5 Monitoring System Metrics for Cluster Nodes

This chapter explains the methods to monitor Oracle Clusterware.

Oracle recommends that you use Oracle Enterprise Manager to monitor everyday operations of Oracle Clusterware.

Cluster Health Monitor monitors the complete technology stack, including the operating system, ensuring smooth cluster operations. Both the components are enabled, by default, for any Oracle cluster. Oracle strongly recommends that you use both the components. Also, monitor Oracle Clusterware-managed resources using the Clusterware resource activity log.

• Monitoring Oracle Clusterware with Oracle Enterprise Manager
  Use Oracle Enterprise Manager to monitor the Oracle Clusterware environment.
• Monitoring Oracle Clusterware with Cluster Health Monitor
  You can use the OCLUMON command-line tool to interact with Cluster Health Monitor.
• Using the Cluster Resource Activity Log to Monitor Cluster Resource Failures
  The cluster resource activity log provides precise and specific information about a resource failure, separate from diagnostic logs.