https://www.ibm.com/docs/en/ims/15.2.0?topic=monitoring-zos-generalized-trace-facility-gtf
IMS 15.2 - System administration - z/OS Generalized Trace Facility (GTF)
Use the z/OS generalized trace facility (GTF) to record a wide range of system-level events. The trace activity is controlled from the z/OS system console...
generalized trace facility15 2system administrationims