The Message Queue logger takes information generated by broker code and the metrics generator and writes that information to standard output (the console), to a log file, and, on SolarisTM platforms, to the syslog daemon process in case of errors.
You can set broker properties to specify the type of information gathered by the logger as well as the type written to each of the output channels. In the case of a log file, you can also specify the point at which the log file is closed and output is rolled over to a new file. Once the log file reaches a specified size or age, it is saved and a new log file created.
For details about how to configure the logger and how to use it to obtain performance information, see Configuring and Using Broker Logging in Sun Java System Message Queue 4.3 Administration Guide.