4.4.3 Changing the log file size
The operational status of Performance Management is output to Performance Management's own log file. This log file is called the common message log. For the common message log, two files, each with 8,192 KB capacity by default, are used. Modify this setting if you want to change the file size.
For details, see the chapter explaining installation and setup in the JP1/Performance Management Planning and Configuration Guide.