Using the channel initiator trace

The channel initiator trace can help to determine why a problem is happening in the CHIN address space, whether the cause of the problem is in IBM® MQ, the operating system, or the network.

About this task

See Figure 3 for information about how to get a dump of the channel initiator address space. Note that dumps produced by the channel initiator do not include trace data space. The trace data space, which is called CSQXTRDS, contains trace information. You can request this by specifying it on a slip trap or when you use the dump command.

Procedure

To run the trace, use the START TRACE command.
You can also set this trace to start automatically using the TRAXSTR queue manager attribute. For more information about how to do this, see ALTER QMGR.
To display this trace information, enter the IPCS command:
```
LIST 1000. DSPNAME(CSQXTRDS)
```
To format the trace, use the command:
```
CTRACE COMP(CSQXssnm)
```
where ssnm is the subsystem name.