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.