Steps for gathering additional information for performance
problems
Collect and analyze messages and logrec records about the problem.
Use time stamps to select messages and software, symptom, and hardware
records for logrec. Look at any messages or records that occurred
before and during the time the problem was first reported. Look in
the following:
The job log
A TSO/E user's ISPF transaction log or session manager log
The system log (SYSLOG) for the console with master authority
or the alternate console
VERBEXIT MTRACE dump output, which shows the buffer for system
messages
VERBEXIT LOGDATA dump output, which formats the logrec buffer