What is the performance overhead of session replication in islands?
The replication is best effort and is asynchronous. Thus, there is not much overhead on the OC4J instance that is replicating the data. However, the receiving OC4J instances do have to take the interrupt to copy the new data to memory, and thus maybe impacted. Hence, it is recommended to keep the island size small, and only put coarse objects in the session state.
