diff --git a/fragment.go b/fragment.go
index 149749230..d24c856d2 100644
--- a/fragment.go
+++ b/fragment.go
@@ -691,7 +691,6 @@ func (f *fragment) unprotectedSetRow(row *Row, rowID uint64) (changed bool, err
 
 	// Snapshot storage.
 	f.snapshotQueue.Enqueue(f)
-	f.stats.Count(MetricSetRow, 1, 1.0)
 
 	return changed, nil
 }
@@ -733,8 +732,6 @@ func (f *fragment) unprotectedClearRow(rowID uint64) (changed bool, err error) {
 	// Snapshot storage.
 	f.snapshotQueue.Enqueue(f)
 
-	f.stats.Count(MetricClearRow, 1, 1.0)
-
 	return changed, nil
 }
 
diff --git a/metrics.go b/metrics.go
index a8afa8e41..0e3ce1208 100644
--- a/metrics.go
+++ b/metrics.go
@@ -28,11 +28,9 @@ const (
 	MetricRowBSI                     = "query_row_bsi_total"
 	MetricSetRowAttrs                = "query_setrowattrs_total"
 	MetricSetColumnAttrs             = "query_setcolumnattrs_total"
-	MetricMaximumRow                 = "maximum_row"
+	MetricMaximumRow                 = "shard_maximum_row"
 	MetricSetBit                     = "set_bit_total"
 	MetricClearBit                   = "clear_bit_total"
-	MetricSetRow                     = "set_row_total"
-	MetricClearRow                   = "clear_row_total"
 	MetricImportingN                 = "importing_total"
 	MetricImportedN                  = "imported_total"
 	MetricClearingN                  = "clearing_total"
diff --git a/prometheus/prometheus.go b/prometheus/prometheus.go
index 4567d0f11..551996fb9 100644
--- a/prometheus/prometheus.go
+++ b/prometheus/prometheus.go
@@ -252,8 +252,7 @@ func (c *prometheusClient) Set(name string, value string, rate float64) {
 
 // Timing tracks timing information for a metric.
 func (c *prometheusClient) Timing(name string, value time.Duration, rate float64) {
-	durationS := float64(value) / float64(time.Second)
-	c.Histogram(name, float64(durationS), rate)
+	c.Histogram(name, value.Seconds(), rate)
 }
 
 // SetLogger sets the logger for client.