Universal Messaging realm servers support high-performance spin locks. If you installed a realm server on a machine that is equipped with more than four CPUs, you can configure the realm server to consume the available CPUs by enabling spin locking. To do so, go to the Software AG_directory /UniversalMessaging/server/realm_server_name/bin directory, open the nserver.conf file, and add the line wrapper.java.additional.19=-DCORE_SPIN=true