An Illustration of DTrace By Example
Peter van den Bogaard's January article, DTrace by Example: Solving a Real-World Problem, first cites a pain of an example scenario with logins on secure shells (SSH). It then shows you, step by step, how to track, diagnose, and resolve the problem with DTrace, the dynamic tracing framework in the Solaris OS.
That's an eye-opening illustration of the DTrace capability. Good job!