You can monitor the performance of Advanced Authentication servers by performing the following:
When you are in the configuration console, press ALT+F9 to get access to CPU/Memory usage data.
If you want to see stats ordered by memory usage:
Press F6 to open Sort by options.
Press the down arrow to switch to MEM%.
Press Enter to save.
Press ALT+F12 to get information about active connections and IOSTAT.
For more information, see Determining the Number of Web Servers for Load Balancing.