Tracing events in z/OS UNIX
Your installation specifies events to be traced in CTnBPXxx parmlib members. Each member should specify one or more events; keep the number of events small because tracing affects system performance. The installation can filter the events by address spaces, user IDs, and level of detail.
The CTnBPXxx member to be used when the OMVS address space is initialized
is identified on the CTRACE parameter of the BPXPRMxx member. You
also specify the size of the trace buffers in the CTnBPXxx member
used when the system is IPLed. You can change the buffer size while z/OS UNIX is running.
The buffer can be 16 KB minimum to 32 MB maximum. If you need a different
buffer size, change buffer size (BUFSIZE) in a CTnBPXxx member and
issue:
TRACE CT,ON,COMP=SYSOMVS,PARM=CTnBPXxxAn operator starts and stops tracing events in the z/OS UNIX system
with the commands:
TRACE CT,ON,COMP=SYSOMVS,PARM=CTnBPXxx
TRACE CT,OFF,COMP=SYSOMVSThe operator can resume full tracing, with the previously used
CTnBPXxx parmlib member or a different member, with the command:
TRACE CT,ON,COMP=SYSOMVS,PARM=CTnBPXxxThe PARM operand specifies the parmlib member with the tracing options.