diff --git a/a8/tcplistener.h b/a8/tcplistener.h
index 0722013..09caa3b 100644
--- a/a8/tcplistener.h
+++ b/a8/tcplistener.h
@@ -1,6 +1,8 @@
 #ifndef A8_TCPLISTENER_H
 #define A8_TCPLISTENER_H
 
+#include <atomic>
+
 namespace a8
 {
 
@@ -22,6 +24,7 @@ namespace a8
         std::function<void (a8::TcpListener*, a8::TCPLISTENER_E, int)> on_error;
         std::string bind_address;
         unsigned short bind_port = 0;
+        std::atomic<long long> send_node_num = {0};
 
     public:
         TcpListener(unsigned short max_client_cnt=0xEFFF);
diff --git a/a8/tcpsession2.cc b/a8/tcpsession2.cc
index 3bc7c6e..4e3c25c 100644
--- a/a8/tcpsession2.cc
+++ b/a8/tcpsession2.cc
@@ -136,6 +136,7 @@ namespace a8
             }
 #endif
             send_buffer_mutex_.unlock();
+            ++master->send_node_num;
         }
     }
 
@@ -161,6 +162,7 @@ namespace a8
     void TcpSession::Reset()
     {
         ClearSendBuff();
+        ClearWorkBuff();
         socket_ = -1;
         remote_address = "";
         remote_port = 0;
@@ -182,6 +184,7 @@ namespace a8
         }
         Close();
         ClearSendBuff();
+        ClearWorkBuff();
     }
 
     void TcpSession::_ForceClose()
@@ -299,13 +302,10 @@ namespace a8
     void TcpSession::ClearSendBuff()
     {
         a8::SendQueueNode* p_top_node_  = nullptr;
-        a8::SendQueueNode* p_work_node_ = nullptr;
         send_buffer_mutex_.lock();
         p_top_node_ = top_node_;
-        p_work_node_ = work_node_;
         top_node_ = nullptr;
         bot_node_ = nullptr;
-        work_node_ = nullptr;
         send_buffer_mutex_.unlock();
 
         a8::SendQueueNode *pdelnode = nullptr;
@@ -316,14 +316,20 @@ namespace a8
                 free(pdelnode->buff);
             }
             free(pdelnode);
+            --master->send_node_num;
         }
-        while (p_work_node_) {
-            pdelnode = p_work_node_;
-            p_work_node_ = p_work_node_->next;
+    }
+
+    void TcpSession::ClearWorkBuff()
+    {
+        while (work_node_) {
+            a8::SendQueueNode *pdelnode = work_node_;
+            work_node_ = work_node_->next;
             if (pdelnode->buff) {
                 free(pdelnode->buff);
             }
             free(pdelnode);
+            --master->send_node_num;
         }
     }
 
@@ -347,6 +353,7 @@ namespace a8
             if (work_node_->sent_bytes >= work_node_->bufflen) {
                 a8::SendQueueNode *pdelnode = work_node_;
                 work_node_ = work_node_->next;
+                --master->send_node_num;
                 if (!work_node_) {
                     send_buffer_mutex_.lock();
                     if (top_node_) {
diff --git a/a8/tcpsession2.h b/a8/tcpsession2.h
index 3e954d5..ea029f0 100644
--- a/a8/tcpsession2.h
+++ b/a8/tcpsession2.h
@@ -52,6 +52,7 @@ namespace a8
     private:
 
         void ClearSendBuff();
+        void ClearWorkBuff();
         void AsyncSend();
         void NotifyEpollSend();
         int DirectSend(a8::SendQueueNode* node);