diff --git a/samples/skywalking-auth/src/main/resources/sky-walking.auth b/samples/skywalking-auth/src/main/resources/sky-walking.auth
index 7b5b06f49..3d5ed75a6 100644
--- a/samples/skywalking-auth/src/main/resources/sky-walking.auth
+++ b/samples/skywalking-auth/src/main/resources/sky-walking.auth
@@ -4,7 +4,7 @@ skywalking.user_id=123
 #是否打印数据
 buriedpoint.printf=false
 #发送的最大长度
-sender.max_sender_length=1280
+sender.max_sender_length=8000
 #服务端的读取步长
 sender.read_step_length=256
 #最大消费线程数
@@ -17,8 +17,6 @@ consumer.consumer_fail_retry_wait_interval=50
 buffer.buffer_max_size=18000
 #Buffer池的最大长度
 buffer.pool_size=5
-#发送的最大条数
-sender.max_buffer_data_size=1
 #最大发送者的连接数阀比例
 sender.connect_percent=100
 #当没有Sender时,尝试获取sender的等待周期
@@ -30,4 +28,7 @@ sender.servers_addr=127.0.0.1:34000
 
 buriedpoint.max_exception_stack_length=4000
 #发送检查线程检查周期
-senderchecker.check_polling_time=200
\ No newline at end of file
+senderchecker.check_polling_time=200
+
+#业务字段的最大长度
+businesskey.max_length=300
\ No newline at end of file
diff --git a/skywalking-api/src/main/java/com/ai/cloud/skywalking/buffer/BufferGroup.java b/skywalking-api/src/main/java/com/ai/cloud/skywalking/buffer/BufferGroup.java
index 94a4162e9..6a8c55a1e 100644
--- a/skywalking-api/src/main/java/com/ai/cloud/skywalking/buffer/BufferGroup.java
+++ b/skywalking-api/src/main/java/com/ai/cloud/skywalking/buffer/BufferGroup.java
@@ -62,7 +62,6 @@ public class BufferGroup {
 
         @Override
         public void run() {
-            int index = 0;
             StringBuilder data = new StringBuilder();
             while (true) {
                 boolean bool = false;
@@ -79,7 +78,6 @@ public class BufferGroup {
                                 logger.log(Level.ALL, "Sleep Failure");
                             }
                         }
-                        index = 0;
                         data = new StringBuilder();
                     }
 
@@ -95,7 +93,6 @@ public class BufferGroup {
                             logger.log(Level.ALL, "Sleep Failure");
                         }
                     }
-                    index = 0;
                     data = new StringBuilder();
                 }
 
diff --git a/skywalking-api/src/main/java/com/ai/cloud/skywalking/conf/Config.java b/skywalking-api/src/main/java/com/ai/cloud/skywalking/conf/Config.java
index f1b800fcc..76be48395 100644
--- a/skywalking-api/src/main/java/com/ai/cloud/skywalking/conf/Config.java
+++ b/skywalking-api/src/main/java/com/ai/cloud/skywalking/conf/Config.java
@@ -32,9 +32,6 @@ public class Config {
     }
 
     public static class Sender {
-        // 发送的最大条数
-        public static int MAX_BUFFER_DATA_SIZE = 1;
-
         // 最大发送者的连接数阀比例
         public static int CONNECT_PERCENT = 50;