All LiV Pi processes have logs files where error and debug info is printed during operation.
Out of the box, the log level in the Python logs "logging.ini" configuration file is set to INFO, so you will see a lot of data in your logs. If you don't need that much info, you can change the level to WARNING or ERROR.
If the log file is getting really large, you can modify the "args=('livLCD.log', 'a')" line to "args=('livLCD.log', 'w')": this way instead of appending new lines in the log file, the log is created every time that LiV process starts.
More on Python logs here:
https://docs.python.org/2/library/logging.html