3.1 Understanding Cluster Health Monitor Services

Cluster Health Monitor uses system monitor (osysmond) service to collect operating system metrics.

About the System Monitor Service

The system monitor service (osysmond) is a real-time monitoring and operating system metric collection service that runs on each cluster node. The system monitor service is managed as a High Availability Services (HAS) resource.

osysmond persists the collected operating system metrics under a directory in ORACLE_BASE.

Metric Repository is auto-managed on the local filesystem. You can change the location and size of the repository.

• Nodeview samples are continuously written to the repository (JSON record)
• Historical data is auto-archived into hourly zip files
• Archived files are automatically purged once the default retention limit is reached (default: 200 MB)