System Resource Monitoring

By monitoring system resource usage, you can do the following:

• Collect data that reflects how a service that is using specific system resources is performing.

• Discover resource bottlenecks or overload and so preempt problems.

• More efficiently manage workloads.

Data about system resource usage can help you determine the hardware resources that are underused and the applications that use many resources. Based on this data, you can assign applications to nodes that have the necessary resources and choose the node to which to failover. This consolidation can help you optimize the way that you use your hardware and software resources.

Monitoring all system resources at the same time might be costly in terms of CPU. Choose the system resources that you want to monitor by prioritizing the resources that are most critical for your system.

When you enable monitoring, you choose the telemetry attribute that you want to monitor. A telemetry attribute is an aspect of system resources. Examples of telemetry attributes include the amount of free CPU or the percentage of blocks that are used on a device. If you monitor a telemetry attribute on an object type, Sun Cluster monitors this telemetry attribute on all objects of that type in the cluster. Sun Cluster stores a history of the system resource data that is collected for seven days.

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 that you choose.