Controlling the volume of traces
Control the volume of the traces using the VOLUME parameter on the /TRACE TABLE command.
The parameter can be set to high, medium, low, or error, where high generates the largest volume of trace entries, and error generates the smallest volume of trace entries.
For details about the /TRACE command parameters, see IMS Version 15.2 Commands, Volume 2: IMS Commands N-V. For details about the OPTIONS statement in the DFSVSAMP or DFSVSMxx data set, see DFSVSMxx member of the IMS PROCLIB data set.
Recommendation: Ensure that your IMS environment is running with the following traces on at all times:
- Dispatcher
- DL/I
- Lock
- Scheduler
None of these traces causes a noticeable performance impact,
and each of these can be helpful to you in diagnosing various problems
that might occur in your environment.
Note: The DL/I and LOCK traces
are set on as a default at IMS initialization.