How about PD, FODC, TRC, core, EcuRep, DIAG, caem, lock, mem, log, OPM, CPU, EDU, app, support, and many more terms in a single paper? The newly published Best Practices: Troubleshooting DB2 servers looks into what should be done to handle issues with DB2. It discusses what data to collect, how DB2 is actually configured to dump the right data, how to exchange that information with IBM, and how to look into typical scenarios on your own.
Because of what is covered, the depth and the embedded links to even dig deeper into troubleshooting topics, it is a good read for beginners and experienced DB2 users.
BTW: You can find all DB2 Best Practices here.