This change should be done in the
general.properties file. The relevant property is:
log4j.appender.logfile.MaxFileSizeFor instance,
log4j.appender.logfile.MaxFileSize=10000KBmeans that the log file will have a maximum size of
10 MB.
Once you make your change in
general.properties, WorldServer should be restarted for the change to take effect.
If you work on a WorldServer 11 environment, remember to apply your change to the relevant folder(s) where the general.properties file is stored. See also:
Configuring .properties files starting from WorldServer 11