We are having problems with performance on our server that host our websites that the processor gets upp to 90%. I would like to monitor the amount of users active on your sites that are published on the iis. My question, is this possible? is there any software for this?

EDIT current (like this second) visitor count on all the active websites on our iis

REASON FOR THIS
if i can get the visitor amount on the days the CPU is not overloaded and and compare it to the days it is then i atleast know that this CAN be a reason why this is happening and i can take it from there. Otherwise i can focus on the code on the sites, or maybe google crawler is causing this, there are manythings that can cause this you know? for me this is just a simple way of troubleshooting.