diff --git a/include/common/tglobal.h b/include/common/tglobal.h
index 0e22985059..fd0521af3b 100644
--- a/include/common/tglobal.h
+++ b/include/common/tglobal.h
@@ -93,6 +93,7 @@ extern int64_t tsQueryBufferSizeBytes;  // maximum allowed usage buffer size in
 
 // query client
 extern int32_t tsQueryPolicy;
+extern int32_t tsQueryRspPolicy;
 extern int32_t tsQuerySmaOptimize;
 extern int32_t tsQueryRsmaTolerance;
 extern bool    tsQueryPlannerTrace;
diff --git a/include/libs/qcom/query.h b/include/libs/qcom/query.h
index 777fe1c4df..7d95e840e9 100644
--- a/include/libs/qcom/query.h
+++ b/include/libs/qcom/query.h
@@ -54,6 +54,9 @@ typedef enum {
 #define QUERY_POLICY_QNODE  3
 #define QUERY_POLICY_CLIENT 4
 
+#define QUERY_RSP_POLICY_DELAY 0
+#define QUERY_RSP_POLICY_QUICK 1
+
 typedef struct STableComInfo {
   uint8_t  numOfTags;     // the number of tags in schema
   uint8_t  precision;     // the number of precision
diff --git a/source/client/src/clientImpl.c b/source/client/src/clientImpl.c
index 7b437e4769..940dd745c8 100644
--- a/source/client/src/clientImpl.c
+++ b/source/client/src/clientImpl.c
@@ -1036,30 +1036,38 @@ static int32_t asyncExecSchQuery(SRequestObj* pRequest, SQuery* pQuery, SMetaDat
   pRequest->type = pQuery->msgType;
 
   SArray*      pMnodeList = taosArrayInit(4, sizeof(SQueryNodeLoad));
+
   SPlanContext cxt = {.queryId = pRequest->requestId,
-                      .acctId = pRequest->pTscObj->acctId,
-                      .mgmtEpSet = getEpSet_s(&pRequest->pTscObj->pAppInfo->mgmtEp),
-                      .pAstRoot = pQuery->pRoot,
-                      .showRewrite = pQuery->showRewrite,
-                      .pMsg = pRequest->msgBuf,
-                      .msgLen = ERROR_MSG_BUF_DEFAULT_SIZE,
-                      .pUser = pRequest->pTscObj->user,
-                      .sysInfo = pRequest->pTscObj->sysInfo,
-                      .allocatorId = pRequest->allocatorRefId};
-  SQueryPlan*  pDag = NULL;
-  int32_t      code = qCreateQueryPlan(&cxt, &pDag, pMnodeList);
-  if (code) {
-    tscError("0x%" PRIx64 " failed to create query plan, code:%s 0x%" PRIx64, pRequest->self, tstrerror(code),
-             pRequest->requestId);
-  } else {
-    pRequest->body.subplanNum = pDag->numOfSubplans;
+                          .acctId = pRequest->pTscObj->acctId,
+                          .mgmtEpSet = getEpSet_s(&pRequest->pTscObj->pAppInfo->mgmtEp),
+                          .pAstRoot = pQuery->pRoot,
+                          .showRewrite = pQuery->showRewrite,
+                          .pMsg = pRequest->msgBuf,
+                          .msgLen = ERROR_MSG_BUF_DEFAULT_SIZE,
+                          .pUser = pRequest->pTscObj->user,
+                          .sysInfo = pRequest->pTscObj->sysInfo,
+                          .allocatorId = pRequest->allocatorRefId};
+
+      SAppInstInfo* pAppInfo = getAppInfo(pRequest);
+      SQueryPlan*   pDag = NULL;
+
+  int64_t st = taosGetTimestampUs();
+  int32_t code = qCreateQueryPlan(&cxt, &pDag, pMnodeList);
+      if (code) {
+        tscError("0x%" PRIx64 " failed to create query plan, code:%s 0x%" PRIx64, pRequest->self, tstrerror(code),
+                 pRequest->requestId);
+      } else {
+        pRequest->body.subplanNum = pDag->numOfSubplans;
+      }
+
+      pRequest->metric.planEnd = taosGetTimestampUs();
+  if (code == TSDB_CODE_SUCCESS) {
+    tscDebug("0x%" PRIx64 " create query plan success, elapsed time:%.2f ms, 0x%" PRIx64, pRequest->self,
+             (pRequest->metric.planEnd - st)/1000.0, pRequest->requestId);
   }
-
-  pRequest->metric.planEnd = taosGetTimestampUs();
-
-  if (TSDB_CODE_SUCCESS == code && !pRequest->validateOnly) {
-    SArray* pNodeList = NULL;
-    buildAsyncExecNodeList(pRequest, &pNodeList, pMnodeList, pResultMeta);
+      if (TSDB_CODE_SUCCESS == code && !pRequest->validateOnly) {
+        SArray* pNodeList = NULL;
+        buildAsyncExecNodeList(pRequest, &pNodeList, pMnodeList, pResultMeta);
 
     SRequestConnInfo conn = {.pTrans = getAppInfo(pRequest)->pTransporter,
                              .requestId = pRequest->requestId,
diff --git a/source/client/test/clientTests.cpp b/source/client/test/clientTests.cpp
index e69174476a..21a52a4b57 100644
--- a/source/client/test/clientTests.cpp
+++ b/source/client/test/clientTests.cpp
@@ -52,15 +52,15 @@ void printResult(TAOS_RES* pRes) {
   int32_t n = 0;
   char    str[512] = {0};
   while ((pRow = taos_fetch_row(pRes)) != NULL) {
-    int32_t* length = taos_fetch_lengths(pRes);
-    for (int32_t i = 0; i < numOfFields; ++i) {
-      printf("(%d):%d ", i, length[i]);
-    }
-    printf("\n");
-
-    int32_t code = taos_print_row(str, pRow, pFields, numOfFields);
-    printf("%s\n", str);
-    memset(str, 0, sizeof(str));
+//    int32_t* length = taos_fetch_lengths(pRes);
+//    for(int32_t i = 0; i < numOfFields; ++i) {
+//      printf("(%d):%d " , i, length[i]);
+//    }
+//    printf("\n");
+//
+//    int32_t code = taos_print_row(str, pRow, pFields, numOfFields);
+//    printf("%s\n", str);
+//    memset(str, 0, sizeof(str));
   }
 }
 
@@ -102,17 +102,6 @@ void queryCallback(void* param, void* res, int32_t code) {
   taos_fetch_raw_block_a(res, fetchCallback, param);
 }
 
-void queryCallback1(void* param, void* res, int32_t code) {
-  if (code != TSDB_CODE_SUCCESS) {
-    printf("failed to execute, reason:%s\n", taos_errstr(res));
-  }
-
-  taos_free_result(res);
-
-  printf("exec query:\n");
-  taos_query_a(param, "select * from tm1", queryCallback, param);
-}
-
 void createNewTable(TAOS* pConn, int32_t index) {
   char str[1024] = {0};
   sprintf(str, "create table tu%d using st2 tags(%d)", index, index);
@@ -123,7 +112,7 @@ void createNewTable(TAOS* pConn, int32_t index) {
   }
   taos_free_result(pRes);
 
-  for (int32_t i = 0; i < 3280; i += 20) {
+  for(int32_t i = 0; i < 10000; i += 20) {
     char sql[1024] = {0};
     sprintf(sql,
             "insert into tu%d values(now+%da, %d)(now+%da, %d)(now+%da, %d)(now+%da, %d)"
@@ -141,10 +130,49 @@ void createNewTable(TAOS* pConn, int32_t index) {
     taos_free_result(p);
   }
 }
+
+void *queryThread(void *arg) {
+  TAOS* pConn = taos_connect("192.168.0.209", "root", "taosdata", NULL, 0);
+  if (pConn == NULL) {
+    printf("failed to connect to db, reason:%s", taos_errstr(pConn));
+    return NULL;
+  }
+
+  int64_t el = 0;
+
+  for (int32_t i = 0; i < 5000000; ++i) {
+    int64_t st = taosGetTimestampUs();
+    TAOS_RES* pRes = taos_query(pConn,
+                      "SELECT _wstart as ts,max(usage_user) FROM benchmarkcpu.host_49 WHERE  ts >= 1451618560000 AND ts < 1451622160000 INTERVAL(1m) ;");
+    if (taos_errno(pRes) != 0) {
+      printf("failed, reason:%s\n", taos_errstr(pRes));
+    } else {
+      printResult(pRes);
+    }
+
+    taos_free_result(pRes);
+    el += (taosGetTimestampUs() - st);
+    if (i % 1000 == 0 && i != 0) {
+      printf("total:%d, avg time:%.2fms\n", i, el/(double)(i*1000));
+    }
+  }
+
+  taos_close(pConn);
+  return NULL;
+}
+
+static int32_t numOfThreads = 1;
 }  // namespace
 
 int main(int argc, char** argv) {
   testing::InitGoogleTest(&argc, argv);
+  if (argc > 1) {
+    numOfThreads = atoi(argv[1]);
+  }
+
+  numOfThreads = TMAX(numOfThreads, 1);
+  printf("the runing threads is:%d", numOfThreads);
+
   return RUN_ALL_TESTS();
 }
 
@@ -664,7 +692,6 @@ TEST(testCase, insert_test) {
   taos_free_result(pRes);
   taos_close(pConn);
 }
-#endif
 
 TEST(testCase, projection_query_tables) {
   TAOS* pConn = taos_connect("localhost", "root", "taosdata", NULL, 0);
@@ -676,13 +703,14 @@ TEST(testCase, projection_query_tables) {
   //  }
   //  taos_free_result(pRes);
 
-  TAOS_RES* pRes = taos_query(pConn, "use abc1");
+  TAOS_RES* pRes = taos_query(pConn, "use benchmarkcpu");
   taos_free_result(pRes);
 
   pRes = taos_query(pConn, "create stable st1 (ts timestamp, k int) tags(a int)");
   if (taos_errno(pRes) != 0) {
     printf("failed to create table tu, reason:%s\n", taos_errstr(pRes));
   }
+
   taos_free_result(pRes);
 
   pRes = taos_query(pConn, "create stable st2 (ts timestamp, k int) tags(a int)");
@@ -722,6 +750,16 @@ TEST(testCase, projection_query_tables) {
   taos_free_result(pRes);
   taos_close(pConn);
 }
+#endif
+
+TEST(testCase, tsbs_perf_test) {
+  TdThread qid[20] = {0};
+
+  for(int32_t i = 0; i < numOfThreads; ++i) {
+    taosThreadCreate(&qid[i], NULL, queryThread, NULL);
+  }
+  getchar();
+}
 
 #if 0
 TEST(testCase, projection_query_stables) {
diff --git a/source/common/src/tglobal.c b/source/common/src/tglobal.c
index 88df54a9ea..56daa4075a 100644
--- a/source/common/src/tglobal.c
+++ b/source/common/src/tglobal.c
@@ -90,6 +90,7 @@ bool tsSmlDataFormat = false;
 
 // query
 int32_t tsQueryPolicy = 1;
+int32_t tsQueryRspPolicy = 0;
 int32_t tsQuerySmaOptimize = 0;
 int32_t tsQueryRsmaTolerance = 1000;  // the tolerance time (ms) to judge from which level to query rsma data.
 bool    tsQueryPlannerTrace = false;
@@ -350,6 +351,7 @@ static int32_t taosAddServerCfg(SConfig *pCfg) {
   if (cfgAddInt32(pCfg, "countAlwaysReturnValue", tsCountAlwaysReturnValue, 0, 1, 0) != 0) return -1;
   if (cfgAddInt32(pCfg, "queryBufferSize", tsQueryBufferSize, -1, 500000000000, 0) != 0) return -1;
   if (cfgAddBool(pCfg, "printAuth", tsPrintAuth, 0) != 0) return -1;
+  if (cfgAddInt32(pCfg, "queryRspPolicy", tsQueryRspPolicy, 0, 1, 0) != 0) return -1;
 
   if (cfgAddInt32(pCfg, "multiProcess", tsMultiProcess, 0, 2, 0) != 0) return -1;
   if (cfgAddInt32(pCfg, "mnodeShmSize", tsMnodeShmSize, TSDB_MAX_MSG_SIZE * 2 + 1024, INT32_MAX, 0) != 0) return -1;
@@ -728,6 +730,7 @@ static int32_t taosSetServerCfg(SConfig *pCfg) {
   tsMonitorPort = (uint16_t)cfgGetItem(pCfg, "monitorPort")->i32;
   tsMonitorMaxLogs = cfgGetItem(pCfg, "monitorMaxLogs")->i32;
   tsMonitorComp = cfgGetItem(pCfg, "monitorComp")->bval;
+  tsQueryRspPolicy = cfgGetItem(pCfg, "queryRspPolicy")->i32;
 
   tsEnableTelem = cfgGetItem(pCfg, "telemetryReporting")->bval;
   tsTelemInterval = cfgGetItem(pCfg, "telemetryInterval")->i32;
diff --git a/source/dnode/mgmt/mgmt_mnode/src/mmWorker.c b/source/dnode/mgmt/mgmt_mnode/src/mmWorker.c
index d2b071ec61..849d3ef390 100644
--- a/source/dnode/mgmt/mgmt_mnode/src/mmWorker.c
+++ b/source/dnode/mgmt/mgmt_mnode/src/mmWorker.c
@@ -72,7 +72,7 @@ static void mmProcessRpcMsg(SQueueInfo *pInfo, SRpcMsg *pMsg) {
     mndPostProcessQueryMsg(pMsg);
   }
 
-  dGTrace("msg:%p, is freed, code:0x%x", pMsg, code);
+  dGTrace("msg:%p is freed, code:%s", pMsg, tstrerror(code));
   rpcFreeCont(pMsg->pCont);
   taosFreeQitem(pMsg);
 }
diff --git a/source/dnode/vnode/src/tsdb/tsdbMergeTree.c b/source/dnode/vnode/src/tsdb/tsdbMergeTree.c
index 03d4a975f2..09a46b59bb 100644
--- a/source/dnode/vnode/src/tsdb/tsdbMergeTree.c
+++ b/source/dnode/vnode/src/tsdb/tsdbMergeTree.c
@@ -543,6 +543,7 @@ int32_t tMergeTreeOpen(SMergeTree *pMTree, int8_t backward, SDataFReader *pFRead
 
   pMTree->pLoadInfo = pBlockLoadInfo;
   pMTree->destroyLoadInfo = destroyLoadInfo;
+  ASSERT(pMTree->pLoadInfo != NULL);
 
   for (int32_t i = 0; i < pFReader->pSet->nSttF; ++i) {  // open all last file
     struct SLDataIter *pIter = NULL;
diff --git a/source/dnode/vnode/src/tsdb/tsdbRead.c b/source/dnode/vnode/src/tsdb/tsdbRead.c
index a7850f3114..6b706901ba 100644
--- a/source/dnode/vnode/src/tsdb/tsdbRead.c
+++ b/source/dnode/vnode/src/tsdb/tsdbRead.c
@@ -3395,19 +3395,20 @@ int32_t tsdbReaderOpen(SVnode* pVnode, SQueryTableDataCond* pCond, SArray* pTabl
     goto _err;
   }
 
-  code = tsdbTakeReadSnap(pReader->pTsdb, &pReader->pReadSnap, pReader->idStr);
-  if (code != TSDB_CODE_SUCCESS) {
-    goto _err;
-  }
-
-  if (pReader->type == TIMEWINDOW_RANGE_CONTAINED) {
-    code = doOpenReaderImpl(pReader);
+  if (numOfTables > 0) {
+    code = tsdbTakeReadSnap(pReader->pTsdb, &pReader->pReadSnap, pReader->idStr);
     if (code != TSDB_CODE_SUCCESS) {
-      return code;
+      goto _err;
     }
-  } else {
-    STsdbReader* pPrevReader = pReader->innerReader[0];
-    STsdbReader* pNextReader = pReader->innerReader[1];
+
+    if (pReader->type == TIMEWINDOW_RANGE_CONTAINED) {
+      code = doOpenReaderImpl(pReader);
+      if (code != TSDB_CODE_SUCCESS) {
+        return code;
+      }
+    } else {
+      STsdbReader* pPrevReader = pReader->innerReader[0];
+      STsdbReader* pNextReader = pReader->innerReader[1];
 
     // we need only one row
     pPrevReader->capacity = 1;
@@ -3422,19 +3423,20 @@ int32_t tsdbReaderOpen(SVnode* pVnode, SQueryTableDataCond* pCond, SArray* pTabl
     pNextReader->pMemSchema = pReader->pMemSchema;
     pNextReader->pReadSnap = pReader->pReadSnap;
 
-    code = doOpenReaderImpl(pPrevReader);
-    if (code != TSDB_CODE_SUCCESS) {
-      return code;
-    }
+      code = doOpenReaderImpl(pPrevReader);
+      if (code != TSDB_CODE_SUCCESS) {
+        return code;
+      }
 
-    code = doOpenReaderImpl(pNextReader);
-    if (code != TSDB_CODE_SUCCESS) {
-      return code;
-    }
+      code = doOpenReaderImpl(pNextReader);
+      if (code != TSDB_CODE_SUCCESS) {
+        return code;
+      }
 
-    code = doOpenReaderImpl(pReader);
-    if (code != TSDB_CODE_SUCCESS) {
-      return code;
+      code = doOpenReaderImpl(pReader);
+      if (code != TSDB_CODE_SUCCESS) {
+        return code;
+      }
     }
   }
 
@@ -3513,6 +3515,10 @@ void tsdbReaderClose(STsdbReader* pReader) {
     taosMemoryFree(pLReader);
   }
 
+  if (pReader->innerReader[0] != 0) {
+    tsdbUntakeReadSnap(pReader->innerReader[0]->pTsdb, pReader->innerReader[0]->pReadSnap, pReader->idStr);
+  }
+
   tsdbDebug(
       "%p :io-cost summary: head-file:%" PRIu64 ", head-file time:%.2f ms, SMA:%" PRId64
       " SMA-time:%.2f ms, fileBlocks:%" PRId64
diff --git a/source/libs/executor/inc/executorimpl.h b/source/libs/executor/inc/executorimpl.h
index d6e0de0eb1..fc996a6003 100644
--- a/source/libs/executor/inc/executorimpl.h
+++ b/source/libs/executor/inc/executorimpl.h
@@ -212,6 +212,7 @@ typedef struct SExprSupp {
   int32_t         numOfExprs;  // the number of scalar expression in group operator
   SqlFunctionCtx* pCtx;
   int32_t*        rowEntryInfoOffset;  // offset value for each row result cell info
+  SFilterInfo*    pFilterInfo;
 } SExprSupp;
 
 typedef struct SOperatorInfo {
@@ -926,7 +927,7 @@ int32_t getTableScanInfo(SOperatorInfo* pOperator, int32_t* order, int32_t* scan
 int32_t getBufferPgSize(int32_t rowSize, uint32_t* defaultPgsz, uint32_t* defaultBufsz);
 
 void    doSetOperatorCompleted(SOperatorInfo* pOperator);
-void    doFilter(const SNode* pFilterNode, SSDataBlock* pBlock, const SArray* pColMatchInfo);
+void    doFilter(const SNode* pFilterNode, SSDataBlock* pBlock, const SArray* pColMatchInfo, SFilterInfo* pFilterInfo);
 int32_t addTagPseudoColumnData(SReadHandle* pHandle, SExprInfo* pPseudoExpr, int32_t numOfPseudoExpr,
                                SSDataBlock* pBlock, const char* idStr);
 
diff --git a/source/libs/executor/src/executorimpl.c b/source/libs/executor/src/executorimpl.c
index 8c1104f519..ea01b961b1 100644
--- a/source/libs/executor/src/executorimpl.c
+++ b/source/libs/executor/src/executorimpl.c
@@ -1113,15 +1113,24 @@ void setResultRowInitCtx(SResultRow* pResult, SqlFunctionCtx* pCtx, int32_t numO
 static void extractQualifiedTupleByFilterResult(SSDataBlock* pBlock, const SColumnInfoData* p, bool keep,
                                                 int32_t status);
 
-void doFilter(const SNode* pFilterNode, SSDataBlock* pBlock, const SArray* pColMatchInfo) {
+void doFilter(const SNode* pFilterNode, SSDataBlock* pBlock, const SArray* pColMatchInfo, SFilterInfo* pFilterInfo) {
   if (pFilterNode == NULL || pBlock->info.rows == 0) {
     return;
   }
 
-  SFilterInfo* filter = NULL;
+  SFilterInfo* filter = pFilterInfo;
+  int64_t st = taosGetTimestampUs();
+
+//  pError("start filter");
 
   // todo move to the initialization function
-  int32_t            code = filterInitFromNode((SNode*)pFilterNode, &filter, 0);
+  int32_t code = 0;
+  bool needFree = false;
+  if (filter == NULL) {
+    needFree = true;
+    code = filterInitFromNode((SNode*)pFilterNode, &filter, 0);
+  }
+
   SFilterColumnParam param1 = {.numOfCols = taosArrayGetSize(pBlock->pDataBlock), .pDataBlock = pBlock->pDataBlock};
   code = filterSetDataFromSlotId(filter, &param1);
 
@@ -1130,7 +1139,10 @@ void doFilter(const SNode* pFilterNode, SSDataBlock* pBlock, const SArray* pColM
 
   // todo the keep seems never to be True??
   bool keep = filterExecute(filter, pBlock, &p, NULL, param1.numOfCols, &status);
-  filterFreeInfo(filter);
+
+  if (needFree) {
+    filterFreeInfo(filter);
+  }
 
   extractQualifiedTupleByFilterResult(pBlock, p, keep, status);
 
@@ -2479,7 +2491,7 @@ static SSDataBlock* getAggregateResult(SOperatorInfo* pOperator) {
   blockDataEnsureCapacity(pInfo->pRes, pOperator->resultInfo.capacity);
   while (1) {
     doBuildResultDatablock(pOperator, pInfo, &pAggInfo->groupResInfo, pAggInfo->aggSup.pResultBuf);
-    doFilter(pAggInfo->pCondition, pInfo->pRes, NULL);
+    doFilter(pAggInfo->pCondition, pInfo->pRes, NULL, NULL);
 
     if (!hasRemainResults(&pAggInfo->groupResInfo)) {
       doSetOperatorCompleted(pOperator);
@@ -2873,7 +2885,7 @@ static SSDataBlock* doFill(SOperatorInfo* pOperator) {
       break;
     }
 
-    doFilter(pInfo->pCondition, fillResult, pInfo->pColMatchColInfo);
+    doFilter(pInfo->pCondition, fillResult, pInfo->pColMatchColInfo, NULL);
     if (fillResult->info.rows > 0) {
       break;
     }
@@ -3049,6 +3061,12 @@ void cleanupExprSupp(SExprSupp* pSupp) {
     destroyExprInfo(pSupp->pExprInfo, pSupp->numOfExprs);
     taosMemoryFreeClear(pSupp->pExprInfo);
   }
+
+  if (pSupp->pFilterInfo != NULL) {
+    filterFreeInfo(pSupp->pFilterInfo);
+    pSupp->pFilterInfo = NULL;
+  }
+
   taosMemoryFree(pSupp->rowEntryInfoOffset);
 }
 
diff --git a/source/libs/executor/src/groupoperator.c b/source/libs/executor/src/groupoperator.c
index b0bb9e42b9..e62f72c8f8 100644
--- a/source/libs/executor/src/groupoperator.c
+++ b/source/libs/executor/src/groupoperator.c
@@ -311,7 +311,7 @@ static SSDataBlock* buildGroupResultDataBlock(SOperatorInfo* pOperator) {
   SSDataBlock* pRes = pInfo->binfo.pRes;
   while (1) {
     doBuildResultDatablock(pOperator, &pInfo->binfo, &pInfo->groupResInfo, pInfo->aggSup.pResultBuf);
-    doFilter(pInfo->pCondition, pRes, NULL);
+    doFilter(pInfo->pCondition, pRes, NULL, NULL);
 
     if (!hasRemainResults(&pInfo->groupResInfo)) {
       doSetOperatorCompleted(pOperator);
diff --git a/source/libs/executor/src/joinoperator.c b/source/libs/executor/src/joinoperator.c
index b4aa6de0a8..53cfa6c27a 100644
--- a/source/libs/executor/src/joinoperator.c
+++ b/source/libs/executor/src/joinoperator.c
@@ -387,7 +387,7 @@ SSDataBlock* doMergeJoin(struct SOperatorInfo* pOperator) {
       break;
     }
     if (pJoinInfo->pCondAfterMerge != NULL) {
-      doFilter(pJoinInfo->pCondAfterMerge, pRes, NULL);
+      doFilter(pJoinInfo->pCondAfterMerge, pRes, NULL, NULL);
     }
     if (pRes->info.rows >= pOperator->resultInfo.threshold) {
       break;
diff --git a/source/libs/executor/src/projectoperator.c b/source/libs/executor/src/projectoperator.c
index e9e6fed66a..fe6ee4129a 100644
--- a/source/libs/executor/src/projectoperator.c
+++ b/source/libs/executor/src/projectoperator.c
@@ -315,7 +315,7 @@ SSDataBlock* doProjectOperation(SOperatorInfo* pOperator) {
       }
 
       // do apply filter
-      doFilter(pProjectInfo->pFilterNode, pFinalRes, NULL);
+      doFilter(pProjectInfo->pFilterNode, pFinalRes, NULL, NULL);
 
       // when apply the limit/offset for each group, pRes->info.rows may be 0, due to limit constraint.
       if (pFinalRes->info.rows > 0 || (pOperator->status == OP_EXEC_DONE)) {
@@ -325,7 +325,7 @@ SSDataBlock* doProjectOperation(SOperatorInfo* pOperator) {
     } else {
       // do apply filter
       if (pRes->info.rows > 0) {
-        doFilter(pProjectInfo->pFilterNode, pRes, NULL);
+        doFilter(pProjectInfo->pFilterNode, pRes, NULL, NULL);
         if (pRes->info.rows == 0) {
           continue;
         }
@@ -518,7 +518,7 @@ SSDataBlock* doApplyIndefinitFunction(SOperatorInfo* pOperator) {
       }
     }
 
-    doFilter(pIndefInfo->pCondition, pInfo->pRes, NULL);
+    doFilter(pIndefInfo->pCondition, pInfo->pRes, NULL, NULL);
     size_t rows = pInfo->pRes->info.rows;
     if (rows > 0 || pOperator->status == OP_EXEC_DONE) {
       break;
@@ -620,7 +620,7 @@ SSDataBlock* doGenerateSourceData(SOperatorInfo* pOperator) {
   }
 
   pRes->info.rows = 1;
-  doFilter(pProjectInfo->pFilterNode, pRes, NULL);
+  doFilter(pProjectInfo->pFilterNode, pRes, NULL, NULL);
 
   /*int32_t status = */ doIngroupLimitOffset(&pProjectInfo->limitInfo, 0, pRes, pOperator);
 
diff --git a/source/libs/executor/src/scanoperator.c b/source/libs/executor/src/scanoperator.c
index 7ede06e6ca..c0c38e2b30 100644
--- a/source/libs/executor/src/scanoperator.c
+++ b/source/libs/executor/src/scanoperator.c
@@ -385,7 +385,7 @@ static int32_t loadDataBlock(SOperatorInfo* pOperator, STableScanInfo* pTableSca
 
   if (pTableScanInfo->pFilterNode != NULL) {
     int64_t st = taosGetTimestampUs();
-    doFilter(pTableScanInfo->pFilterNode, pBlock, pTableScanInfo->pColMatchInfo);
+    doFilter(pTableScanInfo->pFilterNode, pBlock, pTableScanInfo->pColMatchInfo, pOperator->exprSupp.pFilterInfo);
 
     double el = (taosGetTimestampUs() - st) / 1000.0;
     pTableScanInfo->readRecorder.filterTime += el;
@@ -754,6 +754,11 @@ SOperatorInfo* createTableScanOperatorInfo(STableScanPhysiNode* pTableScanNode,
   pInfo->dataBlockLoadFlag = pTableScanNode->dataRequired;
   pInfo->pResBlock = createResDataBlock(pDescNode);
   pInfo->pFilterNode = pTableScanNode->scan.node.pConditions;
+
+  if (pInfo->pFilterNode != NULL) {
+    code = filterInitFromNode((SNode*)pInfo->pFilterNode, &pOperator->exprSupp.pFilterInfo, 0);
+  }
+
   pInfo->scanFlag = MAIN_SCAN;
   pInfo->pColMatchInfo = pColList;
   pInfo->currentGroupId = -1;
@@ -1123,7 +1128,7 @@ static SSDataBlock* doRangeScan(SStreamScanInfo* pInfo, SSDataBlock* pSDB, int32
       return NULL;
     }
 
-    doFilter(pInfo->pCondition, pResult, NULL);
+    doFilter(pInfo->pCondition, pResult, NULL, NULL);
     if (pResult->info.rows == 0) {
       continue;
     }
@@ -1474,7 +1479,7 @@ static int32_t setBlockIntoRes(SStreamScanInfo* pInfo, const SSDataBlock* pBlock
   }
 
   if (filter) {
-    doFilter(pInfo->pCondition, pInfo->pRes, NULL);
+    doFilter(pInfo->pCondition, pInfo->pRes, NULL, NULL);
   }
   blockDataUpdateTsWindow(pInfo->pRes, pInfo->primaryTsIndex);
   blockDataFreeRes((SSDataBlock*)pBlock);
@@ -1896,7 +1901,7 @@ FETCH_NEXT_BLOCK:
           }
         }
 
-        doFilter(pInfo->pCondition, pInfo->pRes, NULL);
+        doFilter(pInfo->pCondition, pInfo->pRes, NULL, NULL);
         blockDataUpdateTsWindow(pInfo->pRes, pInfo->primaryTsIndex);
 
         if (pBlockInfo->rows > 0 || pInfo->pUpdateDataRes->info.rows > 0) {
@@ -2382,7 +2387,7 @@ static SSDataBlock* doFilterResult(SSysTableScanInfo* pInfo) {
     return pInfo->pRes->info.rows == 0 ? NULL : pInfo->pRes;
   }
 
-  doFilter(pInfo->pCondition, pInfo->pRes, NULL);
+  doFilter(pInfo->pCondition, pInfo->pRes, NULL, NULL);
   return pInfo->pRes->info.rows == 0 ? NULL : pInfo->pRes;
 }
 
@@ -3455,7 +3460,7 @@ static int32_t loadDataBlockFromOneTable(SOperatorInfo* pOperator, STableMergeSc
 
   if (pTableScanInfo->pFilterNode != NULL) {
     int64_t st = taosGetTimestampMs();
-    doFilter(pTableScanInfo->pFilterNode, pBlock, pTableScanInfo->pColMatchInfo);
+    doFilter(pTableScanInfo->pFilterNode, pBlock, pTableScanInfo->pColMatchInfo, NULL);
 
     double el = (taosGetTimestampUs() - st) / 1000.0;
     pTableScanInfo->readRecorder.filterTime += el;
diff --git a/source/libs/executor/src/sortoperator.c b/source/libs/executor/src/sortoperator.c
index ed3247e10e..c651529c7a 100644
--- a/source/libs/executor/src/sortoperator.c
+++ b/source/libs/executor/src/sortoperator.c
@@ -216,7 +216,7 @@ SSDataBlock* doSort(SOperatorInfo* pOperator) {
       return NULL;
     }
 
-    doFilter(pInfo->pCondition, pBlock, pInfo->pColMatchInfo);
+    doFilter(pInfo->pCondition, pBlock, pInfo->pColMatchInfo, NULL);
     if (blockDataGetNumOfRows(pBlock) == 0) {
       continue;
     }
diff --git a/source/libs/executor/src/tfill.c b/source/libs/executor/src/tfill.c
index 5be9918185..88af03775c 100644
--- a/source/libs/executor/src/tfill.c
+++ b/source/libs/executor/src/tfill.c
@@ -1501,7 +1501,7 @@ static SSDataBlock* doStreamFill(SOperatorInfo* pOperator) {
     }
 
     doStreamFillImpl(pOperator);
-    doFilter(pInfo->pCondition, pInfo->pRes, pInfo->pColMatchColInfo);
+    doFilter(pInfo->pCondition, pInfo->pRes, pInfo->pColMatchColInfo, NULL);
     pOperator->resultInfo.totalRows += pInfo->pRes->info.rows;
     if (pInfo->pRes->info.rows > 0) {
       break;
diff --git a/source/libs/executor/src/timewindowoperator.c b/source/libs/executor/src/timewindowoperator.c
index df16914cb8..c1478bc935 100644
--- a/source/libs/executor/src/timewindowoperator.c
+++ b/source/libs/executor/src/timewindowoperator.c
@@ -1277,7 +1277,7 @@ static SSDataBlock* doStateWindowAgg(SOperatorInfo* pOperator) {
   blockDataEnsureCapacity(pBInfo->pRes, pOperator->resultInfo.capacity);
   while (1) {
     doBuildResultDatablock(pOperator, &pInfo->binfo, &pInfo->groupResInfo, pInfo->aggSup.pResultBuf);
-    doFilter(pInfo->pCondition, pBInfo->pRes, NULL);
+    doFilter(pInfo->pCondition, pBInfo->pRes, NULL, NULL);
 
     bool hasRemain = hasRemainResults(&pInfo->groupResInfo);
     if (!hasRemain) {
@@ -1315,7 +1315,7 @@ static SSDataBlock* doBuildIntervalResult(SOperatorInfo* pOperator) {
     blockDataEnsureCapacity(pBlock, pOperator->resultInfo.capacity);
     while (1) {
       doBuildResultDatablock(pOperator, &pInfo->binfo, &pInfo->groupResInfo, pInfo->aggSup.pResultBuf);
-      doFilter(pInfo->pCondition, pBlock, NULL);
+      doFilter(pInfo->pCondition, pBlock, NULL, NULL);
 
       bool hasRemain = hasRemainResults(&pInfo->groupResInfo);
       if (!hasRemain) {
@@ -2019,7 +2019,7 @@ static SSDataBlock* doSessionWindowAgg(SOperatorInfo* pOperator) {
   if (pOperator->status == OP_RES_TO_RETURN) {
     while (1) {
       doBuildResultDatablock(pOperator, &pInfo->binfo, &pInfo->groupResInfo, pInfo->aggSup.pResultBuf);
-      doFilter(pInfo->pCondition, pBInfo->pRes, NULL);
+      doFilter(pInfo->pCondition, pBInfo->pRes, NULL, NULL);
 
       bool hasRemain = hasRemainResults(&pInfo->groupResInfo);
       if (!hasRemain) {
@@ -2062,7 +2062,7 @@ static SSDataBlock* doSessionWindowAgg(SOperatorInfo* pOperator) {
   blockDataEnsureCapacity(pBInfo->pRes, pOperator->resultInfo.capacity);
   while (1) {
     doBuildResultDatablock(pOperator, &pInfo->binfo, &pInfo->groupResInfo, pInfo->aggSup.pResultBuf);
-    doFilter(pInfo->pCondition, pBInfo->pRes, NULL);
+    doFilter(pInfo->pCondition, pBInfo->pRes, NULL, NULL);
 
     bool hasRemain = hasRemainResults(&pInfo->groupResInfo);
     if (!hasRemain) {
@@ -5251,7 +5251,7 @@ static void doMergeAlignedIntervalAgg(SOperatorInfo* pOperator) {
     setInputDataBlock(pOperator, pSup->pCtx, pBlock, pIaInfo->inputOrder, scanFlag, true);
     doMergeAlignedIntervalAggImpl(pOperator, &pIaInfo->binfo.resultRowInfo, pBlock, pRes);
 
-    doFilter(pMiaInfo->pCondition, pRes, NULL);
+    doFilter(pMiaInfo->pCondition, pRes, NULL, NULL);
     if (pRes->info.rows >= pOperator->resultInfo.capacity) {
       break;
     }
diff --git a/source/libs/qworker/inc/qwInt.h b/source/libs/qworker/inc/qwInt.h
index 626e78b4d3..36c6817595 100644
--- a/source/libs/qworker/inc/qwInt.h
+++ b/source/libs/qworker/inc/qwInt.h
@@ -123,6 +123,7 @@ typedef struct SQWTaskCtx {
   int32_t  execId;
   int32_t  level;
 
+  bool    queryGotData;
   bool    queryRsped;
   bool    queryEnd;
   bool    queryContinue;
diff --git a/source/libs/qworker/src/qworker.c b/source/libs/qworker/src/qworker.c
index 9115c2d3aa..d2c16a1cb5 100644
--- a/source/libs/qworker/src/qworker.c
+++ b/source/libs/qworker/src/qworker.c
@@ -10,6 +10,7 @@
 #include "tdatablock.h"
 #include "tmsg.h"
 #include "tname.h"
+#include "tglobal.h"
 
 SQWorkerMgmt gQwMgmt = {
     .lock = 0,
@@ -92,6 +93,19 @@ int32_t qwHandleTaskComplete(QW_FPARAMS_DEF, SQWTaskCtx *ctx) {
   return TSDB_CODE_SUCCESS;
 }
 
+int32_t qwSendQueryRsp(QW_FPARAMS_DEF, int32_t msgType, SQWTaskCtx *ctx, int32_t rspCode, bool quickRsp) {
+  if ((!quickRsp) || QUERY_RSP_POLICY_QUICK == tsQueryRspPolicy) {
+    if (!ctx->localExec) {
+      qwBuildAndSendQueryRsp(msgType, &ctx->ctrlConnInfo, rspCode, ctx);
+      QW_TASK_DLOG("query msg rsped, handle:%p, code:%x - %s", ctx->ctrlConnInfo.handle, rspCode, tstrerror(rspCode));
+    }
+
+    ctx->queryRsped = true;
+  }
+
+  return TSDB_CODE_SUCCESS;
+}
+
 int32_t qwExecTask(QW_FPARAMS_DEF, SQWTaskCtx *ctx, bool *queryStop) {
   int32_t        code = 0;
   bool           qcontinue = true;
@@ -144,7 +158,7 @@ int32_t qwExecTask(QW_FPARAMS_DEF, SQWTaskCtx *ctx, bool *queryStop) {
       if (numOfResBlock == 0) {
         QW_TASK_DLOG("qExecTask end with empty res, useconds:%" PRIu64, useconds);
       } else {
-        QW_TASK_DLOG("qExecTask done", "");
+        QW_TASK_DLOG("qExecTask done, useconds:%" PRIu64, useconds);
       }
 
       dsEndPut(sinkHandle, useconds);
@@ -234,6 +248,10 @@ int32_t qwGetQueryResFromSink(QW_FPARAMS_DEF, SQWTaskCtx *ctx, int32_t *dataLen,
   int32_t            code = 0;
   SOutputData        output = {0};
 
+  if (NULL == ctx->sinkHandle) {
+    return TSDB_CODE_SUCCESS;
+  }
+
   *dataLen = 0;
 
   while (true) {
@@ -407,6 +425,11 @@ int32_t qwHandlePrePhaseEvents(QW_FPARAMS_DEF, int8_t phase, SQWPhaseInput *inpu
         QW_ERR_JRET(TSDB_CODE_QRY_DUPLICATTED_OPERATION);
       }
 
+      if (ctx->rspCode) {
+        QW_TASK_ELOG("task already failed cause of %s, phase:%s", tstrerror(ctx->rspCode), qwPhaseStr(phase));
+        QW_ERR_JRET(ctx->rspCode);
+      }
+
       if (!ctx->queryRsped) {
         QW_TASK_ELOG("ready msg has not been processed, phase:%s", qwPhaseStr(phase));
         QW_ERR_JRET(TSDB_CODE_QRY_TASK_MSG_ERROR);
@@ -419,6 +442,11 @@ int32_t qwHandlePrePhaseEvents(QW_FPARAMS_DEF, int8_t phase, SQWPhaseInput *inpu
         QW_ERR_JRET(TSDB_CODE_QRY_TASK_DROPPED);
       }
 
+      if (ctx->rspCode) {
+        QW_TASK_ELOG("task already failed cause of %s, phase:%s", tstrerror(ctx->rspCode), qwPhaseStr(phase));
+        QW_ERR_JRET(ctx->rspCode);
+      }
+
       if (QW_EVENT_RECEIVED(ctx, QW_EVENT_DROP)) {
         QW_ERR_JRET(qwDropTask(QW_FPARAMS()));
 
@@ -499,21 +527,17 @@ _return:
 
   if (TSDB_CODE_SUCCESS == code && QW_PHASE_POST_QUERY == phase) {
     qwUpdateTaskStatus(QW_FPARAMS(), JOB_TASK_STATUS_PART_SUCC);
+    ctx->queryGotData = true;
   }
 
-  if (QW_PHASE_POST_QUERY == phase && ctx) {
-    if (!ctx->localExec) {
-      bool   rsped = false;
-      SQWMsg qwMsg = {.msgType = ctx->msgType, .connInfo = ctx->ctrlConnInfo};
-      qwDbgSimulateRedirect(&qwMsg, ctx, &rsped);
-      qwDbgSimulateDead(QW_FPARAMS(), ctx, &rsped);
-      if (!rsped) {
-        qwBuildAndSendQueryRsp(input->msgType + 1, &ctx->ctrlConnInfo, code, ctx);
-        QW_TASK_DLOG("query msg rsped, handle:%p, code:%x - %s", ctx->ctrlConnInfo.handle, code, tstrerror(code));
-      }
+  if (QW_PHASE_POST_QUERY == phase && ctx && !ctx->queryRsped) {
+    bool   rsped = false;
+    SQWMsg qwMsg = {.msgType = ctx->msgType, .connInfo = ctx->ctrlConnInfo};
+    qwDbgSimulateRedirect(&qwMsg, ctx, &rsped);
+    qwDbgSimulateDead(QW_FPARAMS(), ctx, &rsped);
+    if (!rsped) {      
+      qwSendQueryRsp(QW_FPARAMS(), input->msgType + 1, ctx, code, false);
     }
-
-    ctx->queryRsped = true;
   }
 
   if (ctx) {
@@ -551,6 +575,7 @@ int32_t qwPreprocessQuery(QW_FPARAMS_DEF, SQWMsg *qwMsg) {
   QW_ERR_JRET(qwAcquireTaskCtx(QW_FPARAMS(), &ctx));
 
   ctx->ctrlConnInfo = qwMsg->connInfo;
+  ctx->phase = -1;
 
   QW_ERR_JRET(qwAddTaskStatus(QW_FPARAMS(), JOB_TASK_STATUS_INIT));
 
@@ -604,6 +629,8 @@ int32_t qwProcessQuery(QW_FPARAMS_DEF, SQWMsg *qwMsg, char *sql) {
     QW_ERR_JRET(TSDB_CODE_QRY_APP_ERROR);
   }
 
+  qwSendQueryRsp(QW_FPARAMS(), qwMsg->msgType + 1, ctx, code, true);
+
   ctx->level = plan->level;
   atomic_store_ptr(&ctx->taskHandle, pTaskInfo);
   atomic_store_ptr(&ctx->sinkHandle, sinkHandle);
@@ -619,6 +646,31 @@ _return:
   input.msgType = qwMsg->msgType;
   code = qwHandlePostPhaseEvents(QW_FPARAMS(), QW_PHASE_POST_QUERY, &input, NULL);
 
+  if (ctx != NULL && QW_EVENT_RECEIVED(ctx, QW_EVENT_FETCH)) {
+    void         *rsp = NULL;
+    int32_t       dataLen = 0;
+    SOutputData sOutput = {0};
+    QW_ERR_JRET(qwGetQueryResFromSink(QW_FPARAMS(), ctx, &dataLen, &rsp, &sOutput));
+
+    if (rsp) {
+      bool qComplete = (DS_BUF_EMPTY == sOutput.bufStatus && sOutput.queryEnd);
+
+      qwBuildFetchRsp(rsp, &sOutput, dataLen, qComplete);
+      if (qComplete) {
+        atomic_store_8((int8_t *)&ctx->queryEnd, true);
+      }
+
+      qwMsg->connInfo = ctx->dataConnInfo;
+      QW_SET_EVENT_PROCESSED(ctx, QW_EVENT_FETCH);
+
+      qwBuildAndSendFetchRsp(ctx->fetchType, &qwMsg->connInfo, rsp, dataLen, code);
+      rsp = NULL;
+
+      QW_TASK_DLOG("fetch rsp send, handle:%p, code:%x - %s, dataLen:%d", qwMsg->connInfo.handle, code,
+                   tstrerror(code), dataLen);
+    }
+  }
+
   QW_RET(TSDB_CODE_SUCCESS);
 }
 
@@ -740,7 +792,9 @@ int32_t qwProcessFetch(QW_FPARAMS_DEF, SQWMsg *qwMsg) {
     locked = true;
 
     // RC WARNING
-    if (QW_QUERY_RUNNING(ctx)) {
+    if (-1 == ctx->phase || false == ctx->queryGotData) {
+      QW_TASK_DLOG_E("task query unfinished");
+    } else if (QW_QUERY_RUNNING(ctx)) {
       atomic_store_8((int8_t *)&ctx->queryContinue, 1);
     } else if (0 == atomic_load_8((int8_t *)&ctx->queryInQueue)) {
       qwUpdateTaskStatus(QW_FPARAMS(), JOB_TASK_STATUS_EXEC);
diff --git a/source/libs/scheduler/src/schTask.c b/source/libs/scheduler/src/schTask.c
index 2678a652a9..33bf50d853 100644
--- a/source/libs/scheduler/src/schTask.c
+++ b/source/libs/scheduler/src/schTask.c
@@ -913,7 +913,7 @@ int32_t schLaunchRemoteTask(SSchJob *pJob, SSchTask *pTask) {
   SCH_ERR_RET(schSetTaskCandidateAddrs(pJob, pTask));
 
   if (SCH_IS_QUERY_JOB(pJob)) {
-    SCH_ERR_RET(schEnsureHbConnection(pJob, pTask));
+//    SCH_ERR_RET(schEnsureHbConnection(pJob, pTask));
   }
 
   SCH_RET(schBuildAndSendMsg(pJob, pTask, NULL, plan->msgType));
@@ -993,6 +993,12 @@ int32_t schLaunchTaskImpl(void *param) {
     SCH_ERR_JRET(schLaunchRemoteTask(pJob, pTask));
   }
 
+#if 0
+  if (SCH_IS_QUERY_JOB(pJob)) {
+    SCH_ERR_JRET(schEnsureHbConnection(pJob, pTask));
+  }
+#endif
+
 _return:
 
   if (pJob->taskNum >= SCH_MIN_AYSNC_EXEC_NUM) {
diff --git a/source/libs/scheduler/src/scheduler.c b/source/libs/scheduler/src/scheduler.c
index 813a11c056..c4b45649a4 100644
--- a/source/libs/scheduler/src/scheduler.c
+++ b/source/libs/scheduler/src/scheduler.c
@@ -155,8 +155,7 @@ void schedulerFreeJob(int64_t *jobId, int32_t errCode) {
     return;
   }
 
-  SCH_JOB_DLOG("start to free job 0x%" PRIx64 ", errCode:0x%x", *jobId, errCode);
-
+  SCH_JOB_DLOG("start to free job 0x%" PRIx64 ", code:%s", *jobId, tstrerror(errCode));
   schHandleJobDrop(pJob, errCode);
 
   schReleaseJob(*jobId);
diff --git a/source/libs/transport/src/transCli.c b/source/libs/transport/src/transCli.c
index 83323725be..359b9824cf 100644
--- a/source/libs/transport/src/transCli.c
+++ b/source/libs/transport/src/transCli.c
@@ -597,6 +597,7 @@ static int32_t specifyConnRef(SCliConn* conn, bool update, int64_t handle) {
 static void cliAllocRecvBufferCb(uv_handle_t* handle, size_t suggested_size, uv_buf_t* buf) {
   SCliConn*    conn = handle->data;
   SConnBuffer* pBuf = &conn->readBuf;
+  tDebug("%s conn %p alloc read buf", CONN_GET_INST_LABEL(conn), conn);
   transAllocBuffer(pBuf, buf);
 }
 static void cliRecvCb(uv_stream_t* handle, ssize_t nread, const uv_buf_t* buf) {
@@ -609,7 +610,7 @@ static void cliRecvCb(uv_stream_t* handle, ssize_t nread, const uv_buf_t* buf) {
   if (nread > 0) {
     pBuf->len += nread;
     while (transReadComplete(pBuf)) {
-      tTrace("%s conn %p read complete", CONN_GET_INST_LABEL(conn), conn);
+      tDebug("%s conn %p read complete", CONN_GET_INST_LABEL(conn), conn);
       if (pBuf->invalid) {
         cliHandleExcept(conn);
         break;
diff --git a/source/libs/transport/src/transComm.c b/source/libs/transport/src/transComm.c
index 42079ff005..f843c8559c 100644
--- a/source/libs/transport/src/transComm.c
+++ b/source/libs/transport/src/transComm.c
@@ -203,7 +203,7 @@ bool transReadComplete(SConnBuffer* connBuf) {
 }
 
 int transSetConnOption(uv_tcp_t* stream) {
-  uv_tcp_nodelay(stream, 1);
+  uv_tcp_nodelay(stream, 0);
   int ret = uv_tcp_keepalive(stream, 5, 60);
   return ret;
 }
diff --git a/source/libs/transport/src/transSvr.c b/source/libs/transport/src/transSvr.c
index 57bf8a34b3..3616b4808f 100644
--- a/source/libs/transport/src/transSvr.c
+++ b/source/libs/transport/src/transSvr.c
@@ -332,7 +332,10 @@ void uvOnSendCb(uv_write_t* req, int status) {
   if (status == 0) {
     tTrace("conn %p data already was written on stream", conn);
     if (!transQueueEmpty(&conn->srvMsgs)) {
-      SSvrMsg* msg = transQueuePop(&conn->srvMsgs);
+      SSvrMsg*  msg = transQueuePop(&conn->srvMsgs);
+      STraceId* trace = &msg->msg.info.traceId;
+      tGDebug("conn %p write data out", conn);
+
       destroySmsg(msg);
       // send cached data
       if (!transQueueEmpty(&conn->srvMsgs)) {