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