Chapter 23 WAN Optimization, Web Cache, Explicit Proxy, and WCCP : Peers and authentication groups : Monitoring WAN optimization peer performance
  
Monitoring WAN optimization peer performance
The WAN optimization peer monitor lists all of the WAN optimization peers that a FortiGate unit can perform WAN optimization with. These include peers manually added to the configuration as well as discovered peers.
The monitor lists each peer’s name, IP address, and peer type. The peer type indicates whether the peer was manually added or discovered. To show WAN optimization performance, for each peer the monitor lists the percent of traffic reduced by the peer in client-side WAN optimization configurations and in server-side configurations (also called gateway configurations).
To view the peer monitor, go to WAN Opt. & Cache > Monitor > Peer Monitor.