Because it runs while the system is running, it can affect the performance of the system, and is therefore very configurable in order to record the specific types of events that might be needed for different types of problems. Ideally, production systems should be able to perform adequately with at least the minimum tracing enabled.
Auxiliary trace is usually configured from the Enterprise Server Admin Console (i.e. ‘Aux Trace Active’), but can also be configured using the ‘CTRA’ transaction from a 3270 session. Trace information is written to the trace files CASAUXTA and CASAUXTB, and the amount of information output is controlled by the setting of specific trace flags (e.g. Application (API), Storage Control (SCP), and Application Container (RTS)).
To view a video on the Micro Focus YouTube channel, on how to enable AUX tracing for Enterprise Server, click here.