diff --git a/internal/cdc/replication/replicatestream/metrics.go b/internal/cdc/replication/replicatestream/metrics.go
index 922b336af6..b323f02c08 100644
--- a/internal/cdc/replication/replicatestream/metrics.go
+++ b/internal/cdc/replication/replicatestream/metrics.go
@@ -23,6 +23,7 @@ import (
 	"github.com/milvus-io/milvus/pkg/v2/proto/streamingpb"
 	"github.com/milvus-io/milvus/pkg/v2/streaming/util/message"
 	"github.com/milvus-io/milvus/pkg/v2/util/timerecord"
+	"github.com/milvus-io/milvus/pkg/v2/util/tsoutil"
 	"github.com/milvus-io/milvus/pkg/v2/util/typeutil"
 )
 
@@ -90,7 +91,7 @@ func (m *replicateMetrics) OnConfirmed(msg message.ImmutableMessage) {
 	metrics.CDCLastReplicatedTimeTick.WithLabelValues(
 		m.replicateInfo.GetSourceChannelName(),
 		m.replicateInfo.GetTargetChannelName(),
-	).Set(float64(msg.TimeTick()))
+	).Set(tsoutil.PhysicalTimeSeconds(msg.TimeTick()))
 }
 
 func (m *replicateMetrics) OnInitiate() {
diff --git a/pkg/metrics/cdc_metrics.go b/pkg/metrics/cdc_metrics.go
index c35d313623..aa671c3323 100644
--- a/pkg/metrics/cdc_metrics.go
+++ b/pkg/metrics/cdc_metrics.go
@@ -33,7 +33,7 @@ const (
 
 	// CDC metric labels
 	CDCLabelTargetCluster     = "target_cluster"
-	CDCLabelSourceChannelName = "source_channel_name"
+	CDCLabelSourceChannelName = WALChannelLabelName
 	CDCLabelTargetChannelName = "target_channel_name"
 	CDCLabelMsgType           = msgTypeLabelName
 	CDCLabelConnectionStatus  = "connection_status"
@@ -87,7 +87,7 @@ var CDCLastReplicatedTimeTick = prometheus.NewGaugeVec(
 		Namespace: milvusNamespace,
 		Subsystem: typeutil.CDCRole,
 		Name:      CDCMetricLastReplicatedTimeTick,
-		Help:      "The time tick of the last replicated message",
+		Help:      "The time tick in seconds of the last replicated message",
 	}, []string{
 		CDCLabelSourceChannelName,
 		CDCLabelTargetChannelName,