Welcome MonkeyManChfKiller,

You may want to use your favorite search engine to search on MRTG which stands for 'Multi Router Traffic Grapher' which besides being written in Perl, also does a great job of graphing all sorts of continuously changing activity. It has been used for bandwidth, users, etc. and uses very little resources. I've used it for at least 15 years and it just keeps on working.

Regards...Ed