graph of CCU and tracking services

[phulerock]

I attempted to obtain the CCU (concurrent users) graph of Linux / Windows However, the default Cacti only allows graphing of bitperseconds template. So how can I obtain the templates which permits graphing of CCU on Linux/ Windows and http, mysql tracking.

about services tracking, I want to check http / mysql / ftp etc. like a Nagios. If overload, the red signal will appear. Is Cacti have this ?

And do I need to use 64bit counters for gigabit networks ? My company have a thirty or more gigabit bandwidth.