@Monitor(name = "ResponseTimePercentileNumValues", type = DataSourceType.GAUGE,
             description = "The number of data points used to compute the currently reported percentile values")
    public int getResponseTimePercentileNumValues() {
        return dataDist.getSampleSize();
    }
Gets the number of samples used to compute the various response-time percentiles.
ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer/ServerStats.java