3 Collecting Operating System Resources Metrics

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

This chapter describes how to use Cluster Health Monitor and contains the following sections:

• 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 by running the Grid_home/bin/diagcollection.pl script on the node.
• 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.