Use Cluster Health Monitor to collect diagnostic data to analyze performance degradation or failures of critical operating system resources.

You can now configure Oracle Cluster Health Monitor to operate in local mode to report the operating system metrics using the oclumon dumpnodeview command even if you have not deployed GIMR.

In local mode, you can get only the local node data. The local mode has limited Oracle Cluster Health Monitor functionality in the deployments where you have not installed GIMR. In earlier releases, Oracle Cluster Health Monitor required GIMR to report the operating system metrics using the oclumon dumpnodeview command.

• Understanding Cluster Health Monitor Services
  Cluster Health Monitor uses system monitor (osysmond) and cluster logger (ologgerd) services to collect diagnostic data.
• Collecting Cluster Health Monitor Data
  Collect Cluster Health Monitor data from any node in the cluster.
• Using Cluster Health Monitor from Enterprise Manager Cloud Control
  Histograms presented in real-time and historical modes enable you to understand precisely what was happening at the time of degradation or failure.