In dependence of the setting of log-level (error, warn, info, debug) in configuration file factory.ini the size of main logfile scheduler.log will growth more or less fast. To limit the size of scheduler.log it is recommended to run the housekeeping job JobSchedulerRotateLog continiously.
It rotates scheduler.log. That means that the current content will be saved in a zipped file (marked with a timestamp) and the afterwards the content of scheduler.log will be deleted.