Periodic health evaluation of SF Oracle RAC clusters
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Periodic health evaluation of SF Oracle RAC clusters

SF Oracle RAC provides a health check utility that evaluates the components and configuration in an SF Oracle RAC cluster. The utility when invoked gathers real-time operational information on cluster components and displays the report on your system console. You must run the utility on each node in the cluster.

The utility evaluates the health of the following components:

The health check utility is installed at /opt/VRTSvcs/rac/healthcheck/healthcheck during the installation of SF Oracle RAC.

The utility determines the health of the components by gathering information from configuration files or by reading the threshold values set in the health check configuration file /opt/VRTSvcs/rac/healthcheck/healthcheck.cf

The utility displays a warning message when the operational state of the component violates the configured settings for the component or when the health score approaches or exceeds the threshold value. You can modify the health check configuration file to set the threshold values to the desired level.

The health checks for the VCSMM, I/O fencing, PrivNIC, MultiPrivNIC, and Oracle Clusterware components do not use threshold settings.

Note:

You must set the ORACLE_HOME and CRS_HOME parameters in the configuration file as appropriate for your setup.

Table: Setting threshold values provides guidelines on changing the threshold values.

Table: Setting threshold values

Requirement

Setting the threshold

To detect warnings early

Reduce the corresponding threshold value.

To suppress warnings

Increase the corresponding threshold value.

Warning:

Using very high threshold values can prevent the health check utility from forecasting potential problems in the cluster. Exercise caution with high values.

Note:

You can schedule periodic health evaluation of your clusters, by scheduling the utility to run as a cron job.

See Scheduling periodic health checks for your SF Oracle RAC cluster.

For detailed information on the list of health checks performed for each component, see the appendix List of SF Oracle RAC health checks.

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