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Using trace on UNIX systems

UNIX systems use the following commands for the WebSphere MQ client trace facility:

strmqtrc -e

to start early tracing

endmqtrc -e

to end early tracing

dspmqtrc <filename>

to display a formatted trace file

You must use the -e parameter when tracing a WebSphere MQ client. For more information about the trace commands, see the WebSphere MQ System Administration Guide.

The trace facility uses a number of files, which are:

• One file for each entity being traced, in which trace information is recorded

• One additional file on each machine, to provide a reference for the shared memory used to start and end tracing

• One file to identify the semaphore used when updating the shared memory

Files associated with trace are created in a fixed location in the file tree, which is

/var/mqm/trace.

All client tracing takes place to files in this directory.

We can handle large trace files by mounting a temporary file system over this directory.

 

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