diff --git a/docs/en/05-get-started/01-docker.md b/docs/en/05-get-started/01-docker.md
index 32eee6b942..de5b620a77 100644
--- a/docs/en/05-get-started/01-docker.md
+++ b/docs/en/05-get-started/01-docker.md
@@ -42,7 +42,7 @@ To do so, run the following command:
    
    ```
 
-   This command creates the `meters` supertable in the `test` database. In the `meters` supertable, it then creates 10,000 subtables named `d0` to `d9999`. Each table has 10,000 rows and each row has four columns: `ts`, `current`, `voltage`, and `phase`. The timestamps of the data in these columns range from 2017-07-14 10:40:00 000 to 2017-07-14 10:40:09 999. Each table is randomly assigned a `groupId` tag from 1 to ten and a `location` tag of either `California.SanFrancisco` or `California.SanDiego`.
+This command creates the `meters` supertable in the `test` database. In the `meters` supertable, it then creates 10,000 subtables named `d0` to `d9999`. Each table has 10,000 rows and each row has four columns: `ts`, `current`, `voltage`, and `phase`. The timestamps of the data in these columns range from 2017-07-14 10:40:00 000 to 2017-07-14 10:40:09 999. Each table is randomly assigned a `groupId` tag from 1 to 10 and a `location` tag of either `Campbell`, `Cupertino`, `Los Angeles`, `Mountain View`, `Palo Alto`, `San Diego`, `San Francisco`, `San Jose`, `Santa Clara` or `Sunnyvale`.
 
    The `taosBenchmark` command creates a deployment with 100 million data points that you can use for testing purposes. The time required depends on the hardware specifications of the local system.
 
diff --git a/source/client/inc/clientInt.h b/source/client/inc/clientInt.h
index f275ae0885..855dfb15ee 100644
--- a/source/client/inc/clientInt.h
+++ b/source/client/inc/clientInt.h
@@ -96,7 +96,12 @@ typedef struct {
 
 typedef struct SQueryExecMetric {
   int64_t start;   // start timestamp, us
-  int64_t parsed;  // start to parse, us
+  int64_t syntaxStart;  // start to parse, us
+  int64_t syntaxEnd;  // end to parse, us
+  int64_t ctgStart;  // start to parse, us
+  int64_t ctgEnd;  // end to parse, us
+  int64_t semanticEnd;
+  int64_t execEnd;
   int64_t send;    // start to send to server, us
   int64_t rsp;     // receive response from server, us
 } SQueryExecMetric;
diff --git a/source/client/inc/clientLog.h b/source/client/inc/clientLog.h
index d47edcd795..ec0a41a68f 100644
--- a/source/client/inc/clientLog.h
+++ b/source/client/inc/clientLog.h
@@ -29,6 +29,7 @@ extern "C" {
 #define tscDebug(...)  do { if (cDebugFlag & DEBUG_DEBUG) { taosPrintLog("TSC ", DEBUG_DEBUG, cDebugFlag, __VA_ARGS__); }} while(0)
 #define tscTrace(...)  do { if (cDebugFlag & DEBUG_TRACE) { taosPrintLog("TSC ", DEBUG_TRACE, cDebugFlag, __VA_ARGS__); }} while(0)
 #define tscDebugL(...) do { if (cDebugFlag & DEBUG_DEBUG) { taosPrintLongString("TSC ", DEBUG_DEBUG, cDebugFlag, __VA_ARGS__); }} while(0)
+#define tscPerf(...)   do { taosPrintLog("TSC ", 0, cDebugFlag, __VA_ARGS__); } while(0)
 
 #ifdef __cplusplus
 }
diff --git a/source/client/src/clientEnv.c b/source/client/src/clientEnv.c
index ff1b9322c9..ae92d2dc7c 100644
--- a/source/client/src/clientEnv.c
+++ b/source/client/src/clientEnv.c
@@ -69,14 +69,25 @@ static void deregisterRequest(SRequestObj *pRequest) {
   int32_t currentInst = atomic_sub_fetch_64((int64_t *)&pActivity->currentRequests, 1);
   int32_t num = atomic_sub_fetch_32(&pTscObj->numOfReqs, 1);
 
-  int64_t duration = taosGetTimestampUs() - pRequest->metric.start;
+  int64_t nowUs = taosGetTimestampUs();
+  int64_t duration = nowUs - pRequest->metric.start;
   tscDebug("0x%" PRIx64 " free Request from connObj: 0x%" PRIx64 ", reqId:0x%" PRIx64 " elapsed:%" PRIu64
            " ms, current:%d, app current:%d",
            pRequest->self, pTscObj->id, pRequest->requestId, duration / 1000, num, currentInst);
 
   if (QUERY_NODE_VNODE_MODIF_STMT == pRequest->stmtType) {
+    tscPerf("insert duration %" PRId64 "us: syntax:%" PRId64 "us, ctg:%" PRId64 "us, semantic:%" PRId64 "us, exec:%" PRId64 "us", 
+            duration, pRequest->metric.syntaxEnd - pRequest->metric.syntaxStart, 
+            pRequest->metric.ctgEnd - pRequest->metric.ctgStart,
+            pRequest->metric.semanticEnd - pRequest->metric.ctgEnd,
+            pRequest->metric.execEnd - pRequest->metric.semanticEnd);
     atomic_add_fetch_64((int64_t *)&pActivity->insertElapsedTime, duration);
   } else if (QUERY_NODE_SELECT_STMT == pRequest->stmtType) {
+    tscPerf("select duration %" PRId64 "us: syntax:%" PRId64 "us, ctg:%" PRId64 "us, semantic:%" PRId64 "us, exec:%" PRId64 "us", 
+            duration, pRequest->metric.syntaxEnd - pRequest->metric.syntaxStart, 
+            pRequest->metric.ctgEnd - pRequest->metric.ctgStart,
+            pRequest->metric.semanticEnd - pRequest->metric.ctgEnd,
+            pRequest->metric.execEnd - pRequest->metric.semanticEnd);
     atomic_add_fetch_64((int64_t *)&pActivity->queryElapsedTime, duration);
   }
 
@@ -330,7 +341,6 @@ void doDestroyRequest(void *p) {
   schedulerFreeJob(&pRequest->body.queryJob, 0);
 
   taosMemoryFreeClear(pRequest->msgBuf);
-  taosMemoryFreeClear(pRequest->sqlstr);
   taosMemoryFreeClear(pRequest->pDb);
 
   doFreeReqResultInfo(&pRequest->body.resInfo);
@@ -349,6 +359,7 @@ void doDestroyRequest(void *p) {
     taosMemoryFree(pRequest->body.param);
   }
 
+  taosMemoryFreeClear(pRequest->sqlstr);
   taosMemoryFree(pRequest);
   tscTrace("end to destroy request %" PRIx64 " p:%p", reqId, pRequest);
 }
diff --git a/source/client/src/clientImpl.c b/source/client/src/clientImpl.c
index 5f0af55d13..998b9cee5c 100644
--- a/source/client/src/clientImpl.c
+++ b/source/client/src/clientImpl.c
@@ -842,6 +842,8 @@ void schedulerExecCb(SExecResult* pResult, void* param, int32_t code) {
     }
 
     schedulerFreeJob(&pRequest->body.queryJob, 0);
+
+    pRequest->metric.execEnd = taosGetTimestampUs();
   }
 
   taosMemoryFree(pResult);
diff --git a/source/client/src/clientMain.c b/source/client/src/clientMain.c
index f449641f10..31ae443d5b 100644
--- a/source/client/src/clientMain.c
+++ b/source/client/src/clientMain.c
@@ -685,6 +685,8 @@ void retrieveMetaCallback(SMetaData *pResultMeta, void *param, int32_t code) {
   SQuery          *pQuery = pWrapper->pQuery;
   SRequestObj     *pRequest = pWrapper->pRequest;
 
+  pRequest->metric.ctgEnd = taosGetTimestampUs();
+
   if (code == TSDB_CODE_SUCCESS) {
     code = qAnalyseSqlSemantic(pWrapper->pCtx, &pWrapper->catalogReq, pResultMeta, pQuery);
     pRequest->stableQuery = pQuery->stableQuery;
@@ -693,6 +695,8 @@ void retrieveMetaCallback(SMetaData *pResultMeta, void *param, int32_t code) {
     }
   }
 
+  pRequest->metric.semanticEnd = taosGetTimestampUs();
+
   if (code == TSDB_CODE_SUCCESS) {
     if (pQuery->haveResultSet) {
       setResSchemaInfo(&pRequest->body.resInfo, pQuery->pResSchema, pQuery->numOfResCols);
@@ -784,12 +788,16 @@ void doAsyncQuery(SRequestObj *pRequest, bool updateMetaForce) {
 
   SQuery *pQuery = NULL;
 
+  pRequest->metric.syntaxStart = taosGetTimestampUs();
+
   SCatalogReq catalogReq = {.forceUpdate = updateMetaForce, .qNodeRequired = qnodeRequired(pRequest)};
   code = qParseSqlSyntax(pCxt, &pQuery, &catalogReq);
   if (code != TSDB_CODE_SUCCESS) {
     goto _error;
   }
 
+  pRequest->metric.syntaxEnd = taosGetTimestampUs();
+
   if (!updateMetaForce) {
     STscObj            *pTscObj = pRequest->pTscObj;
     SAppClusterSummary *pActivity = &pTscObj->pAppInfo->summary;
@@ -816,6 +824,8 @@ void doAsyncQuery(SRequestObj *pRequest, bool updateMetaForce) {
                            .requestObjRefId = pCxt->requestRid,
                            .mgmtEps = pCxt->mgmtEpSet};
 
+  pRequest->metric.ctgStart = taosGetTimestampUs();
+
   code = catalogAsyncGetAllMeta(pCxt->pCatalog, &conn, &catalogReq, retrieveMetaCallback, pWrapper,
                                 &pRequest->body.queryJob);
   pCxt = NULL;
diff --git a/source/dnode/vnode/src/tsdb/tsdbRead.c b/source/dnode/vnode/src/tsdb/tsdbRead.c
index cb288cecfb..0b027367da 100644
--- a/source/dnode/vnode/src/tsdb/tsdbRead.c
+++ b/source/dnode/vnode/src/tsdb/tsdbRead.c
@@ -1416,7 +1416,7 @@ static int32_t doMergeBufAndFileRows_Rv(STsdbReader* pReader, STableBlockScanInf
   int64_t minKey = 0;
   if (pReader->order == TSDB_ORDER_ASC) {
     minKey = INT64_MAX;   // chosen the minimum value
-    if (minKey > tsLast && pLastBlockReader->lastBlockData.nRow > 0) {
+    if (minKey > tsLast && hasDataInLastBlock(pLastBlockReader)) {
       minKey = tsLast;
     }
 
@@ -1429,7 +1429,7 @@ static int32_t doMergeBufAndFileRows_Rv(STsdbReader* pReader, STableBlockScanInf
     }
   } else {
     minKey = INT64_MIN;
-    if (minKey < tsLast && pLastBlockReader->lastBlockData.nRow > 0) {
+    if (minKey < tsLast && hasDataInLastBlock(pLastBlockReader)) {
       minKey = tsLast;
     }
 
diff --git a/source/libs/executor/src/executil.c b/source/libs/executor/src/executil.c
index 4c694026cb..197d94dcf4 100644
--- a/source/libs/executor/src/executil.c
+++ b/source/libs/executor/src/executil.c
@@ -469,6 +469,7 @@ static SColumnInfoData* getColInfoResult(void* metaHandle, uint64_t suid, SArray
   SDataType type = {.type = TSDB_DATA_TYPE_BOOL, .bytes = sizeof(bool)};
   code = createResultData(&type, rows, &output);
   if (code != TSDB_CODE_SUCCESS) {
+    terrno = code;
     qError("failed to create result, reason:%s", tstrerror(code));
     goto end;
   }
@@ -477,6 +478,7 @@ static SColumnInfoData* getColInfoResult(void* metaHandle, uint64_t suid, SArray
   if(code != TSDB_CODE_SUCCESS){
     qError("failed to calculate scalar, reason:%s", tstrerror(code));
     terrno = code;
+    goto end;
   }
 //  int64_t st2 = taosGetTimestampUs();
 //  qDebug("calculate tag block rows:%d, cost:%ld us", rows, st2-st1);
@@ -763,6 +765,7 @@ int32_t getTableList(void* metaHandle, void* pVnode, SScanPhysiNode* pScanNode,
   }
 
   if (pTagCond) {
+    terrno = TDB_CODE_SUCCESS;
     SColumnInfoData* pColInfoData = getColInfoResult(metaHandle, pListInfo->suid, res, pTagCond);
     if(terrno != TDB_CODE_SUCCESS){
       colDataDestroy(pColInfoData);
diff --git a/source/libs/scheduler/inc/schInt.h b/source/libs/scheduler/inc/schInt.h
index ce841ed83c..957fd46ba5 100644
--- a/source/libs/scheduler/inc/schInt.h
+++ b/source/libs/scheduler/inc/schInt.h
@@ -283,7 +283,7 @@ typedef struct SSchJob {
 } SSchJob;
 
 typedef struct SSchTaskCtx {
-  SSchJob  *pJob;
+  int64_t  jobRid;
   SSchTask *pTask;
 } SSchTaskCtx;
 
diff --git a/source/libs/scheduler/src/schTask.c b/source/libs/scheduler/src/schTask.c
index d16d15c119..9cab39c301 100644
--- a/source/libs/scheduler/src/schTask.c
+++ b/source/libs/scheduler/src/schTask.c
@@ -821,7 +821,13 @@ int32_t schProcessOnTaskStatusRsp(SQueryNodeEpId *pEpId, SArray *pStatusList) {
 
 int32_t schLaunchTaskImpl(void *param) {
   SSchTaskCtx *pCtx = (SSchTaskCtx *)param;
-  SSchJob *pJob = pCtx->pJob;
+  SSchJob *pJob = schAcquireJob(pCtx->jobRid);
+  if (NULL == pJob) {
+    taosMemoryFree(param);
+    qDebug("job refId 0x%" PRIx64 " already not exist", pCtx->jobRid);
+    SCH_RET(TSDB_CODE_SCH_JOB_IS_DROPPING);
+  }
+  
   SSchTask *pTask = pCtx->pTask;
   int8_t  status = 0;
   int32_t code = 0;
@@ -880,6 +886,8 @@ _return:
     }
   }
 
+  schReleaseJob(pJob->refId);
+
   SCH_RET(code);
 }
 
@@ -890,7 +898,7 @@ int32_t schAsyncLaunchTaskImpl(SSchJob *pJob, SSchTask *pTask) {
     SCH_ERR_RET(TSDB_CODE_OUT_OF_MEMORY);
   }
   
-  param->pJob = pJob;
+  param->jobRid = pJob->refId;
   param->pTask = pTask;
 
   if (pJob->taskNum >= SCH_MIN_AYSNC_EXEC_NUM) {