Debugging Node Eviction Issues

One of the most common and complex issues in Oracle RAC is performing the root cause analysis (RCA) of the node eviction issues. Oracle evicts a node from the cluster mainly due to one of the following three reasons:

image The node is not able to complete the network heartbeat (NHB).

image The node is not able to complete the disk heartbeat (DHB).

image The node does not have enough CPU to perform either of the heartbeat operations. ...

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