What is node eviction?
Node eviction in RAC is done when a heartbeat indicates that a node is not responding,
and the evicted node is re-started to make it a part of cluster.
Causes for RAC node eviction:
Node eviction on Oracle RAC environment can be due to any of the below reasons.
– A failure of any of the major hardware components (CPU, RAM, network interconnect).
– A server that is experiencing RAM swapping.
– When communications to the voting disk is interrupted, causing the disconnected node to be evicted and re-boot.
– Database or ASM hang condition.
Below is the list of important log files to review in case of a node eviction
– Clusterware alert log
– Database alert log
– CSSD agent logs
– CSSD monitor logs
– System Message logs (/var/log/messages)