if err != nil || interval < time.Second {
		interval = defaultMetricsInterval
	}

	n, err := strconv.Atoi(r.Form.Get("n"))
	if err != nil || n <= 0 {
		n = math.MaxInt32
	}

	var types madmin.MetricType
	if t, _ := strconv.ParseUint(r.Form.Get("types"), 10, 64); t != 0 {
		types = madmin.MetricType(t)
	} else {
		types = madmin.MetricsAll
	}