How can I roll over my logfiles automatically at midnight?

Long-running applications tend to produce ever-increasing logfiles. For backup and cleanup purposes, however, it is often desirable to move the current logfile to a different location from time to time and start writing a new one. This is a non-trivial task, because it has to happen in sync with the logging system in order not to lose any messages in the process.

Luckily, Mark Pfeiffer's "Log::Dispatch::FileRotate" appender works well with Log::Log4perl to rotate your logfiles in a variety of ways. Note, however, that having the application deal with rotating a log file is not cheap. Among other things, it requires locking the log file with every write to avoid race conditions.

There are good reasons to use external rotators like "newsyslog" instead. See the entry "How can I rotate a logfile with newsyslog?" in the FAQ for more information on how to configure it. When using "Log::Dispatch::FileRotate", all you have to do is specify it in your Log::Log4perl configuration file and your ... more.

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