Log analysis in general is beyond the scope of this document, and not really part of the job of the web server itself.
For more information about this topic, and for applications which perform log analysis, check the Open Directory or Yahoo.
Various versions of Apache httpd have used other modules and directives to control access logging, including mod_log_referer, mod_log_agent, and the directive now subsumes the functionality of all the older directives.
This section describes how to configure the server to record information in the access log.The server reports the file-system path (as opposed to the web path) of the requested document.A very wide variety of different messages can appear in the error log. The error log will also contain debugging output from CGI scripts.The format is specified using a format string that looks much like a C-style printf(1) format string. For a complete list of the possible contents of the format string, see the mod_log_config documentation.A typical configuration for the access log might look as follows.