diff --git a/charts/kubezero-istio-ingress/values.yaml b/charts/kubezero-istio-ingress/values.yaml
index 2474b48..79ef891 100644
--- a/charts/kubezero-istio-ingress/values.yaml
+++ b/charts/kubezero-istio-ingress/values.yaml
@@ -23,10 +23,11 @@ istio-ingress:
       replicaCount: 1
       resources:
         requests:
+          cpu: 50m
           memory: 64Mi
         limits:
           # cpu: 100m
-          memory: 256Mi
+          memory: 512Mi
       externalTrafficPolicy: Local
       podAntiAffinityLabelSelector:
       - key: app
diff --git a/charts/kubezero/templates/istio-ingress.yaml b/charts/kubezero/templates/istio-ingress.yaml
index 39fa737..4e8d5c8 100644
--- a/charts/kubezero/templates/istio-ingress.yaml
+++ b/charts/kubezero/templates/istio-ingress.yaml
@@ -1,4 +1,10 @@
 {{- define "istio-ingress-values" }}
+
+{{- with index .Values "istio-ingress" "global" }}
+global:
+  {{- toYaml . | nindent 2 }}
+{{- end }}
+
 {{- if index .Values "istio-ingress" "public" }}
 istio-ingress:
   enabled: {{ index .Values "istio-ingress" "public" "enabled" }}
diff --git a/charts/kubezero/templates/istio.yaml b/charts/kubezero/templates/istio.yaml
index eae91c7..ac750b8 100644
--- a/charts/kubezero/templates/istio.yaml
+++ b/charts/kubezero/templates/istio.yaml
@@ -1,7 +1,15 @@
 {{- define "istio-values" }}
+
+{{- if .Values.HighAvailableControlplane }}
+global:
+  defaultPodDisruptionBudget:
+    enabled: true
+
 istio-discovery:
   pilot:
-    replicaCount: {{ ternary 2 1 .Values.HighAvailableControlplane }}
+    replicaCount: 2
+{{- end }}
+
 {{- end }}