therefore, if you decrease the interval between fault monitor probes, the performance of the system is degraded.

The optimum interval between fault monitor probes also depends on the time that is required to respond to a fault in the resource. This time depends on how the complexity of the resource affects the time that is required for operations such as restarting the resource.

To set the interval between fault monitor probes, set the Thorough_probe_interval system property of the resource to the interval in seconds that you require.