diff --git a/include/libs/transport/trpc.h b/include/libs/transport/trpc.h
index acfd5dfb51553a37c856d8cd0792e6dd0e1f91ec..0cc0ab64eff68ff00e25213eb8ed57ba04916988 100644
--- a/include/libs/transport/trpc.h
+++ b/include/libs/transport/trpc.h
@@ -115,8 +115,9 @@ typedef struct SRpcInit {
   int32_t connLimitNum;
   int32_t connLimitLock;
 
-  int8_t supportBatch;  // 0: no batch, 1. batch
-  void  *parent;
+  int8_t  supportBatch;  // 0: no batch, 1. batch
+  int32_t batchSize;
+  void   *parent;
 } SRpcInit;
 
 typedef struct {
diff --git a/source/dnode/mgmt/node_mgmt/src/dmTransport.c b/source/dnode/mgmt/node_mgmt/src/dmTransport.c
index f35352268f864f3c1a2c138b954e5e6513e9d9cc..4e9b7149e42956b88b8881c60901dd761b271eb9 100644
--- a/source/dnode/mgmt/node_mgmt/src/dmTransport.c
+++ b/source/dnode/mgmt/node_mgmt/src/dmTransport.c
@@ -286,11 +286,12 @@ int32_t dmInitClient(SDnode *pDnode) {
 
   int32_t connLimitNum = 10000 / (tsNumOfRpcThreads * 3);
   connLimitNum = TMAX(connLimitNum, 100);
-  connLimitNum = TMIN(connLimitNum, 600);
+  connLimitNum = TMIN(connLimitNum, 500);
 
   rpcInit.connLimitNum = connLimitNum;
   rpcInit.connLimitLock = 1;
   rpcInit.supportBatch = 1;
+  rpcInit.batchSize = 64 * 1024;
 
   pTrans->clientRpc = rpcOpen(&rpcInit);
   if (pTrans->clientRpc == NULL) {
diff --git a/source/libs/transport/inc/transportInt.h b/source/libs/transport/inc/transportInt.h
index 13adb4d2b4a92a263a36d40b28ce0d007dabf416..1f3c98ad7283c3f1594a67499d6fad8c0f886f47 100644
--- a/source/libs/transport/inc/transportInt.h
+++ b/source/libs/transport/inc/transportInt.h
@@ -67,6 +67,7 @@ typedef struct {
   int32_t connLimitNum;
   int8_t  connLimitLock;  // 0: no lock. 1. lock
   int8_t  supportBatch;   // 0: no batch, 1: support batch
+  int32_t batchSize;
 
   int           index;
   void*         parent;
diff --git a/source/libs/transport/src/trans.c b/source/libs/transport/src/trans.c
index 38ec1c7fdccf6cb360ae141b52465ccb8c03fb88..16ea25a41abb70bb1a60c8a84cd3536d054779eb 100644
--- a/source/libs/transport/src/trans.c
+++ b/source/libs/transport/src/trans.c
@@ -70,6 +70,7 @@ void* rpcOpen(const SRpcInit* pInit) {
   pRpc->connLimitNum = pInit->connLimitNum;
   pRpc->connLimitLock = pInit->connLimitLock;
   pRpc->supportBatch = pInit->supportBatch;
+  pRpc->batchSize = pInit->batchSize;
 
   pRpc->numOfThreads = pInit->numOfThreads > TSDB_MAX_RPC_THREADS ? TSDB_MAX_RPC_THREADS : pInit->numOfThreads;
   if (pRpc->numOfThreads <= 0) {
diff --git a/source/libs/transport/src/transCli.c b/source/libs/transport/src/transCli.c
index f106e07e37f37fff4da50d7fbaf346ef6664e296..f0635d376cac106900f8c747c320baeef0ebfc36 100644
--- a/source/libs/transport/src/transCli.c
+++ b/source/libs/transport/src/transCli.c
@@ -27,6 +27,7 @@ typedef struct {
   int connMax;
   int connCnt;
   int batchLenLimit;
+  int sending;
 
   char*    dst;
   char*    ip;
@@ -992,6 +993,8 @@ static void cliDestroyBatch(SCliBatch* pBatch) {
     SCliMsg* p = QUEUE_DATA(h, SCliMsg, q);
     destroyCmsg(p);
   }
+  SCliBatchList* p = pBatch->pList;
+  p->sending -= 1;
   taosMemoryFree(pBatch);
 }
 static void cliHandleBatchReq(SCliBatch* pBatch, SCliThrd* pThrd) {
@@ -1461,11 +1464,12 @@ static void cliNoBatchDealReq(queue* wq, SCliThrd* pThrd) {
   }
 }
 SCliBatch* cliGetHeadFromList(SCliBatchList* pList) {
-  if (QUEUE_IS_EMPTY(&pList->wq) || pList->connCnt >= pList->connMax) {
+  if (QUEUE_IS_EMPTY(&pList->wq) || pList->connCnt > pList->connMax || pList->sending > pList->connMax) {
     return NULL;
   }
   queue* hr = QUEUE_HEAD(&pList->wq);
   QUEUE_REMOVE(hr);
+  pList->sending += 1;
 
   pList->len -= 1;
 
@@ -1474,6 +1478,8 @@ SCliBatch* cliGetHeadFromList(SCliBatchList* pList) {
 }
 
 static void cliBatchDealReq(queue* wq, SCliThrd* pThrd) {
+  STrans* pInst = pThrd->pTransInst;
+
   int count = 0;
   while (!QUEUE_IS_EMPTY(wq)) {
     queue* h = QUEUE_HEAD(wq);
@@ -1493,9 +1499,10 @@ static void cliBatchDealReq(queue* wq, SCliThrd* pThrd) {
       if (ppBatchList == NULL || *ppBatchList == NULL) {
         SCliBatchList* pBatchList = taosMemoryCalloc(1, sizeof(SCliBatchList));
         QUEUE_INIT(&pBatchList->wq);
-        pBatchList->connMax = 200;
+        pBatchList->connMax = pInst->connLimitNum;
         pBatchList->connCnt = 0;
-        pBatchList->batchLenLimit = 16 * 1024;
+        pBatchList->batchLenLimit = pInst->batchSize;
+
         pBatchList->ip = strdup(ip);
         pBatchList->dst = strdup(key);
         pBatchList->port = port;
diff --git a/source/libs/transport/test/cliBench.c b/source/libs/transport/test/cliBench.c
index 5901a71929deadb40d96ccf4f2e5a69544f3a7fa..aaee162cd754eb1e209fc21d8568fd703c57d303 100644
--- a/source/libs/transport/test/cliBench.c
+++ b/source/libs/transport/test/cliBench.c
@@ -114,8 +114,9 @@ int main(int argc, char *argv[]) {
   rpcInit.user = "michael";
 
   rpcInit.connType = TAOS_CONN_CLIENT;
-  rpcInit.connLimitNum = 300;
+  rpcInit.connLimitNum = 10;
   rpcInit.connLimitLock = 1;
+  rpcInit.batchSize = 16 * 1024;
   rpcInit.supportBatch = 1;
 
   rpcDebugFlag = 135;