diff --git a/pulsar-client/src/main/java/org/apache/pulsar/client/impl/conf/ClientConfigurationData.java b/pulsar-client/src/main/java/org/apache/pulsar/client/impl/conf/ClientConfigurationData.java
index bbe9999045a5b..59ed56eb7cf62 100644
--- a/pulsar-client/src/main/java/org/apache/pulsar/client/impl/conf/ClientConfigurationData.java
+++ b/pulsar-client/src/main/java/org/apache/pulsar/client/impl/conf/ClientConfigurationData.java
@@ -61,6 +61,8 @@
 public class ClientConfigurationData implements Serializable, Cloneable {
     private static final long serialVersionUID = 1L;
 
+    public static final long DEFAULT_MEMORY_LIMIT_BYTES = 64 * 1024 * 1024;
+
     @Schema(
             name = "serviceUrl",
             requiredMode = Schema.RequiredMode.REQUIRED,
@@ -433,7 +435,7 @@ public class ClientConfigurationData implements Serializable, Cloneable {
             description = "Limit of client memory usage (in byte). The 64M default can guarantee a high producer "
                     + "throughput."
     )
-    private long memoryLimitBytes = 64 * 1024 * 1024;
+    private long memoryLimitBytes = DEFAULT_MEMORY_LIMIT_BYTES;
 
     @Schema(
             name = "proxyServiceUrl",
diff --git a/pulsar-testclient/src/main/java/org/apache/pulsar/testclient/PerformanceBaseArguments.java b/pulsar-testclient/src/main/java/org/apache/pulsar/testclient/PerformanceBaseArguments.java
index 3c4b831332281..3e5e0c90f0015 100644
--- a/pulsar-testclient/src/main/java/org/apache/pulsar/testclient/PerformanceBaseArguments.java
+++ b/pulsar-testclient/src/main/java/org/apache/pulsar/testclient/PerformanceBaseArguments.java
@@ -19,6 +19,7 @@
 package org.apache.pulsar.testclient;
 
 import static org.apache.commons.lang3.StringUtils.isBlank;
+import static org.apache.pulsar.client.impl.conf.ClientConfigurationData.DEFAULT_MEMORY_LIMIT_BYTES;
 import org.apache.pulsar.cli.converters.picocli.ByteUnitToLongConverter;
 import org.apache.pulsar.client.api.ProxyProtocol;
 import picocli.CommandLine.Option;
@@ -98,8 +99,9 @@ public abstract class PerformanceBaseArguments extends CmdBase{
     public String deprecatedAuthPluginClassName;
 
     @Option(names = { "-ml", "--memory-limit", }, description = "Configure the Pulsar client memory limit "
-            + "(eg: 32M, 64M)", converter = ByteUnitToLongConverter.class)
-    public long memoryLimit;
+            + "(eg: 32M, 64M). Use 0 to disable the limit. Default: 64M",
+            converter = ByteUnitToLongConverter.class)
+    public long memoryLimit = DEFAULT_MEMORY_LIMIT_BYTES;
     public PerformanceBaseArguments(String cmdName) {
         super(cmdName);
     }
diff --git a/pulsar-testclient/src/test/java/org/apache/pulsar/testclient/PerformanceBaseArgumentsTest.java b/pulsar-testclient/src/test/java/org/apache/pulsar/testclient/PerformanceBaseArgumentsTest.java
index 78cee5c22154b..3fe0b62fb5658 100644
--- a/pulsar-testclient/src/test/java/org/apache/pulsar/testclient/PerformanceBaseArgumentsTest.java
+++ b/pulsar-testclient/src/test/java/org/apache/pulsar/testclient/PerformanceBaseArgumentsTest.java
@@ -19,6 +19,7 @@
 package org.apache.pulsar.testclient;
 
 import static org.apache.pulsar.client.api.ProxyProtocol.SNI;
+import static org.apache.pulsar.client.impl.conf.ClientConfigurationData.DEFAULT_MEMORY_LIMIT_BYTES;
 import static org.testng.Assert.assertEquals;
 import static org.testng.Assert.fail;
 import java.io.File;
@@ -249,6 +250,38 @@ public void run() throws Exception {
             // Act
             baseArgument.parseCLI();
 
+            // Assert
+            assertEquals(baseArgument.memoryLimit, DEFAULT_MEMORY_LIMIT_BYTES);
+        }
+    }
+
+    @Test
+    public void testMemoryLimitCanBeDisabled() throws Exception {
+        for (String cmd : List.of(
+                "pulsar-perf read",
+                "pulsar-perf produce",
+                "pulsar-perf consume",
+                "pulsar-perf transaction"
+        )) {
+            // Arrange
+            final PerformanceBaseArguments baseArgument = new PerformanceBaseArguments("") {
+                @Override
+                public void run() throws Exception {
+
+                }
+
+            };
+            String confFile = "./src/test/resources/perf_client1.conf";
+            Properties prop = new Properties(System.getProperties());
+            try (FileInputStream fis = new FileInputStream(confFile)) {
+                prop.load(fis);
+            }
+            baseArgument.getCommander().setDefaultValueProvider(PulsarPerfTestPropertiesProvider.create(prop));
+            baseArgument.parse(new String[]{"-ml", "0"});
+
+            // Act
+            baseArgument.parseCLI();
+
             // Assert
             assertEquals(baseArgument.memoryLimit, 0L);
         }