JES2 provides a component tracing (CTRACE) function, SYSjes2, that is started automatically during initialization. SYSjes2 contains three sublevel traces that run continuously and concurrently; they are a JQE service trace, a JOE service trace, and a JES2 dispatcher service trace. Included in the various service traces for SYSjes2 are traces of calls to the JES2 macros, such as $#BUSY and $QBUSY. See z/OS MVS Diagnosis: Tools and Service Aids for a detailed description of this component trace.