"Failed to acquire global enqueue."
*Cause: A prior error occurred on one of the instances in the cluster.
Typically errors are caused by shared pool resource contention.
*Action: Check for and resolve prior errors on all instances in the cluster.
If there is shared pool resource contention, increase the
SHARED_POOL_SIZE, DML_LOCKS, PROCESSES, TRANSACTIONS,
CLUSTER_DATABASE_INSTANCES and PARALLEL_MAX_SERVERS initialization