diff --git a/server/ingester/app_log/dbwriter/log.go b/server/ingester/app_log/dbwriter/log.go
index b0b2666e9d0..d5de1240fb4 100644
--- a/server/ingester/app_log/dbwriter/log.go
+++ b/server/ingester/app_log/dbwriter/log.go
@@ -305,8 +305,17 @@ func ReleaseApplicationLogStore(l *ApplicationLogStore) {
 	if l == nil || l.SubReferenceCount() {
 		return
 	}
+	for i := range l.AttributeNames {
+		l.AttributeNames[i] = ""
+	}
 	attributeNames := l.AttributeNames[:0]
+	for i := range l.AttributeValues {
+		l.AttributeValues[i] = ""
+	}
 	attributeValues := l.AttributeValues[:0]
+	for i := range l.MetricsNames {
+		l.MetricsNames[i] = ""
+	}
 	metricsNames := l.MetricsNames[:0]
 	metricsValues := l.MetricsValues[:0]
 	*l = ApplicationLogStore{}
diff --git a/server/ingester/event/dbwriter/event.go b/server/ingester/event/dbwriter/event.go
index d1c209177be..75ebe4ae00c 100644
--- a/server/ingester/event/dbwriter/event.go
+++ b/server/ingester/event/dbwriter/event.go
@@ -392,7 +392,13 @@ func ReleaseEventStore(e *EventStore) {
 	if e == nil || e.SubReferenceCount() {
 		return
 	}
+	for i := range e.AttributeNames {
+		e.AttributeNames[i] = ""
+	}
 	attributeNames := e.AttributeNames[:0]
+	for i := range e.AttributeValues {
+		e.AttributeValues[i] = ""
+	}
 	attributeValues := e.AttributeValues[:0]
 	*e = EventStore{}
 	e.AttributeNames = attributeNames
diff --git a/server/ingester/ext_metrics/dbwriter/ext_metrics.go b/server/ingester/ext_metrics/dbwriter/ext_metrics.go
index 8ba846125f2..490ed4ea268 100644
--- a/server/ingester/ext_metrics/dbwriter/ext_metrics.go
+++ b/server/ingester/ext_metrics/dbwriter/ext_metrics.go
@@ -255,8 +255,17 @@ var emptyUniversalTag = flow_metrics.UniversalTag{}
 
 func ReleaseExtMetrics(m *ExtMetrics) {
 	m.UniversalTag = emptyUniversalTag
+	for i := range m.TagNames {
+		m.TagNames[i] = ""
+	}
 	m.TagNames = m.TagNames[:0]
+	for i := range m.TagValues {
+		m.TagValues[i] = ""
+	}
 	m.TagValues = m.TagValues[:0]
+	for i := range m.MetricsFloatNames {
+		m.MetricsFloatNames[i] = ""
+	}
 	m.MetricsFloatNames = m.MetricsFloatNames[:0]
 	m.MetricsFloatValues = m.MetricsFloatValues[:0]
 	extMetricsPool.Put(m)
diff --git a/server/ingester/flow_log/log_data/l7_flow_log.go b/server/ingester/flow_log/log_data/l7_flow_log.go
index 8225f0e7b8f..c3ec337b0bd 100644
--- a/server/ingester/flow_log/log_data/l7_flow_log.go
+++ b/server/ingester/flow_log/log_data/l7_flow_log.go
@@ -629,7 +629,32 @@ func ReleaseL7FlowLog(l *L7FlowLog) {
 	if l.SubReferenceCount() {
 		return
 	}
+	ip60 := l.IP60[:0]
+	ip61 := l.IP61[:0]
+	encodedSpan := l.EncodedSpan[:0]
+	for i := range l.AttributeNames {
+		l.AttributeNames[i] = ""
+	}
+	attributeNames := l.AttributeNames[:0]
+	for i := range l.AttributeValues {
+		l.AttributeValues[i] = ""
+	}
+	attributeValues := l.AttributeValues[:0]
+	for i := range l.MetricsNames {
+		l.MetricsNames[i] = ""
+	}
+	metricsNames := l.MetricsNames[:0]
+	metricsValues := l.MetricsValues[:0]
+
 	*l = L7FlowLog{}
+	l.IP60 = ip60
+	l.IP61 = ip61
+	l.EncodedSpan = encodedSpan
+	l.AttributeNames = attributeNames
+	l.AttributeValues = attributeValues
+	l.MetricsNames = metricsNames
+	l.MetricsValues = metricsValues
+
 	poolL7FlowLog.Put(l)
 }