ApacheCon NA 2010 Session
Apache HTTP Server Logging
When troubleshooting Apache HTTP Server problems, the first place you should look is the error log. Unfortunately, many folks are unaware that there is an error log, or where it's located. But beyond that, there are numerous other ways to get httpd to log all sorts of things, from what your rewrite rules are doing to whether a particular request finished in a reasonable amount of time. I'll show you all of the available logging and debug modules, and we'll also look at a few third-party modules and what additional information they can provide.