1. A method for processing a service request received from a host, comprising: (a) relaying the service request from a service gateway to a server over a service session between the service gateway and the server; (b) determining by the service gateway a service request time for the service session; (c) receiving by the service gateway a service response from the server; (d) determining by the service gateway a service response time; (e) calculating by the service gateway a service processing time for the service request from the service request time and the service response time; (f) comparing the service processing time with an expected service processing time; and (g) updating a server busy indicator for the server in response to the comparing.