diff --git a/cdc/processor/pipeline/sorter.go b/cdc/processor/pipeline/sorter.go
index 3032c41fcaa..0368d27a758 100644
--- a/cdc/processor/pipeline/sorter.go
+++ b/cdc/processor/pipeline/sorter.go
@@ -140,14 +140,6 @@ func (n *sorterNode) StartActorNode(ctx pipeline.NodeContext, isTableActorMode b
 		ctx.Throw(errors.Trace(eventSorter.Run(stdCtx)))
 		return nil
 	})
-	n.eg.Go(func() error {
-		// Since the flowController is implemented by `Cond`, it is not cancelable
-		// by a context. We need to listen on cancellation and aborts the flowController
-		// manually.
-		<-stdCtx.Done()
-		n.flowController.Abort()
-		return nil
-	})
 	n.eg.Go(func() error {
 		lastSentResolvedTs := uint64(0)
 		lastSendResolvedTsTime := time.Now() // the time at which we last sent a resolved-ts.
@@ -314,6 +306,10 @@ func (n *sorterNode) Destroy(ctx pipeline.NodeContext) error {
 			log.Warn("schedule table cleanup task failed", zap.Error(err))
 		}
 	}
+	// Since the flowController is implemented by `Cond`, it is not cancelable by a context
+	// the flowController will be blocked in a background goroutine,
+	// We need to abort the flowController manually in the nodeRunner
+	n.flowController.Abort()
 	return n.eg.Wait()
 }
 
diff --git a/cdc/processor/processor.go b/cdc/processor/processor.go
index e4f9251acd3..b66f7831089 100644
--- a/cdc/processor/processor.go
+++ b/cdc/processor/processor.go
@@ -363,6 +363,7 @@ func (p *processor) tick(ctx cdcContext.Context, state *orchestrator.ChangefeedR
 		p.handleWorkload()
 	}
 	p.doGCSchemaStorage(ctx)
+	p.metricSyncTableNumGauge.Set(float64(len(p.tables)))
 
 	if p.newSchedulerEnabled {
 		if err := p.agent.Tick(ctx); err != nil {
@@ -974,17 +975,6 @@ func (p *processor) createTablePipelineImpl(ctx cdcContext.Context, tableID mode
 		sink,
 		p.changefeed.Info.GetTargetTs(),
 	)
-	p.wg.Add(1)
-	p.metricSyncTableNumGauge.Inc()
-	go func() {
-		table.Wait()
-		p.wg.Done()
-		p.metricSyncTableNumGauge.Dec()
-		log.Debug("Table pipeline exited", zap.Int64("tableID", tableID),
-			cdcContext.ZapFieldChangefeed(ctx),
-			zap.String("name", table.Name()),
-			zap.Any("replicaInfo", replicaInfo))
-	}()
 
 	if p.redoManager.Enabled() {
 		p.redoManager.AddTable(tableID, replicaInfo.StartTs)
diff --git a/cdc/puller/puller.go b/cdc/puller/puller.go
index a04831a0eba..ed698dec057 100644
--- a/cdc/puller/puller.go
+++ b/cdc/puller/puller.go
@@ -139,21 +139,11 @@ func (p *pullerImpl) Run(ctx context.Context) error {
 		txnCollectCounter.DeleteLabelValues(captureAddr, changefeedID, "kv")
 		txnCollectCounter.DeleteLabelValues(captureAddr, changefeedID, "resolved")
 	}()
-	g.Go(func() error {
-		for {
-			select {
-			case <-ctx.Done():
-				return nil
-			case <-time.After(15 * time.Second):
-				metricEventChanSize.Observe(float64(len(eventCh)))
-				metricOutputChanSize.Observe(float64(len(p.outputCh)))
-				metricPullerResolvedTs.Set(float64(oracle.ExtractPhysical(atomic.LoadUint64(&p.resolvedTs))))
-			}
-		}
-	})
 
 	lastResolvedTs := p.checkpointTs
 	g.Go(func() error {
+		metricsTicker := time.NewTicker(15 * time.Second)
+		defer metricsTicker.Stop()
 		output := func(raw *model.RawKVEntry) error {
 			// even after https://github.com/pingcap/tiflow/pull/2038, kv client
 			// could still miss region change notification, which leads to resolved
@@ -181,6 +171,11 @@ func (p *pullerImpl) Run(ctx context.Context) error {
 		for {
 			var e model.RegionFeedEvent
 			select {
+			case <-metricsTicker.C:
+				metricEventChanSize.Observe(float64(len(eventCh)))
+				metricOutputChanSize.Observe(float64(len(p.outputCh)))
+				metricPullerResolvedTs.Set(float64(oracle.ExtractPhysical(atomic.LoadUint64(&p.resolvedTs))))
+				continue
 			case e = <-eventCh:
 			case <-ctx.Done():
 				return errors.Trace(ctx.Err())
diff --git a/cdc/sorter/unified/unified_sorter.go b/cdc/sorter/unified/unified_sorter.go
index e8c1770a8f9..42a0394e0ec 100644
--- a/cdc/sorter/unified/unified_sorter.go
+++ b/cdc/sorter/unified/unified_sorter.go
@@ -114,7 +114,7 @@ func (s *Sorter) Run(ctx context.Context) error {
 
 	defer close(s.closeCh)
 
-	finish := util.MonitorCancelLatency(ctx, "Unified Sorter")
+	finish, startCancel := util.MonitorCancelLatency(ctx, "Unified Sorter")
 	defer finish()
 
 	ctx = context.WithValue(ctx, ctxKey{}, s)
@@ -163,6 +163,7 @@ func (s *Sorter) Run(ctx context.Context) error {
 
 		select {
 		case <-subctx.Done():
+			startCancel()
 			return errors.Trace(subctx.Err())
 		case err := <-heapSorterErrCh:
 			return errors.Trace(err)
diff --git a/pkg/util/cancel_monitor.go b/pkg/util/cancel_monitor.go
index fb4953bc9cb..3e22ce4d288 100644
--- a/pkg/util/cancel_monitor.go
+++ b/pkg/util/cancel_monitor.go
@@ -21,12 +21,14 @@ import (
 	"go.uber.org/zap"
 )
 
-// MonitorCancelLatency monitors the latency from ctx being cancelled and the returned function being called
-func MonitorCancelLatency(ctx context.Context, identifier string) func() {
+// MonitorCancelLatency monitors the latency from ctx being cancelled
+// the first returned function should be called when the cancellation is done
+// the second returned function should be called to mark the cancellation is started, it will start a
+// background go routine to monitor the latency util finish is called or cancellation is done
+func MonitorCancelLatency(ctx context.Context, identifier string) (func(), func()) {
 	finishedCh := make(chan struct{})
-	go func() {
-		select {
-		case <-ctx.Done():
+	start := func() {
+		go func() {
 			log.Debug("MonitorCancelLatency: Cancelled", zap.String("identifier", identifier))
 			ticker := time.NewTicker(time.Second)
 			defer ticker.Stop()
@@ -43,10 +45,9 @@ func MonitorCancelLatency(ctx context.Context, identifier string) func() {
 						zap.Int("duration", elapsed), zap.Error(ctx.Err()))
 				}
 			}
-		case <-finishedCh:
-		}
-	}()
+		}()
+	}
 	return func() {
 		close(finishedCh)
-	}
+	}, start
 }