Web Service Performance Metrics

• Server Side: can be gathered by stress testing on the server end.
Important parameters are:
– Server throughput (measured as the number of requests per second)
– Latency (time taken between the service request arriving and the request being serviced.)

• Client Side: client side monitoring or distributed load testing can be used to gather data. Important parameters are:
– Latency (WS processing time + network latency). This is the time taken for a service call to return the earliest response bytes
– Throughput (the average byte flows per unit of time, including latency)
– Error rate (identifies the dependability of the service)