Operation of the Sun Cluster HA for SAP DB Fault Monitors

To determine whether SAP xserver and the SAP DB database instance are operating correctly, the Sun Cluster HA for SAP DB fault monitors probe these resources periodically.

During a probe, the SAP DB fault monitor performs the following operations:

1. The SAP DB fault monitor determines whether the SAP DB database instance is online.

2. If the SAP DB database instance is online, the SAP DB fault monitor determines whether the parent kernel process of the SAP DB database instance is running. You can control how the fault monitor responds if the parent kernel process is not running. For more information, see Forcing the SAP DB Database Instance to Be Restarted if the Parent Kernel Process Is Terminated.

3. The SAP DB fault monitor determines whether SAP xserver is available. This fault monitoring supplements the fault monitoring that the SAP xserver fault monitor provides.

During a probe, the SAP xserver fault monitor determines whether SAP xserver is available.

The SAP DB fault monitor responds to the following faults in SAP DB:

• A status of the SAP DB database instance that is not ONLINE, for example, OFFLINE or ADMIN

• Unexpected termination of the parent kernel process of the SAP DB database instance

The SAP DB fault monitor also responds to the unavailability of SAP xserver. This fault monitoring supplements the fault monitoring that the SAP xserver fault monitor provides.

The SAP xserver fault monitor responds to following faults:

• Unavailability of SAP xserver

• Persistent system errors