STATS w

Usage: STATS w [<server>]

Operator Statistics:
Shows the average number of network operators and users on that server and on the network for various recent time intervals. This is a good way to keep track of how your network is doing and look for problems. You can check your oper to user ratio and make sure that it is sufficient for the times your chat network is open.

Example:
/stats w webmaster.*
/stats w