System LX usage

Each defined WebSphere MQ subsystem reserves one system linkage index (LX) at IPL time, and a number of non-system linkage indexes when the queue manager is started. The system linkage index is reused when the queue manager is stopped and restarted. Similarly, distributed queueing reserves one non-system linkage index. In the unlikely event of your z/OS system having inadequate system LXs defined, you might need to take these reserved system LXs into account.