diff --git a/tests/_helm/values/e2e/distributed-pulsar b/tests/_helm/values/e2e/distributed-pulsar
index 4bab346958..ece9f07a9e 100644
--- a/tests/_helm/values/e2e/distributed-pulsar
+++ b/tests/_helm/values/e2e/distributed-pulsar
@@ -146,6 +146,11 @@ pulsarv3:
       limits:
         cpu: "0.5"
         memory: 2Gi
+    configData:
+      PULSAR_MEM: >
+        -Xms512m
+        -Xmx512m
+        -XX:MaxDirectMemorySize=1024m
     tolerations:
     - effect: NoSchedule
       key: node-role.kubernetes.io/e2e
diff --git a/tests/_helm/values/nightly/distributed-pulsar-mmap b/tests/_helm/values/nightly/distributed-pulsar-mmap
index cc798535c4..2f39a15589 100644
--- a/tests/_helm/values/nightly/distributed-pulsar-mmap
+++ b/tests/_helm/values/nightly/distributed-pulsar-mmap
@@ -132,6 +132,11 @@ pulsarv3:
       limits:
         cpu: "0.5"
         memory: 2Gi
+    configData:
+      PULSAR_MEM: >
+        -Xms512m
+        -Xmx512m
+        -XX:MaxDirectMemorySize=1024m
     tolerations:
     - effect: NoSchedule
       key: node-role.kubernetes.io/e2e