Using Variability as a Guiding Principle to Reduce Latency in Web Applications via OS Profiling

Request latency is a critical metric in determining the usability of web services. The latency of a request includes service time - the time when the request is being actively serviced - and waiting time - the time when the request is waiting to be served. Most existing works aim to reduce request latency by focusing on reducing the mean service time (that is, shortening the critical path).