You can use tools like Notepad++ which are very helpful in opening big and large debug log files . Tips to search for issue in log files - search using keywords like errors , fail , unable , exception , return value is 2 (for business functions 2 means error 1 means warning) ,pretty much should help in finding issues . Start dumping to see BSFN params input output values etc . Performance WB to pass jdedebug log through them to see which proces sis taking time to decide on sequencing , indexes , moving to NER etc . One of everest software OWDLC will help in getting logs locally too for applications as well , easy to use , clean , this tool also helps in clearing cache , siz dddict files and all ...
Hope this helps and best of luck .