diff --git a/source/client/src/clientEnv.c b/source/client/src/clientEnv.c
index 7f83c573eabae7207f46834216fbbf65b593d967..79c5baf43d8971d2e4384ddec6ce3c92a14c25bc 100644
--- a/source/client/src/clientEnv.c
+++ b/source/client/src/clientEnv.c
@@ -84,7 +84,6 @@ static void deregisterRequest(SRequestObj *pRequest) {
            pRequest->self, pTscObj->id, pRequest->requestId, duration / 1000.0, num, currentInst);
 
   if (pRequest->pQuery && pRequest->pQuery->pRoot) {
-
     if (QUERY_NODE_VNODE_MODIFY_STMT == pRequest->pQuery->pRoot->type &&
         (0 == ((SVnodeModifyOpStmt *)pRequest->pQuery->pRoot)->sqlNodeType)) {
       tscDebug("insert duration %" PRId64 "us: parseCost:%" PRId64 "us, ctgCost:%" PRId64 "us, analyseCost:%" PRId64
@@ -160,7 +159,7 @@ void *openTransporter(const char *user, const char *auth, int32_t numOfThread) {
   rpcInit.retryMaxInterval = tsRedirectMaxPeriod;
   rpcInit.retryMaxTimouet = tsMaxRetryWaitTime;
 
-  int32_t connLimitNum = tsNumOfRpcSessions / (tsNumOfRpcThreads * 3);
+  int32_t connLimitNum = tsNumOfRpcSessions / (tsNumOfRpcThreads * 5);
   connLimitNum = TMAX(connLimitNum, 10);
   connLimitNum = TMIN(connLimitNum, 500);
   rpcInit.connLimitNum = connLimitNum;
@@ -524,7 +523,7 @@ void taos_init_imp(void) {
     if (code) {
       printf("failed to init memory dbg, error:%s\n", tstrerror(code));
     } else {
-      tsAsyncLog = false;    
+      tsAsyncLog = false;
       printf("memory dbg enabled\n");
     }
   }
diff --git a/source/common/src/tglobal.c b/source/common/src/tglobal.c
index 2275345d7fcd6560201f7e047ff4cecdfd77e5c0..99795fcc794ecf875497abf3bb180cfd92e4919d 100644
--- a/source/common/src/tglobal.c
+++ b/source/common/src/tglobal.c
@@ -41,8 +41,8 @@ bool    tsPrintAuth = false;
 
 // queue & threads
 int32_t tsNumOfRpcThreads = 1;
-int32_t tsNumOfRpcSessions = 10000;
-int32_t tsTimeToGetAvailableConn = 10000;
+int32_t tsNumOfRpcSessions = 5000;
+int32_t tsTimeToGetAvailableConn = 100000;
 int32_t tsNumOfCommitThreads = 2;
 int32_t tsNumOfTaskQueueThreads = 4;
 int32_t tsNumOfMnodeQueryThreads = 4;