diff --git a/example/src/main/java/com/alibaba/nacos/example/NamingExample.java b/example/src/main/java/com/alibaba/nacos/example/NamingExample.java
index db5d885a6..ef58a968c 100644
--- a/example/src/main/java/com/alibaba/nacos/example/NamingExample.java
+++ b/example/src/main/java/com/alibaba/nacos/example/NamingExample.java
@@ -55,25 +55,23 @@ public class NamingExample {
         NamingService naming = NamingFactory.createNamingService(properties);
         
         naming.registerInstance(INSTANCE_SERVICE_NAME, INSTANCE_IP, INSTANCE_PORT, INSTANCE_CLUSTER_NAME);
-        
-        System.out.println("[instances after register] " + naming.getAllInstances(INSTANCE_SERVICE_NAME));
-        
+    
         Executor executor = new ThreadPoolExecutor(1, 1, 0L, TimeUnit.MILLISECONDS, new LinkedBlockingQueue<Runnable>(),
                 runnable -> {
                     Thread thread = new Thread(runnable);
                     thread.setName("test-thread");
                     return thread;
                 });
-        
+    
         naming.subscribe(INSTANCE_SERVICE_NAME, new AbstractEventListener() {
-            
+        
             //EventListener onEvent is sync to handle, If process too low in onEvent, maybe block other onEvent callback.
             //So you can override getExecutor() to async handle event.
             @Override
             public Executor getExecutor() {
                 return executor;
             }
-            
+        
             @Override
             public void onEvent(Event event) {
                 System.out.println("[serviceName] " + ((NamingEvent) event).getServiceName());
@@ -81,8 +79,14 @@ public class NamingExample {
             }
         });
         
-        naming.deregisterInstance(INSTANCE_SERVICE_NAME, INSTANCE_IP, INSTANCE_PORT, INSTANCE_CLUSTER_NAME);
+        Thread.sleep(1000);
+    
+        System.out.println("[instances after register] " + naming.getAllInstances(INSTANCE_SERVICE_NAME));
         
+        Thread.sleep(1000);
+    
+        naming.deregisterInstance(INSTANCE_SERVICE_NAME, INSTANCE_IP, INSTANCE_PORT, INSTANCE_CLUSTER_NAME);
+    
         Thread.sleep(1000);
         
         System.out.println("[instances after deregister] " + naming.getAllInstances(INSTANCE_SERVICE_NAME));
diff --git a/example/src/main/resources/logback.xml b/example/src/main/resources/logback.xml
new file mode 100644
index 000000000..ddf83b60b
--- /dev/null
+++ b/example/src/main/resources/logback.xml
@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+  ~ Copyright 1999-2023 Alibaba Group Holding Ltd.
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender"/>
+    
+    <appender name="PREF_LOG_FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
+        <file>/Users/xiweng.yy/logs/nacos/perf.log</file>
+        
+        <rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
+            <fileNamePattern>/Users/xiweng.yy/logs/nacos/perf.log.%i</fileNamePattern>
+            <maxIndex>${JM.LOG.RETAIN.COUNT:-7}</maxIndex>
+        </rollingPolicy>
+        
+        <triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
+            <maxFileSize>${JM.LOG.FILE.SIZE:-10MB}</maxFileSize>
+        </triggeringPolicy>
+        
+        <encoder>
+            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %p [%-5t:%c{2}] %m%n</pattern>
+        </encoder>
+    </appender>
+    
+    <logger name="org.apache" level="DEBUG" />
+    <logger name="org.apache.http.wire" level="DEBUG" />
+    <logger name="org.apache.http.headers" level="INFO" />
+    <logger name="io.grpc.netty" level="INFO">
+        <appender-ref ref="STDOUT"/>
+    </logger>
+    <logger name="komachi.sion.nacos" level="INFO">
+        <appender-ref ref="PREF_LOG_FILE"/>
+    </logger>
+    
+    <root level="INFO">
+        <appender-ref ref="STDOUT"/>
+    </root>
+</configuration>