diff --git a/internal/metrics/metrics.go b/internal/metrics/metrics.go
index d3599d700c..e7d6cc800f 100644
--- a/internal/metrics/metrics.go
+++ b/internal/metrics/metrics.go
@@ -65,7 +65,7 @@ const (
 	collectionName           = "collection_name"
 	segmentStateLabelName    = "segment_state"
 	usernameLabelName        = "username"
-	rolenameLabelName        = "role_name"
+	roleNameLabelName        = "role_name"
 	cacheNameLabelName       = "cache_name"
 	cacheStateLabelName      = "cache_state"
 )
diff --git a/internal/metrics/rootcoord_metrics.go b/internal/metrics/rootcoord_metrics.go
index c8e6554068..aeae154329 100644
--- a/internal/metrics/rootcoord_metrics.go
+++ b/internal/metrics/rootcoord_metrics.go
@@ -142,6 +142,7 @@ var (
 			Name:      "time_tick_delay",
 			Help:      "The max time tick delay of flow graphs",
 		}, []string{
+			roleNameLabelName,
 			nodeIDLabelName,
 		})
 )
diff --git a/internal/rootcoord/quota_center.go b/internal/rootcoord/quota_center.go
index a4ea80f1a5..eb00ecec0e 100644
--- a/internal/rootcoord/quota_center.go
+++ b/internal/rootcoord/quota_center.go
@@ -428,7 +428,7 @@ func (q *QuotaCenter) getTimeTickDelayFactor(ts Timestamp) float64 {
 				vchannel = metric.Fgm.MinFlowGraphChannel
 				minTt = t2
 			}
-			metrics.RootCoordTtDelay.WithLabelValues(strconv.FormatInt(nodeID, 10)).Set(float64(curMaxDelay.Milliseconds()))
+			metrics.RootCoordTtDelay.WithLabelValues(typeutil.QueryNodeRole, strconv.FormatInt(nodeID, 10)).Set(float64(curMaxDelay.Milliseconds()))
 		}
 	}
 	for nodeID, metric := range q.dataNodeMetrics {
@@ -441,7 +441,7 @@ func (q *QuotaCenter) getTimeTickDelayFactor(ts Timestamp) float64 {
 				vchannel = metric.Fgm.MinFlowGraphChannel
 				minTt = t2
 			}
-			metrics.RootCoordTtDelay.WithLabelValues(strconv.FormatInt(nodeID, 10)).Set(float64(curMaxDelay.Milliseconds()))
+			metrics.RootCoordTtDelay.WithLabelValues(typeutil.DataNodeRole, strconv.FormatInt(nodeID, 10)).Set(float64(curMaxDelay.Milliseconds()))
 		}
 	}