@Monitor(name = "OverallResponseTimeMillisAvg", type = DataSourceType.INFORMATIONAL,
             description = "Average total time for a request, in milliseconds")
    public double getResponseTimeAvg() {
        return responseTimeDist.getMean();
    }
Gets the average total amount of time to handle a request, in milliseconds.
ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer/ServerStats.java