diff --git a/metrics/prometheus/collector.go b/metrics/prometheus/collector.go
index 3959cbf5e1..8187f4af02 100644
--- a/metrics/prometheus/collector.go
+++ b/metrics/prometheus/collector.go
@@ -30,6 +30,7 @@ var (
 	typeCounterTpl         = "# TYPE %s counter\n"
 	typeSummaryTpl         = "# TYPE %s summary\n"
 	keyValueTpl            = "%s %v\n\n"
+	keyCounterTpl          = "%s %v\n"
 	keyQuantileTagValueTpl = "%s {quantile=\"%s\"} %v\n"
 )
 
@@ -61,11 +62,16 @@ func (c *collector) addGaugeFloat64(name string, m metrics.GaugeFloat64) {
 func (c *collector) addHistogram(name string, m metrics.Histogram) {
 	pv := []float64{0.5, 0.75, 0.95, 0.99, 0.999, 0.9999}
 	ps := m.Percentiles(pv)
-	c.writeSummaryCounter(name, m.Count())
+
+	var sum float64 = 0
 	c.buff.WriteString(fmt.Sprintf(typeSummaryTpl, mutateKey(name)))
 	for i := range pv {
 		c.writeSummaryPercentile(name, strconv.FormatFloat(pv[i], 'f', -1, 64), ps[i])
+		sum += ps[i]
 	}
+
+	c.writeSummarySum(name, fmt.Sprintf("%f", sum))
+	c.writeSummaryCounter(name, len(ps))
 	c.buff.WriteRune('\n')
 }
 
@@ -76,7 +82,7 @@ func (c *collector) addMeter(name string, m metrics.Meter) {
 func (c *collector) addTimer(name string, m metrics.Timer) {
 	pv := []float64{0.5, 0.75, 0.95, 0.99, 0.999, 0.9999}
 	ps := m.Percentiles(pv)
-	c.writeSummaryCounter(name, m.Count())
+	c.writeCounter(name, m.Count())
 	c.buff.WriteString(fmt.Sprintf(typeSummaryTpl, mutateKey(name)))
 	for i := range pv {
 		c.writeSummaryPercentile(name, strconv.FormatFloat(pv[i], 'f', -1, 64), ps[i])
@@ -90,11 +96,19 @@ func (c *collector) addResettingTimer(name string, m metrics.ResettingTimer) {
 	}
 	ps := m.Percentiles([]float64{50, 95, 99})
 	val := m.Values()
-	c.writeSummaryCounter(name, len(val))
 	c.buff.WriteString(fmt.Sprintf(typeSummaryTpl, mutateKey(name)))
 	c.writeSummaryPercentile(name, "0.50", ps[0])
 	c.writeSummaryPercentile(name, "0.95", ps[1])
 	c.writeSummaryPercentile(name, "0.99", ps[2])
+
+	var sum int64 = 0
+
+	for _, v := range val {
+		sum += v
+	}
+
+	c.writeSummarySum(name, fmt.Sprintf("%d", sum))
+	c.writeSummaryCounter(name, len(val))
 	c.buff.WriteRune('\n')
 }
 
@@ -104,17 +118,27 @@ func (c *collector) writeGaugeCounter(name string, value interface{}) {
 	c.buff.WriteString(fmt.Sprintf(keyValueTpl, name, value))
 }
 
-func (c *collector) writeSummaryCounter(name string, value interface{}) {
+func (c *collector) writeCounter(name string, value interface{}) {
 	name = mutateKey(name + "_count")
 	c.buff.WriteString(fmt.Sprintf(typeCounterTpl, name))
 	c.buff.WriteString(fmt.Sprintf(keyValueTpl, name, value))
 }
 
+func (c *collector) writeSummaryCounter(name string, value interface{}) {
+	name = mutateKey(name + "_count")
+	c.buff.WriteString(fmt.Sprintf(keyCounterTpl, name, value))
+}
+
 func (c *collector) writeSummaryPercentile(name, p string, value interface{}) {
 	name = mutateKey(name)
 	c.buff.WriteString(fmt.Sprintf(keyQuantileTagValueTpl, name, p, value))
 }
 
+func (c *collector) writeSummarySum(name string, value string) {
+	name = mutateKey(name + "_sum")
+	c.buff.WriteString(fmt.Sprintf(keyCounterTpl, name, value))
+}
+
 func mutateKey(key string) string {
 	return strings.Replace(key, "/", "_", -1)
 }
diff --git a/metrics/prometheus/collector_test.go b/metrics/prometheus/collector_test.go
index 43f2f804d3..b1cc2aaf89 100644
--- a/metrics/prometheus/collector_test.go
+++ b/metrics/prometheus/collector_test.go
@@ -67,9 +67,6 @@ test_gauge 23456
 # TYPE test_gauge_float64 gauge
 test_gauge_float64 34567.89
 
-# TYPE test_histogram_count counter
-test_histogram_count 0
-
 # TYPE test_histogram summary
 test_histogram {quantile="0.5"} 0
 test_histogram {quantile="0.75"} 0
@@ -77,6 +74,8 @@ test_histogram {quantile="0.95"} 0
 test_histogram {quantile="0.99"} 0
 test_histogram {quantile="0.999"} 0
 test_histogram {quantile="0.9999"} 0
+test_histogram_sum 0.000000
+test_histogram_count 6
 
 # TYPE test_meter gauge
 test_meter 9999999
@@ -92,15 +91,17 @@ test_timer {quantile="0.99"} 1.2e+08
 test_timer {quantile="0.999"} 1.2e+08
 test_timer {quantile="0.9999"} 1.2e+08
 
-# TYPE test_resetting_timer_count counter
-test_resetting_timer_count 6
-
 # TYPE test_resetting_timer summary
 test_resetting_timer {quantile="0.50"} 12000000
 test_resetting_timer {quantile="0.95"} 120000000
 test_resetting_timer {quantile="0.99"} 120000000
+test_resetting_timer_sum 180000000
+test_resetting_timer_count 6
 
 `
+
+	c.addResettingTimer("test/empty_resetting_timer", emptyResettingTimer)
+
 	exp := c.buff.String()
 	if exp != expectedOutput {
 		t.Log("Expected Output:\n", expectedOutput)