I was trying to figure out how to turn on ACE debugging the other day. I didn't have my ACE Programmer's Guide with me and I wasn't finding it via Google. All the examples I found talked about how to change code to enable ACE debug statements, but I knew that it could be done through configuration. Turns out you need the following in your svc.conf file:
dynamic Logger Service_Object* ACE:_make_ACE_Logging_Strategy() "-s log.txt -f STDOUT|STDERR|OSTREAM|VERBOSE -p DEBUG"
This is discussed in section 3.8 (page 73) of ACE Programmer Guide and at this link: Logging Strategy Service