diff --git a/include/common/tglobal.h b/include/common/tglobal.h
index 5a0c0e0777..e92afc2222 100644
--- a/include/common/tglobal.h
+++ b/include/common/tglobal.h
@@ -49,6 +49,7 @@ extern int32_t tsTagFilterResCacheSize;
 
 // queue & threads
 extern int32_t tsNumOfRpcThreads;
+extern int32_t tsNumOfRpcSessions;
 extern int32_t tsNumOfCommitThreads;
 extern int32_t tsNumOfTaskQueueThreads;
 extern int32_t tsNumOfMnodeQueryThreads;
@@ -86,9 +87,9 @@ extern int32_t  tsTelemInterval;
 extern char     tsTelemServer[];
 extern uint16_t tsTelemPort;
 extern bool     tsEnableCrashReport;
-extern char*    tsTelemUri;
-extern char*    tsClientCrashReportUri;
-extern char*    tsSvrCrashReportUri;
+extern char    *tsTelemUri;
+extern char    *tsClientCrashReportUri;
+extern char    *tsSvrCrashReportUri;
 
 // query buffer management
 extern int32_t tsQueryBufferSize;  // maximum allowed usage buffer size in MB for each data node during query processing
@@ -159,7 +160,7 @@ extern int32_t tsUptimeInterval;
 extern int32_t tsRpcRetryLimit;
 extern int32_t tsRpcRetryInterval;
 
-extern bool    tsDisableStream;
+extern bool tsDisableStream;
 
 // #define NEEDTO_COMPRESSS_MSG(size) (tsCompressMsgSize != -1 && (size) > tsCompressMsgSize)
 
diff --git a/source/common/src/tglobal.c b/source/common/src/tglobal.c
index 1e5291b7cb..e636dffdd9 100644
--- a/source/common/src/tglobal.c
+++ b/source/common/src/tglobal.c
@@ -41,6 +41,7 @@ bool    tsPrintAuth = false;
 
 // queue & threads
 int32_t tsNumOfRpcThreads = 1;
+int32_t tsNumOfRpcSessions = 2000;
 int32_t tsNumOfCommitThreads = 2;
 int32_t tsNumOfTaskQueueThreads = 4;
 int32_t tsNumOfMnodeQueryThreads = 4;
@@ -54,7 +55,6 @@ int32_t tsNumOfQnodeQueryThreads = 4;
 int32_t tsNumOfQnodeFetchThreads = 1;
 int32_t tsNumOfSnodeStreamThreads = 4;
 int32_t tsNumOfSnodeWriteThreads = 1;
-
 // sync raft
 int32_t tsElectInterval = 25 * 1000;
 int32_t tsHeartbeatInterval = 1000;
@@ -392,6 +392,9 @@ static int32_t taosAddServerCfg(SConfig *pCfg) {
   tsNumOfRpcThreads = TRANGE(tsNumOfRpcThreads, 2, TSDB_MAX_RPC_THREADS);
   if (cfgAddInt32(pCfg, "numOfRpcThreads", tsNumOfRpcThreads, 1, 1024, 0) != 0) return -1;
 
+  tsNumOfRpcSessions = TRANGE(tsNumOfRpcSessions, 100, 10000);
+  if (cfgAddInt32(pCfg, "numOfRpcSessions", tsNumOfRpcSessions, 1, 1024, 0) != 0) return -1;
+
   tsNumOfCommitThreads = tsNumOfCores / 2;
   tsNumOfCommitThreads = TRANGE(tsNumOfCommitThreads, 2, 4);
   if (cfgAddInt32(pCfg, "numOfCommitThreads", tsNumOfCommitThreads, 1, 1024, 0) != 0) return -1;
@@ -504,6 +507,14 @@ static int32_t taosUpdateServerCfg(SConfig *pCfg) {
     pItem->stype = stype;
   }
 
+  pItem = cfgGetItem(tsCfg, "numOfRpcSessions");
+  if (pItem != NULL && pItem->stype == CFG_STYPE_DEFAULT) {
+    tsNumOfRpcSessions = 2000;
+    tsNumOfRpcSessions = TRANGE(tsNumOfRpcSessions, 100, 10000);
+    pItem->i32 = tsNumOfRpcSessions;
+    pItem->stype = stype;
+  }
+
   pItem = cfgGetItem(tsCfg, "numOfCommitThreads");
   if (pItem != NULL && pItem->stype == CFG_STYPE_DEFAULT) {
     tsNumOfCommitThreads = numOfCores / 2;
@@ -721,6 +732,7 @@ static int32_t taosSetServerCfg(SConfig *pCfg) {
   tsPrintAuth = cfgGetItem(pCfg, "printAuth")->bval;
 
   tsNumOfRpcThreads = cfgGetItem(pCfg, "numOfRpcThreads")->i32;
+  tsNumOfRpcSessions = cfgGetItem(pCfg, "numOfRpcSessions")->i32;
   tsNumOfCommitThreads = cfgGetItem(pCfg, "numOfCommitThreads")->i32;
   tsNumOfMnodeReadThreads = cfgGetItem(pCfg, "numOfMnodeReadThreads")->i32;
   tsNumOfVnodeQueryThreads = cfgGetItem(pCfg, "numOfVnodeQueryThreads")->i32;
@@ -771,7 +783,7 @@ static int32_t taosSetServerCfg(SConfig *pCfg) {
   if (tsQueryBufferSize >= 0) {
     tsQueryBufferSizeBytes = tsQueryBufferSize * 1048576UL;
   }
-  
+
   tsDisableStream = cfgGetItem(pCfg, "disableStream")->bval;
 
   GRANT_CFG_GET;
@@ -980,6 +992,8 @@ int32_t taosSetCfg(SConfig *pCfg, char *name) {
         tsNumOfTaskQueueThreads = cfgGetItem(pCfg, "numOfTaskQueueThreads")->i32;
       } else if (strcasecmp("numOfRpcThreads", name) == 0) {
         tsNumOfRpcThreads = cfgGetItem(pCfg, "numOfRpcThreads")->i32;
+      } else if (strcasecmp("numOfRpcSessions", name) == 0) {
+        tsNumOfRpcSessions = cfgGetItem(pCfg, "numOfRpcSessions")->i32;
       } else if (strcasecmp("numOfCommitThreads", name) == 0) {
         tsNumOfCommitThreads = cfgGetItem(pCfg, "numOfCommitThreads")->i32;
       } else if (strcasecmp("numOfMnodeReadThreads", name) == 0) {
diff --git a/source/dnode/mgmt/node_mgmt/src/dmTransport.c b/source/dnode/mgmt/node_mgmt/src/dmTransport.c
index 659dae142e..3992dbc3e1 100644
--- a/source/dnode/mgmt/node_mgmt/src/dmTransport.c
+++ b/source/dnode/mgmt/node_mgmt/src/dmTransport.c
@@ -284,9 +284,9 @@ int32_t dmInitClient(SDnode *pDnode) {
   rpcInit.failFastThreshold = 3;    // failed threshold
   rpcInit.ffp = dmFailFastFp;
 
-  int32_t connLimitNum = 1000 / (tsNumOfRpcThreads * 3);
+  int32_t connLimitNum = tsNumOfRpcSessions / (tsNumOfRpcThreads * 3);
   connLimitNum = TMAX(connLimitNum, 10);
-  connLimitNum = TMIN(connLimitNum, 50);
+  connLimitNum = TMIN(connLimitNum, 500);
 
   rpcInit.connLimitNum = connLimitNum;
   rpcInit.connLimitLock = 1;