11.6 System management for JMS This section takes a brief look at system management issues when using JMS applications. 11.6.1 JMS performance issues Some issues that play a role in JMS messaging performance are: Generic versus specific message structure Making the message structure more generic requires more translation and interpretation time at the sender and receiver ends. Making a message too specific reduces flexibility for even small changes in the message structure. Remember to create an error queue for messages that cannot be validated. Message persistence Using persistent messages requires writing the messages to disk, which takes time, reducing performance. Request/reply scenario In a request/reply scenario, it is important that the issue of blocking calls is dealt with correctly. Essentially, EJBs should only be used with appropriate request/reply timeouts and retries.