diff --git a/source/common/src/tglobal.c b/source/common/src/tglobal.c
index a7d80fe5db..53169019b6 100644
--- a/source/common/src/tglobal.c
+++ b/source/common/src/tglobal.c
@@ -58,7 +58,7 @@ int32_t tsNumOfMnodeQueryThreads = 4;
 int32_t tsNumOfMnodeFetchThreads = 1;
 int32_t tsNumOfMnodeReadThreads = 1;
 int32_t tsNumOfVnodeQueryThreads = 4;
-float   tsRatioOfVnodeStreamThreads = 1.0;
+float   tsRatioOfVnodeStreamThreads = 0.5F;
 int32_t tsNumOfVnodeFetchThreads = 4;
 int32_t tsNumOfVnodeRsmaThreads = 2;
 int32_t tsNumOfQnodeQueryThreads = 4;
@@ -622,7 +622,7 @@ static int32_t taosAddServerCfg(SConfig *pCfg) {
       0)
     return -1;
 
-  if (cfgAddFloat(pCfg, "ratioOfVnodeStreamThreads", tsRatioOfVnodeStreamThreads, 0.01, 10, CFG_SCOPE_SERVER,
+  if (cfgAddFloat(pCfg, "ratioOfVnodeStreamThreads", tsRatioOfVnodeStreamThreads, 0.01, 4, CFG_SCOPE_SERVER,
                   CFG_DYN_NONE) != 0)
     return -1;
 
diff --git a/source/util/src/tworker.c b/source/util/src/tworker.c
index 57dc60e539..28f7fd4783 100644
--- a/source/util/src/tworker.c
+++ b/source/util/src/tworker.c
@@ -221,7 +221,7 @@ STaosQueue *tAutoQWorkerAllocQueue(SAutoQWorkerPool *pool, void *ahandle, FItem
   int32_t queueNum = taosGetQueueNumber(pool->qset);
   int32_t curWorkerNum = taosArrayGetSize(pool->workers);
   int32_t dstWorkerNum = ceilf(queueNum * pool->ratio);
-  if (dstWorkerNum < 1) dstWorkerNum = 1;
+  if (dstWorkerNum < 2) dstWorkerNum = 2;
 
   // spawn a thread to process queue
   while (curWorkerNum < dstWorkerNum) {