Hello,
I believe the main problem with logging is that we cannot know at coding time what is going to go wrong at runtime, so we cannot know what to log … That’s why some of us end up logging everything. If you have an easy access to the running software, you can little by little log your way out of the outages, you should end up with meaningfull logs on critical parts.
DTrace and runtime weaving AOP techniques provide another way. Define what you want to log at runtime when facing the bug.