diff --git a/source/client/src/clientEnv.c b/source/client/src/clientEnv.c
index 79c5baf43d..e3e20ee85d 100644
--- a/source/client/src/clientEnv.c
+++ b/source/client/src/clientEnv.c
@@ -159,9 +159,9 @@ void *openTransporter(const char *user, const char *auth, int32_t numOfThread) {
   rpcInit.retryMaxInterval = tsRedirectMaxPeriod;
   rpcInit.retryMaxTimouet = tsMaxRetryWaitTime;
 
-  int32_t connLimitNum = tsNumOfRpcSessions / (tsNumOfRpcThreads * 5);
+  int32_t connLimitNum = tsNumOfRpcSessions / (tsNumOfRpcThreads * 3);
   connLimitNum = TMAX(connLimitNum, 10);
-  connLimitNum = TMIN(connLimitNum, 500);
+  connLimitNum = TMIN(connLimitNum, 1000);
   rpcInit.connLimitNum = connLimitNum;
   rpcInit.timeToGetConn = tsTimeToGetAvailableConn;
 
diff --git a/source/common/src/tglobal.c b/source/common/src/tglobal.c
index 4bb64e5fd6..0d03e1a11a 100644
--- a/source/common/src/tglobal.c
+++ b/source/common/src/tglobal.c
@@ -41,7 +41,7 @@ bool    tsPrintAuth = false;
 
 // queue & threads
 int32_t tsNumOfRpcThreads = 1;
-int32_t tsNumOfRpcSessions = 6000;
+int32_t tsNumOfRpcSessions = 10000;
 int32_t tsTimeToGetAvailableConn = 500000;
 int32_t tsNumOfCommitThreads = 2;
 int32_t tsNumOfTaskQueueThreads = 4;