log message before hibernation?

[Valient Gough]

Over the last few hours, the amount of tor traffic to/from my server has 
reduced by about 2 orders of magnitude.  There is nothing in the logs 
but this (probably because I had been changing accounting rules recently):

Jan 29 04:58:49.868 [warn] configure_accounting(): Mismatched accounting 
interval; starting a fresh one.

The number of established network connections has dropped from about 400 
down to about 100..  So it is still doing something, just not much..  
Does tor log anything when it is hibernating?  Or perhaps it is just tired?

regards,
Valient