By monitoring system resource usage through Sun Cluster software, you can collect data that reflects how a service using specific system resources is performing and you can discover resource bottlenecks or overload and so preempt problems and more efficiently manage workloads. Data about system resource usage can help you determine what hardware resources are under utilized and what applications are using a lot of resources. Based on this data you can assign applications to nodes that have the necessary resources and choose the node to which to fail over. This consolidation can help you optimize the way that you use your hardware and software resources.
If you consider a particular data value to be critical for a system resource, you can set a threshold for this value. When setting a threshold, you also choose how critical this threshold is by assigning it a severity level. If the threshold is crossed, Sun Cluster changes the severity level of the threshold to the severity level you choose. For more information about configuring data collection and threshold, see Chapter 10, Configuring Control of CPU Usage, in Sun Cluster System Administration Guide for Solaris OS.