appserver log file monitoring

Hi All:
Am putting together a list of log files generated by progress that contain specific items/events that are of interest to a DBA. I have the db log file ads0.exp etc. However I was wondering if anyone has any views on the contents of the appserver log files (broker and/or server).

Mostly I leave the contents of those files to the developers so they can work out when their code is not working as expected. Anyone have any advice or suggestions of specific issue that may be logged in those files from a DBA point of view??