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IEAH801E
System trace Branch option has been active for a longer time than the checkowner_or_installation-defined duration. It was activated on datemdy4 at timehmsc.

Explanation

Check (IBMSYSTRACE, SYSTRACE_BRANCH) found an exception condition. System Trace is using the BR=ON parameter of the TRACE command and has been active for a longer time than the defined duration. The trace runs continually, and leaving Branch tracing (BR = ON) can affect your system performance. Use branch tracing only for short periods of time to solve a specific problem and do not use branch tracing as the default for system tracing on your system. BR=ON is intended for use in system software problem determination and diagnosis situations only.

In the message text:
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

Report the issue to the system programmer.

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 tend 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.

Parent topic: IEAH messages
End of change