Knowing why a relay server failed to join the pool can be important. This
is typically an issue which must be investigated after it occurred, so
having logs available is useful.
Running with -debug permanently enabled is impractical, due to the amount
of traffic that is generated, particularly when data is being transferred.
Logging is limited to at most one message per minute, although one message
per hour is more likely.
Jakob Borg
Antony Male
Audrius Butkevicius