Serviceability refers to the ease and extent of changes that can be affected without affecting availability. Oracle Coherence helps to increase an application's serviceability by allowing servers to be taken off-line without impacting the application availability. Those servers can be serviced and brought back online without any end-user or processing interruptions. Many configuration changes related to Oracle Coherence can also be made on a node-by-node basis in the same manner. With careful planning, even major application changes can be rolled into production - again, one node at a time - without interrupting the application.