diff --git a/docs/en/12-taos-sql/06-select.md b/docs/en/12-taos-sql/06-select.md
index c065245827f8e7edbb0297abef4aa9e5de4a45cc..570defe1a7d2061c383d27f7969d6c4d5d0b30f5 100644
--- a/docs/en/12-taos-sql/06-select.md
+++ b/docs/en/12-taos-sql/06-select.md
@@ -11,7 +11,7 @@ SELECT {DATABASE() | CLIENT_VERSION() | SERVER_VERSION() | SERVER_STATUS() | NOW
 SELECT [DISTINCT] select_list
     from_clause
     [WHERE condition]
-    [PARTITION BY tag_list]
+    [partition_by_clause]
     [window_clause]
     [group_by_clause]
     [order_by_clasue]
@@ -52,6 +52,9 @@ window_clause: {
   | STATE_WINDOW(col)
   | INTERVAL(interval_val [, interval_offset]) [SLIDING (sliding_val)] [WATERMARK(watermark_val)] [FILL(fill_mod_and_val)]
 
+partition_by_clause:
+    PARTITION BY expr [, expr] ... 
+
 group_by_clause:
     GROUP BY expr [, expr] ... HAVING condition
 
diff --git a/docs/zh/12-taos-sql/06-select.md b/docs/zh/12-taos-sql/06-select.md
index b3b8ef38873d20acaefa13515ff0d5785c5acc86..3ffc081cd723c4511c913bd6e7c517cbdc2aedb5 100644
--- a/docs/zh/12-taos-sql/06-select.md
+++ b/docs/zh/12-taos-sql/06-select.md
@@ -12,7 +12,7 @@ SELECT {DATABASE() | CLIENT_VERSION() | SERVER_VERSION() | SERVER_STATUS() | NOW
 SELECT [DISTINCT] select_list
     from_clause
     [WHERE condition]
-    [PARTITION BY tag_list]
+    [partition_by_clause]
     [window_clause]
     [group_by_clause]
     [order_by_clasue]
@@ -53,6 +53,9 @@ window_clause: {
   | STATE_WINDOW(col)
   | INTERVAL(interval_val [, interval_offset]) [SLIDING (sliding_val)] [WATERMARK(watermark_val)] [FILL(fill_mod_and_val)]
 
+partition_by_clause:
+    PARTITION BY expr [, expr] ... 
+
 group_by_clause:
     GROUP BY expr [, expr] ... HAVING condition
 
diff --git a/source/common/src/tglobal.c b/source/common/src/tglobal.c
index c0203dadb82066992510fde7143a82d68afb023b..ce9a9a7b5099825b731542fc71810b2d4bf867fd 100644
--- a/source/common/src/tglobal.c
+++ b/source/common/src/tglobal.c
@@ -374,8 +374,8 @@ static int32_t taosAddServerCfg(SConfig *pCfg) {
   tsNumOfVnodeStreamThreads = TMAX(tsNumOfVnodeStreamThreads, 4);
   if (cfgAddInt32(pCfg, "numOfVnodeStreamThreads", tsNumOfVnodeStreamThreads, 4, 1024, 0) != 0) return -1;
 
-  tsNumOfVnodeFetchThreads = 1;
-  if (cfgAddInt32(pCfg, "numOfVnodeFetchThreads", tsNumOfVnodeFetchThreads, 1, 1024, 0) != 0) return -1;
+//  tsNumOfVnodeFetchThreads = 1;
+//  if (cfgAddInt32(pCfg, "numOfVnodeFetchThreads", tsNumOfVnodeFetchThreads, 1, 1, 0) != 0) return -1;
 
   tsNumOfVnodeWriteThreads = tsNumOfCores;
   tsNumOfVnodeWriteThreads = TMAX(tsNumOfVnodeWriteThreads, 1);
@@ -497,6 +497,7 @@ static int32_t taosUpdateServerCfg(SConfig *pCfg) {
     pItem->stype = stype;
   }
 
+/*
   pItem = cfgGetItem(tsCfg, "numOfVnodeFetchThreads");
   if (pItem != NULL && pItem->stype == CFG_STYPE_DEFAULT) {
     tsNumOfVnodeFetchThreads = numOfCores / 4;
@@ -504,6 +505,7 @@ static int32_t taosUpdateServerCfg(SConfig *pCfg) {
     pItem->i32 = tsNumOfVnodeFetchThreads;
     pItem->stype = stype;
   }
+*/
 
   pItem = cfgGetItem(tsCfg, "numOfVnodeWriteThreads");
   if (pItem != NULL && pItem->stype == CFG_STYPE_DEFAULT) {
@@ -703,7 +705,7 @@ static int32_t taosSetServerCfg(SConfig *pCfg) {
   tsNumOfMnodeReadThreads = cfgGetItem(pCfg, "numOfMnodeReadThreads")->i32;
   tsNumOfVnodeQueryThreads = cfgGetItem(pCfg, "numOfVnodeQueryThreads")->i32;
   tsNumOfVnodeStreamThreads = cfgGetItem(pCfg, "numOfVnodeStreamThreads")->i32;
-  tsNumOfVnodeFetchThreads = cfgGetItem(pCfg, "numOfVnodeFetchThreads")->i32;
+//  tsNumOfVnodeFetchThreads = cfgGetItem(pCfg, "numOfVnodeFetchThreads")->i32;
   tsNumOfVnodeWriteThreads = cfgGetItem(pCfg, "numOfVnodeWriteThreads")->i32;
   tsNumOfVnodeSyncThreads = cfgGetItem(pCfg, "numOfVnodeSyncThreads")->i32;
   tsNumOfVnodeRsmaThreads = cfgGetItem(pCfg, "numOfVnodeRsmaThreads")->i32;
@@ -953,8 +955,10 @@ int32_t taosSetCfg(SConfig *pCfg, char *name) {
         tsNumOfMnodeReadThreads = cfgGetItem(pCfg, "numOfMnodeReadThreads")->i32;
       } else if (strcasecmp("numOfVnodeQueryThreads", name) == 0) {
         tsNumOfVnodeQueryThreads = cfgGetItem(pCfg, "numOfVnodeQueryThreads")->i32;
+/*
       } else if (strcasecmp("numOfVnodeFetchThreads", name) == 0) {
         tsNumOfVnodeFetchThreads = cfgGetItem(pCfg, "numOfVnodeFetchThreads")->i32;
+*/
       } else if (strcasecmp("numOfVnodeWriteThreads", name) == 0) {
         tsNumOfVnodeWriteThreads = cfgGetItem(pCfg, "numOfVnodeWriteThreads")->i32;
       } else if (strcasecmp("numOfVnodeSyncThreads", name) == 0) {