= Trac Logging =
[[TracGuideToc]]

Trac supports logging of system messages using the standard ''logging'' module part of Python 2.3 and newer.

'''Note:''' If you are using a Python version older than 2.3, the Trac logging mechanism will be silently disabled.

Logging is configured in the  directory from the Python 2.3 library into the Python 2.2 lib directory. Perhaps not the most elegant solution, but it works.


== Supported Logging Methods ==
 * '''none''' -- Suppress all log messages.
 * '''file''' -- Log messages to a file, specified with the ''log_file'' directive in [wiki:TracIni trac.ini]. 
 * '''stderr''' -- Output all log entries to console ([wiki:TracStandalone tracd] only).
 * '''syslog''' -- (UNIX) Send messages to local syslogd via named pipe '/dev/log'.
 * '''winlog''' -- (Windows) Use the system's NT eventlog for Trac logging.

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== Log Levels ==
The level of verbosity 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.

The levels are:
 * ''CRITICAL'' -- Log only the most critical, typically fatal, messages.
 * ''ERROR'' -- Request failures, bugs and errors. 
 * ''WARN'' -- Warnings, non-interrupting events.
 * ''INFO'' -- Diagnostic information, log information about all requests.
 * ''DEBUG'' -- Development messages, profiling, etc. Not fit for human consumption.

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See also: TracIni, TracGuide, TracEnvironment