diff --git a/example/insertNow.json b/example/insertNow.json
new file mode 100644
index 00000000..8032654d
--- /dev/null
+++ b/example/insertNow.json
@@ -0,0 +1,86 @@
+{
+    "filetype": "insert",
+    "cfgdir": "/etc/taos",
+    "host": "127.0.0.1",
+    "port": 6030,
+    "user": "root",
+    "password": "taosdata",
+    "connection_pool_size": 8,
+    "thread_count": 5,
+    "create_table_thread_count": 7,
+    "result_file": "./insert_res.txt",
+    "confirm_parameter_prompt": "no",
+    "insert_interval": 0,
+    "num_of_records_per_req": 2000,
+    "prepared_rand": 10000,
+    "chinese": "no",
+    "escape_character": "yes",
+    "databases": [
+        {
+            "dbinfo": {
+                "name": "smart",
+                "drop": "yes",
+                "vgroups": 4,
+                "duration": "10d",
+                "keep": "100d",
+                "pages": 512,
+                "minrows":5000,
+                "maxrows":10000,
+		        "stt_trigger":1,
+                "wal_retention_period": 10,
+                "wal_retention_size": 100,
+		        "cachemodel": "'both'",
+                "precision": "ms"
+            },
+            "super_tables": [
+                {
+                    "name": "meters",
+                    "child_table_exists": "no",
+                    "childtable_count": 10000,
+                    "childtable_prefix": "d",
+                    "auto_create_table": "no",
+                    "batch_create_tbl_num": 5,
+                    "data_source": "rand",
+                    "insert_mode": "taosc",
+                    "non_stop_mode": "no",
+                    "line_protocol": "line",
+                    "insert_rows": 900000000000000,
+                    "interlace_rows": 1,
+                    "insert_interval": 1000,
+                    "start_timestamp": "now",
+                    "sample_format": "csv",
+                    "sample_file": "./sample.csv",
+                    "use_sample_ts": "no",
+                    "tags_file": "",
+                    "columns": [
+                        {
+                            "type": "FLOAT",
+                            "name": "current",
+                            "count": 1,
+                            "max": 12,
+                            "min": 8
+                        },
+                        { "type": "INT", "name": "voltage", "max": 225, "min": 215 },
+                        { "type": "FLOAT", "name": "phase", "max": 1, "min": 0 }
+                    ],
+                    "tags": [
+                        {
+                            "type": "TINYINT",
+                            "name": "groupid",
+                            "max": 10,
+                            "min": 1
+                        },
+                        {
+                            "name": "location",
+                            "type": "BINARY",
+                            "len": 16,
+                            "values": ["San Francisco", "Los Angles", "San Diego",
+                                "San Jose", "Palo Alto", "Campbell", "Mountain View",
+                                "Sunnyvale", "Santa Clara", "Cupertino"]
+                        }
+                    ]
+                }
+            ]
+        }
+    ]
+}
diff --git a/src/benchInsert.c b/src/benchInsert.c
index 51fd3431..bad5e85c 100644
--- a/src/benchInsert.c
+++ b/src/benchInsert.c
@@ -1532,8 +1532,12 @@ static void *syncWriteInterlace(void *sarg) {
                         int64_t disorderTs = getDisorderTs(stbInfo,
                                 &disorderRange);
                         char time_string[BIGINT_BUFF_LEN];
-                        snprintf(time_string, BIGINT_BUFF_LEN, "%"PRId64"",
-                                disorderTs?disorderTs:timestamp);
+                        if(stbInfo->useNow) {
+                            snprintf(time_string, BIGINT_BUFF_LEN, "now");
+                        } else {
+                            snprintf(time_string, BIGINT_BUFF_LEN, "%"PRId64"",
+                                    disorderTs?disorderTs:timestamp);
+                        }
                         ds_add_strs(&pThreadInfo->buffer, 5,
                                     "(",
                                     time_string,
diff --git a/src/benchJsonOpt.c b/src/benchJsonOpt.c
index 535d960b..dfc60352 100644
--- a/src/benchJsonOpt.c
+++ b/src/benchJsonOpt.c
@@ -889,6 +889,11 @@ static int getStableInfo(tools_cJSON *dbinfos, int index) {
             superTable->interlaceRows = (uint32_t)stbInterlaceRows->valueint;
         }
 
+        // force set 
+        if(superTable->useNow) {
+            superTable->interlaceRows = 1;
+        }
+
         // disorder
         tools_cJSON *disorderRatio =
             tools_cJSON_GetObjectItem(stbInfo, "disorder_ratio");