diff --git a/src/common/inc/tglobal.h b/src/common/inc/tglobal.h
index 234fb80be0a2b1b745de364b47918b1e789c43bc..f462cc1037f972328da01969aa4b420ad225407e 100644
--- a/src/common/inc/tglobal.h
+++ b/src/common/inc/tglobal.h
@@ -44,6 +44,7 @@ extern int32_t  tsDnodeId;
 extern int64_t  tsDnodeStartTime;
 extern int8_t   tsDnodeNopLoop;
 extern int32_t  tsTcpConnTimeout;
+extern int32_t  tsSyncCheckInterval;
 
 // common
 extern int      tsRpcTimer;
diff --git a/src/common/src/tglobal.c b/src/common/src/tglobal.c
index dffdc3a6eb0c3efa39ae3363fa192228c3ee78c4..0e4d412cdc6c6df9c975513d68866b295816abba 100644
--- a/src/common/src/tglobal.c
+++ b/src/common/src/tglobal.c
@@ -48,7 +48,8 @@ char     tsEmail[TSDB_FQDN_LEN] = {0};
 int32_t  tsDnodeId = 0;
 int64_t  tsDnodeStartTime = 0;
 int8_t   tsDnodeNopLoop = 0;
-int32_t  tsTcpConnTimeout = 1; // timeout for tcp client connection in second.
+int32_t  tsTcpConnTimeout = 1000; // timeout for tcp client connection in ms.
+int32_t  tsSyncCheckInterval = 1000; // peer sync check interval in ms.
 
 // common
 int32_t tsRpcTimer = 300;
@@ -641,7 +642,17 @@ static void doInitGlobalConfig(void) {
   cfg.valType = TAOS_CFG_VTYPE_INT32;
   cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_SHOW;
   cfg.minValue = 1;
-  cfg.maxValue = 10;
+  cfg.maxValue = 10000;
+  cfg.ptrLength = 0;
+  cfg.unitType = TAOS_CFG_UTYPE_SECOND;
+  taosInitConfigOption(cfg);
+
+  cfg.option = "syncCheckInterval";
+  cfg.ptr = &tsSyncCheckInterval;
+  cfg.valType = TAOS_CFG_VTYPE_INT32;
+  cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_SHOW;
+  cfg.minValue = 1;
+  cfg.maxValue = 10000;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_SECOND;
   taosInitConfigOption(cfg);
diff --git a/src/sync/src/syncMain.c b/src/sync/src/syncMain.c
index a8b5a8f403cb9ca0c897d77db280e5a331c1f32e..be35f3aaf9ed80fb66414e918e920fcd714620e1 100644
--- a/src/sync/src/syncMain.c
+++ b/src/sync/src/syncMain.c
@@ -871,7 +871,7 @@ static void syncRestartPeer(SSyncPeer *pPeer) {
   int32_t ret = strcmp(pPeer->fqdn, tsNodeFqdn);
   if (pPeer->nodeId == 0 || ret > 0 || (ret == 0 && pPeer->port > tsSyncPort)) {
     sDebug("%s, check peer connection in 1000 ms", pPeer->id);
-    taosTmrReset(syncCheckPeerConnection, SYNC_CHECK_INTERVAL, (void *)pPeer->rid, tsSyncTmrCtrl, &pPeer->timer);
+    taosTmrReset(syncCheckPeerConnection, tsSyncCheckInterval, (void *)pPeer->rid, tsSyncTmrCtrl, &pPeer->timer);
   }
 }
 
@@ -976,7 +976,7 @@ static void syncRecoverFromMaster(SSyncPeer *pPeer) {
   SSyncMsg msg;
   syncBuildSyncReqMsg(&msg, pNode->vgId);
 
-  taosTmrReset(syncNotStarted, SYNC_CHECK_INTERVAL, (void *)pPeer->rid, tsSyncTmrCtrl, &pPeer->timer);
+  taosTmrReset(syncNotStarted, tsSyncCheckInterval, (void *)pPeer->rid, tsSyncTmrCtrl, &pPeer->timer);
 
   if (taosWriteMsg(pPeer->peerFd, &msg, sizeof(SSyncMsg)) != sizeof(SSyncMsg)) {
     sError("%s, failed to send sync-req to peer", pPeer->id);
@@ -1149,14 +1149,14 @@ static void syncSetupPeerConnection(SSyncPeer *pPeer) {
 
   uint32_t ip = syncResolvePeerFqdn(pPeer);
   if (!ip) {
-    taosTmrReset(syncCheckPeerConnection, SYNC_CHECK_INTERVAL, (void *)pPeer->rid, tsSyncTmrCtrl, &pPeer->timer);
+    taosTmrReset(syncCheckPeerConnection, tsSyncCheckInterval, (void *)pPeer->rid, tsSyncTmrCtrl, &pPeer->timer);
     return;
   }
 
   SOCKET connFd = taosOpenTcpClientSocket(ip, pPeer->port, 0);
   if (connFd <= 0) {
     sDebug("%s, failed to open tcp socket since %s", pPeer->id, strerror(errno));
-    taosTmrReset(syncCheckPeerConnection, SYNC_CHECK_INTERVAL, (void *)pPeer->rid, tsSyncTmrCtrl, &pPeer->timer);
+    taosTmrReset(syncCheckPeerConnection, tsSyncCheckInterval, (void *)pPeer->rid, tsSyncTmrCtrl, &pPeer->timer);
     return;
   }
 
@@ -1177,7 +1177,7 @@ static void syncSetupPeerConnection(SSyncPeer *pPeer) {
   } else {
     sDebug("%s, failed to setup peer connection to server since %s, try later", pPeer->id, strerror(errno));
     taosCloseSocket(connFd);
-    taosTmrReset(syncCheckPeerConnection, SYNC_CHECK_INTERVAL, (void *)pPeer->rid, tsSyncTmrCtrl, &pPeer->timer);
+    taosTmrReset(syncCheckPeerConnection, tsSyncCheckInterval, (void *)pPeer->rid, tsSyncTmrCtrl, &pPeer->timer);
   }
 }
 
diff --git a/src/util/inc/tconfig.h b/src/util/inc/tconfig.h
index c0a4986936f7d43d48aa4fac0be6f427f5db32f5..acff4168cfbbd2c1b8578fe0075ac173bfd43beb 100644
--- a/src/util/inc/tconfig.h
+++ b/src/util/inc/tconfig.h
@@ -20,7 +20,7 @@
 extern "C" {
 #endif
 
-#define TSDB_CFG_MAX_NUM    133
+#define TSDB_CFG_MAX_NUM    135
 #define TSDB_CFG_PRINT_LEN  23
 #define TSDB_CFG_OPTION_LEN 24
 #define TSDB_CFG_VALUE_LEN  41
diff --git a/src/util/src/tsocket.c b/src/util/src/tsocket.c
index 808c3c8eaa9100a724b58654f240ab45b31be543..0ebe9c8f8af23186fb4cd60824bfa5641d2090a9 100644
--- a/src/util/src/tsocket.c
+++ b/src/util/src/tsocket.c
@@ -363,7 +363,7 @@ SOCKET taosOpenTcpClientSocket(uint32_t destIp, uint16_t destPort, uint32_t clie
       wfd[0].fd = sockFd;
       wfd[0].events = POLLOUT;
     
-      int res = poll(wfd, 1, tsTcpConnTimeout * 1000);
+      int res = poll(wfd, 1, tsTcpConnTimeout);
       if (res == -1 || res == 0) {
         uError("failed to connect socket, ip:0x%x, port:%hu(poll error/conn timeout)", destIp, destPort);
         taosCloseSocket(sockFd); //