diff --git a/source/libs/transport/inc/transComm.h b/source/libs/transport/inc/transComm.h
index b931118f04..376c764f2c 100644
--- a/source/libs/transport/inc/transComm.h
+++ b/source/libs/transport/inc/transComm.h
@@ -497,7 +497,8 @@ enum { REQ_STATUS_INIT = 0, REQ_STATUS_PROCESSING };
 #define BUFFER_LIMIT 4
 
 typedef struct {
-  queue      q;
+  queue      node;  // queue for write
+  queue      q;     // queue for reqs
   uv_write_t wreq;
   void*      arg;
 } SWReqsWrapper;
diff --git a/source/libs/transport/src/transComm.c b/source/libs/transport/src/transComm.c
index 7814ccafac..8f3a112058 100644
--- a/source/libs/transport/src/transComm.c
+++ b/source/libs/transport/src/transComm.c
@@ -15,7 +15,7 @@
 
 #include "transComm.h"
 
-#define BUFFER_CAP 16 * 4096
+#define BUFFER_CAP 8 * 1024
 
 static TdThreadOnce transModuleInit = PTHREAD_ONCE_INIT;
 
@@ -893,6 +893,7 @@ int32_t initWQ(queue* wq) {
     SWReqsWrapper* w = taosMemoryCalloc(1, sizeof(SWReqsWrapper));
     w->wreq.data = w;
     w->arg = NULL;
+    QUEUE_INIT(&w->node);
     QUEUE_PUSH(wq, &w->q);
   }
   return 0;
@@ -912,13 +913,19 @@ uv_write_t* allocWReqFromWQ(queue* wq, void* arg) {
     QUEUE_REMOVE(node);
     SWReqsWrapper* w = QUEUE_DATA(node, SWReqsWrapper, q);
     w->arg = arg;
+    QUEUE_INIT(&w->node);
+
     return &w->wreq;
   } else {
     SWReqsWrapper* w = taosMemoryCalloc(1, sizeof(SWReqsWrapper));
     w->wreq.data = w;
     w->arg = arg;
+    QUEUE_INIT(&w->node);
     return &w->wreq;
   }
 }
 
-void freeWReqToWQ(queue* wq, SWReqsWrapper* w) { QUEUE_PUSH(wq, &w->q); }
\ No newline at end of file
+void freeWReqToWQ(queue* wq, SWReqsWrapper* w) {
+  QUEUE_INIT(&w->node);
+  QUEUE_PUSH(wq, &w->q);
+}
\ No newline at end of file
diff --git a/source/libs/transport/src/transSvr.c b/source/libs/transport/src/transSvr.c
index c5fc6067e8..20e3df98ec 100644
--- a/source/libs/transport/src/transSvr.c
+++ b/source/libs/transport/src/transSvr.c
@@ -648,16 +648,17 @@ void uvOnSendCb(uv_write_t* req, int status) {
   STUB_RAND_NETWORK_ERR(status);
 
   SWReqsWrapper* wrapper = req->data;
+  SSvrConn*      conn = wrapper->arg;
 
-  SWriteReq* userReq = wrapper->arg;
-  SSvrConn*  conn = userReq->conn;
-  queue*     src = &userReq->node;
+  queue src;
+  QUEUE_INIT(&src);
+  QUEUE_MOVE(&wrapper->node, &src);
 
   freeWReqToWQ(&conn->wq, wrapper);
 
   tDebug("%s conn %p send data out ", transLabel(conn->pInst), conn);
   if (status == 0) {
-    while (!QUEUE_IS_EMPTY(src)) {
+    while (!QUEUE_IS_EMPTY(&src)) {
       queue* head = QUEUE_HEAD(&src);
       QUEUE_REMOVE(head);
 
@@ -668,7 +669,7 @@ void uvOnSendCb(uv_write_t* req, int status) {
       destroySmsg(smsg);
     }
   } else {
-    while (!QUEUE_IS_EMPTY(src)) {
+    while (!QUEUE_IS_EMPTY(&src)) {
       queue* head = QUEUE_HEAD(&src);
       QUEUE_REMOVE(head);
 
@@ -682,7 +683,6 @@ void uvOnSendCb(uv_write_t* req, int status) {
     conn->broken = true;
     transUnrefSrvHandle(conn);
   }
-  taosMemoryFree(userReq);
   transUnrefSrvHandle(conn);
 }
 static void uvOnPipeWriteCb(uv_write_t* req, int status) {
@@ -800,11 +800,8 @@ static FORCE_INLINE void uvStartSendRespImpl(SSvrRespMsg* smsg) {
     return;
   }
 
-  SWriteReq* pWreq = taosMemoryCalloc(1, sizeof(SWriteReq));
-  pWreq->conn = pConn;
-  QUEUE_INIT(&pWreq->node);
-
-  uv_write_t* req = allocWReqFromWQ(&pConn->wq, pWreq);
+  uv_write_t*    req = allocWReqFromWQ(&pConn->wq, pConn);
+  SWReqsWrapper* pWreq = req->data;
 
   uv_buf_t* pBuf = NULL;
   int32_t   bufNum = 0;