Especially for all counters was the "post_action" Directive which lets you specify what to run after the request completes. There you can connect the built-in pearl, Menkes, FastCGI anything for smart calculation. But if zaprashivat often hang special log on pictures in an easy to parse format and partite times in X minutes. It is from the point of load ideal. There is also a version with built-in variables, but he's too dreary