|   | 1 | = Trac Logging =  | 
                  
                          |   | 2 | [[TracGuideToc]]  | 
                  
                          |   | 3 |   | 
                  
                          |   | 4 | Trac supports logging of system messages using the standard [http://docs.python.org/lib/module-logging.html logging module] that comes with Python.  | 
                  
                          |   | 5 |   | 
                  
                          |   | 6 | Logging is configured in the {{{[logging]}}} section in [wiki:TracIni trac.ini].  | 
                  
                          |   | 7 |   | 
                  
                          |   | 8 | == Supported Logging Methods ==  | 
                  
                          |   | 9 |   | 
                  
                          |   | 10 | The log method is set using the `log_type` configuration option, which takes any of the following values:  | 
                  
                          |   | 11 |  '''none'':: Suppress all log messages.  | 
                  
                          |   | 12 |  '''file''':: Log messages to a file, specified with the `log_file` option in [wiki:TracIni trac.ini].   | 
                  
                          |   | 13 |  '''stderr''':: Output all log entries to console ([wiki:TracStandalone tracd] only).  | 
                  
                          |   | 14 |  '''syslog''':: (UNIX) Send messages to local syslogd via named pipe `/dev/log`.  | 
                  
                          |   | 15 |  '''eventlog''':: (Windows) Use the system's NT eventlog for Trac logging.  | 
                  
                          |   | 16 |   | 
                  
                          |   | 17 | == Log Levels ==  | 
                  
                          |   | 18 |   | 
                  
                          |   | 19 | The verbosity level of logged messages can be set using the ''log_level'' directive in [wiki:TracIni trac.ini]. The log level defines the minimum level of urgency required for a message to be logged.  | 
                  
                          |   | 20 |   | 
                  
                          |   | 21 | The levels are:  | 
                  
                          |   | 22 |  '''CRITICAL''':: Log only the most critical (typically fatal) errors.  | 
                  
                          |   | 23 |  '''ERROR''':: Log failures, bugs and errors.   | 
                  
                          |   | 24 |  '''WARN''':: Log warnings, non-interrupting events.  | 
                  
                          |   | 25 |  '''INFO''':: Diagnostic information, log information about all processing.  | 
                  
                          |   | 26 |  '''DEBUG''':: Trace messages, profiling, etc.  | 
                  
                          |   | 27 |   | 
                  
                          |   | 28 | ----  | 
                  
                          |   | 29 | See also: TracIni, TracGuide, TracEnvironment  |