diff --git a/src/mnode/src/mnodeTable.c b/src/mnode/src/mnodeTable.c
index 23b62f1aa36acc44c311fa3772cf4292a9a7d9b8..82322d43b8efc2c921f678d1afed868968b7bf41 100644
--- a/src/mnode/src/mnodeTable.c
+++ b/src/mnode/src/mnodeTable.c
@@ -382,11 +382,13 @@ static void mnodeAddTableIntoStable(SSuperTableObj *pStable, SChildTableObj *pCt
   pStable->numOfTables++;
 
   if (pStable->vgHash == NULL) {
-    pStable->vgHash = taosHashInit(100000, taosGetDefaultHashFunction(TSDB_DATA_TYPE_INT), false);
+    pStable->vgHash = taosHashInit(64, taosGetDefaultHashFunction(TSDB_DATA_TYPE_INT), false);
   }
 
   if (pStable->vgHash != NULL) {
-    taosHashPut(pStable->vgHash, (char *)&pCtable->vgId, sizeof(pCtable->vgId), &pCtable->vgId, sizeof(pCtable->vgId));
+    if (taosHashGet(pStable->vgHash, &pCtable->vgId, sizeof(pCtable->vgId)) == NULL) {
+      taosHashPut(pStable->vgHash, &pCtable->vgId, sizeof(pCtable->vgId), &pCtable->vgId, sizeof(pCtable->vgId));
+    }
   }
 }
 
diff --git a/src/plugins/http/src/httpSql.c b/src/plugins/http/src/httpSql.c
index d0e9b005fd5515d1f4f9887c456462183cb72fda..9d3efca01d4c97d5db7cc21df8a2c67ff1e39251 100644
--- a/src/plugins/http/src/httpSql.c
+++ b/src/plugins/http/src/httpSql.c
@@ -359,6 +359,8 @@ void httpExecCmd(HttpContext *pContext) {
 
 void httpProcessRequestCb(void *param, TAOS_RES *result, int code) {
   HttpContext *pContext = param;
+  taos_free_result(result);
+  
   if (pContext == NULL) return;
 
   if (code < 0) {