John Parejko may you please review this?
Documentations of the logging usage have just been added to our Developer Guide at: https://developer.lsst.io/coding/logging.html
If you see anything that should be made clearer I'd appreciate feedbacks.
meas_algorithms/tests/testCr.py is a cute example of fine-level tracing (the maximum number of tracing levels used I've found so far in the current stack!). In debugging, one can adjust the verbosity number in logUtils.traceSetAt("algorithms.CR", NUMBER) without recompiling and see more or fewer messages from the CR code (src/CR.cc). From
RFC-203 I understand that is one main use case of tracing.