IEAH802I System trace Branch option is on, but it has not been active as long as the checkowner_or_installation-defined duration. It was activated on datemdy4 at timehmsc.
Explanation
Check(IBMSYSTRACE, SYSTRACE_BRANCH) found no exception condition. System trace branch option has been turned on, it has not been continuously active for longer than the defined duration. However, leaving Branch tracing (BR = ON) can affect the system's performance. Use branch tracing only for short periods of time to solve a specific problem; do not use Branch tracing as the default for system tracing on your system. When the defined duration is exceeded, message IEAH801E will be issued.
- datemdy4
- The local date when the first TRACE Branch option was set on.
- timehmsc
- The local time when the first TRACE Branch option was set on.
System action
The system continues processing but performance is worse than when branch tracing is off.
Operator response
n/a
System programmer response
If system tracing of branch instructions is not required, issue system command TRACE ST,BR=OFF to turn branch tracing off. Because tracing BRANCH instructions tends to significantly increase the number of trace entries being generated, you can increase the size of the trace tables when you turn tracing on.
Problem determination
n/a
Source
SYSTRACE (System Trace)
Module
IEAVTSHC
Routing code
n/a
Descriptor code
n/a
Automation
n/a
Reference Documentation
See z/OS MVS Diagnosis: Tools and Service Aids for more information on System Trace about how to customize System Trace. See z/OS MVS System Commands for information about the TRACE and DISPLAY TRACE commands.