Tracing in a CMAS

The CICS® internal trace facilities must always be active in a CMAS.

When a CMAS initializes, CICSPlex® SM ensures that the CICS trace facility is active and the trace table is large enough. The minimum trace table settings, along with the CICS system initialization parameters that you must use, are in the following table:

Table 1. Trace table setting required by the CMAS
Trace variable	Required setting	System initialization parameter option
Internal trace	On	INTTR=ON
Trace table size	12 MB minimum	TRTABSZ=12288
Main trace	Off	SYSTR=OFF
User trace	On	USERTR=ON

If the CICS trace facilities cannot be activated with these settings, CMAS initialization is canceled and you receive an error message.

Additionally, the CICS AUXTRACE facility should be active (for user records only) in a CMAS. If this facility is not active when a problem occurs, it might be necessary to re-create the problem with the facility turned on.