As an example here’s my log “stats”. Don’t wonder those huge warning and error line counts because I’m testing the new modbus binding at the same time. Modbus openHAB2 binding available for alpha testing
13:20:01.997 [DEBUG] [ng.logreader.handler.LogReaderHandler] - Log rotated: 2017-11-12 20:09:49.028
13:20:03.334 [DEBUG] [ng.logreader.handler.LogReaderHandler] - Last line: 2017-11-24 13:20:02.226
13:20:03.335 [DEBUG] [ng.logreader.handler.LogReaderHandler] - Total log lines: 83929. New lines since last read: 83929
13:20:03.336 [DEBUG] [ng.logreader.handler.LogReaderHandler] - New warning lines: 25843
13:20:03.365 [DEBUG] [ng.logreader.handler.LogReaderHandler] - New error lines: 890