Consider you have 3 servers in the server farm for the Load Balancer: 

APP1, APP2, APP3. 


All 3 servers are all currently running around 10% CPU usage.


Set the Load Balancing CPU option to 60%.

The Load Balancer will distribute fairly all users until one of the servers reaches 60% CPU load.

- If APP1 climbs over 60% CPU load, then all new users will be fairly distributed on servers APP2 and APP3, as their CPU usage is still under 60%.


- If APP1 CPU load falls under 60%, then APP1 will be available again for new users, in the list of servers for the Load Balancing.


- If APP3 climbs over 60% CPU load, then APP3 won't be available anymore, in the list of servers for the Load Balancing.