diff --git a/src/kit/taosdemo/taosdemo.c b/src/kit/taosdemo/taosdemo.c
index a94a4f73abf1df85093e309290193b0edb03570c..014acb5fbf7ed5425b8086d2a9a07ea9724dec49 100644
--- a/src/kit/taosdemo/taosdemo.c
+++ b/src/kit/taosdemo/taosdemo.c
@@ -232,7 +232,8 @@ typedef struct SSuperTable_S {
   int          disorderRatio;            // 0: no disorder, >0: x%
   int          disorderRange;            // ms or us by database precision
   int          maxSqlLen;                // 
-  
+
+  int          insertInterval;          // insert interval, will override global insert interval
   int64_t      insertRows;               // 0: no limit
   int          timeStampStep;
   char         startTimestamp[MAX_TB_NAME_SIZE];  // 
@@ -478,8 +479,8 @@ char *aggreFunc[] = {"*", "count(*)", "avg(col0)", "sum(col0)",
     "max(col0)", "min(col0)", "first(col0)", "last(col0)"};
 
 SArguments g_args = {
-    NULL,                             // metaFile
-    0,                              // test_mode
+                     NULL,            // metaFile
+                     0,               // test_mode
                      "127.0.0.1",     // host
                      6030,            // port
                      "root",          // user
@@ -743,7 +744,8 @@ void parse_args(int argc, char *argv[], SArguments *arguments) {
     }
   }
 
-  if (arguments->debug_print || arguments->verbose_print) {
+  if (((arguments->debug_print) && (arguments->metaFile == NULL))
+          || arguments->verbose_print) {
     printf("###################################################################\n");
     printf("# meta file:                         %s\n", arguments->metaFile);
     printf("# Server IP:                         %s:%hu\n", 
@@ -1263,6 +1265,7 @@ static void printfInsertMetaToFile(FILE* fp) {
       fprintf(fp, "      dataSource:        %s\n",  g_Dbs.db[i].superTbls[j].dataSource);      
       fprintf(fp, "      insertMode:        %s\n",  g_Dbs.db[i].superTbls[j].insertMode);      
       fprintf(fp, "      insertRows:        %"PRId64"\n", g_Dbs.db[i].superTbls[j].insertRows); 
+      fprintf(fp, "      insert interval:   %d\n", g_Dbs.db[i].superTbls[j].insertInterval);
 
       if (0 == g_Dbs.db[i].superTbls[j].multiThreadWriteOneTbl) {
         fprintf(fp, "      multiThreadWriteOneTbl:  no\n");     
@@ -2913,13 +2916,13 @@ static bool getMetaFromInsertJsonFile(cJSON* root) {
     goto PARSE_OVER;
   } 
 
-      cJSON* insertInterval = cJSON_GetObjectItem(root, "insert_interval");
-      if (insertInterval && insertInterval->type == cJSON_Number) {
-        g_args.insert_interval = insertInterval->valueint;
-      } else if (!insertInterval) {
+      cJSON* gInsertInterval = cJSON_GetObjectItem(root, "insert_interval");
+      if (gInsertInterval && gInsertInterval->type == cJSON_Number) {
+        g_args.insert_interval = gInsertInterval->valueint;
+      } else if (!gInsertInterval) {
         g_args.insert_interval = 0;
       } else {
-        printf("ERROR: failed to read json, insert_interval not found\n");
+        fprintf(stderr, "ERROR: failed to read json, insert_interval input mistake\n");
         goto PARSE_OVER;
       }
  
@@ -3438,13 +3441,22 @@ static bool getMetaFromInsertJsonFile(cJSON* root) {
       cJSON* insertRows = cJSON_GetObjectItem(stbInfo, "insert_rows");
       if (insertRows && insertRows->type == cJSON_Number) {
         g_Dbs.db[i].superTbls[j].insertRows = insertRows->valueint;
-        //if (0 == g_Dbs.db[i].superTbls[j].insertRows) {
-        //  g_Dbs.db[i].superTbls[j].insertRows = 0x7FFFFFFFFFFFFFFF;
-        //}
       } else if (!insertRows) {
         g_Dbs.db[i].superTbls[j].insertRows = 0x7FFFFFFFFFFFFFFF;
       } else {
-        printf("ERROR: failed to read json, insert_rows not found\n");
+        fprintf(stderr, "failed to read json, insert_rows input mistake");
+        goto PARSE_OVER;
+      }
+
+      cJSON* insertInterval = cJSON_GetObjectItem(stbInfo, "insert_interval");
+      if (insertInterval && insertInterval->type == cJSON_Number) {
+        g_Dbs.db[i].superTbls[j].insertInterval = insertInterval->valueint;
+      } else if (!insertInterval) {
+        debugPrint("%s() LN%d: stable insert interval be overrided by global %d.\n",
+                __func__, __LINE__, g_args.insert_interval);
+        g_Dbs.db[i].superTbls[j].insertInterval = g_args.insert_interval;
+      } else {
+        fprintf(stderr, "failed to read json, insert_interval input mistake");
         goto PARSE_OVER;
       }
 
@@ -3993,8 +4005,9 @@ static void syncWriteForNumberOfTblInOneSql(
   uint64_t time_counter = winfo->start_time;
   int sampleUsePos;
 
+  int insert_interval = superTblInfo?superTblInfo->insertInterval:g_args.insert_interval;
   int64_t st = 0;
-  int64_t et = 0;
+  int64_t et = 0xffffffff;
   for (int i = 0; i < superTblInfo->insertRows;) {
     int32_t  tbl_id = 0;
     for (int tID = winfo->start_table_id; tID <= winfo->end_table_id; ) {
@@ -4131,14 +4144,14 @@ static void syncWriteForNumberOfTblInOneSql(
         inserted += superTblInfo->rowsPerTbl;
 
 send_to_server:
-        if (g_args.insert_interval && (g_args.insert_interval > (et - st))) {
-            int sleep_time = g_args.insert_interval - (et -st);
-            printf("sleep: %d ms specified by insert_interval\n", sleep_time);
-            taosMsleep(sleep_time); // ms
-        }
+        if (insert_interval) {
+            st = taosGetTimestampUs();
 
-        if (g_args.insert_interval) {
-            st = taosGetTimestampMs();
+          if (insert_interval > ((et - st)/1000)) {
+            int sleep_time = insert_interval - (et -st);
+            printf("sleep: %d ms insert interval\n", sleep_time);
+            taosMsleep(sleep_time); // ms
+          }
         }
 
         if (0 == strncasecmp(superTblInfo->insertMode, 
@@ -4189,8 +4202,8 @@ send_to_server:
             goto free_and_statistics;
           }
         }
-        if (g_args.insert_interval) {
-            et = taosGetTimestampMs();
+        if (insert_interval) {
+            et = taosGetTimestampUs();
         }
 
         break;
@@ -4347,8 +4360,9 @@ static void* syncWrite(void *sarg) {
     return NULL;
   }
 
+  int insert_interval = superTblInfo?superTblInfo->insertInterval:g_args.insert_interval;
   uint64_t st = 0;
-  uint64_t et = 0;
+  uint64_t et = 0xffffffff;
 
   winfo->totalRowsInserted = 0;
   winfo->totalAffectedRows = 0;
@@ -4371,6 +4385,10 @@ static void* syncWrite(void *sarg) {
 
       sampleUsePos = samplePos;
 
+      if (insert_interval) {
+        st = taosGetTimestampUs();
+      }
+
       memset(buffer, 0, superTblInfo?superTblInfo->maxSqlLen:g_args.max_sql_len);
 
       char *pstr = buffer;
@@ -4502,17 +4520,6 @@ static void* syncWrite(void *sarg) {
   
       winfo->totalRowsInserted += k;
 
-      if (g_args.insert_interval) {
-        st = taosGetTimestampMs();
-
-        if (i > 0 && g_args.insert_interval 
-            && (g_args.insert_interval > (et - st) )) {
-            int sleep_time = g_args.insert_interval - (et -st);
-            printf("sleep: %d ms for insert interval\n", sleep_time);
-            taosMsleep(sleep_time); // ms
-        }
-      }
-
       int64_t startTs = taosGetTimestampUs();
       int64_t endTs;
       int affectedRows;
@@ -4559,12 +4566,20 @@ static void* syncWrite(void *sarg) {
         lastPrintTime = currentPrintTime;
       }
 
-      if (g_args.insert_interval) {
-        et = taosGetTimestampMs();
-      }
-
       if (prepared >= insertRows)
         break;
+
+      if (insert_interval) {
+        et = taosGetTimestampUs();
+
+        printf("et: %ld ms st: %ld\n", et, st);
+        if (insert_interval > ((et - st)/1000) ) {
+            int sleep_time = insert_interval - (et -st)/1000;
+            printf("sleep: %d ms for insert interval\n", sleep_time);
+            taosMsleep(sleep_time); // ms
+        }
+      }
+
     }   // num_of_DPT
 
     if ((tID == winfo->end_table_id) && superTblInfo &&
@@ -4588,11 +4603,13 @@ free_and_statistics_2:
 
 void callBack(void *param, TAOS_RES *res, int code) {
   threadInfo* winfo = (threadInfo*)param; 
+  SSuperTable* superTblInfo = winfo->superTblInfo;
 
-  if (g_args.insert_interval) {
-    winfo->et = taosGetTimestampMs();
-    if (winfo->et - winfo->st < 1000) {
-      taosMsleep(1000 - (winfo->et - winfo->st)); // ms
+  int insert_interval = superTblInfo?superTblInfo->insertInterval:g_args.insert_interval;
+  if (insert_interval) {
+    winfo->et = taosGetTimestampUs();
+    if (((winfo->et - winfo->st)/1000) < insert_interval) {
+      taosMsleep(insert_interval - (winfo->et - winfo->st)/1000); // ms
     }
   }
   
@@ -4632,8 +4649,8 @@ void callBack(void *param, TAOS_RES *res, int code) {
     }
   }
   
-  if (g_args.insert_interval) {
-    winfo->st = taosGetTimestampMs();
+  if (insert_interval) {
+    winfo->st = taosGetTimestampUs();
   }
   taos_query_a(winfo->taos, buffer, callBack, winfo);
   free(buffer);
@@ -4644,13 +4661,15 @@ void callBack(void *param, TAOS_RES *res, int code) {
 
 void *asyncWrite(void *sarg) {
   threadInfo *winfo = (threadInfo *)sarg;
+  SSuperTable* superTblInfo = winfo->superTblInfo;
 
   winfo->st = 0;
   winfo->et = 0;
   winfo->lastTs = winfo->start_time;
   
-  if (g_args.insert_interval) {
-    winfo->st = taosGetTimestampMs();
+  int insert_interval = superTblInfo?superTblInfo->insertInterval:g_args.insert_interval;
+  if (insert_interval) {
+    winfo->st = taosGetTimestampUs();
   }
   taos_query_a(winfo->taos, "show databases", callBack, winfo);
 
@@ -5076,7 +5095,7 @@ void *superQueryProcess(void *sarg) {
       //printf("========sleep duration:%"PRId64 "========inserted rows:%d, table range:%d - %d\n", (1000 - (et - st)), i, winfo->start_table_id, winfo->end_table_id);
     }
 
-    st = taosGetTimestampMs();
+    st = taosGetTimestampUs();
     for (int i = 0; i < g_queryInfo.superQueryInfo.sqlCount; i++) {
       if (0 == strncasecmp(g_queryInfo.queryMode, "taosc", 5)) {          
         int64_t t1 = taosGetTimestampUs();
@@ -5102,7 +5121,7 @@ void *superQueryProcess(void *sarg) {
         }
       }   
     }
-    et = taosGetTimestampMs();
+    et = taosGetTimestampUs();
     printf("==thread[%"PRId64"] complete all sqls to specify tables once queries duration:%.6fs\n\n", 
             taosGetSelfPthreadId(), (double)(et - st)/1000.0);
   }
@@ -5142,7 +5161,7 @@ static void *subQueryProcess(void *sarg) {
       //printf("========sleep duration:%"PRId64 "========inserted rows:%d, table range:%d - %d\n", (1000 - (et - st)), i, winfo->start_table_id, winfo->end_table_id);
     }
 
-    st = taosGetTimestampMs();
+    st = taosGetTimestampUs();
     for (int i = winfo->start_table_id; i <= winfo->end_table_id; i++) {
       for (int j = 0; j < g_queryInfo.subQueryInfo.sqlCount; j++) {
         memset(sqlstr,0,sizeof(sqlstr));
@@ -5156,12 +5175,12 @@ static void *subQueryProcess(void *sarg) {
         selectAndGetResult(winfo->taos, sqlstr, tmpFile); 
       }
     }
-    et = taosGetTimestampMs();
+    et = taosGetTimestampUs();
     printf("####thread[%"PRId64"] complete all sqls to allocate all sub-tables[%d - %d] once queries duration:%.4fs\n\n", 
             taosGetSelfPthreadId(), 
             winfo->start_table_id, 
             winfo->end_table_id, 
-            (double)(et - st)/1000.0);
+            (double)(et - st)/1000000.0);
   }
   return NULL;
 }
diff --git a/tests/pytest/tools/taosdemoWithMetric.py b/tests/pytest/tools/taosdemoTestWithoutMetric.py
similarity index 100%
rename from tests/pytest/tools/taosdemoWithMetric.py
rename to tests/pytest/tools/taosdemoTestWithoutMetric.py