Granular Logging

From apnsGuide

Log Files

The Web server ("Apache"), logs all page requests under /var/log/httpd/. By default, two logs exist, access_log and error_log.

access_log: this logfile contains all successful hits to your site. A hit is any type of page request, whether it's an image, HTML page, PHP script, anything accessible via a URL.

error_log: when something goes wrong, such as a 403 (forbidden) error or 550 (internal server error, referred to as an ISE informally), then it's logged here.

Urchin, the utility responsible for churning out comprehensive statistics of visitors to your Web site, uses the logfile access_log to generate its data. We limit Urchin profiles to one per account due to licensing restrictions; however though, you can use another utility, such as Webalizer or AWStats to generate visitor statistics.

Log files count towards your disk quota.