diff --git a/include/common/tname.h b/include/common/tname.h
index ffa4f8f253a57c5d9897a7cc0f1306998b2857a5..ae2dc32335d8e33692a3c05c773d539e31c8a669 100644
--- a/include/common/tname.h
+++ b/include/common/tname.h
@@ -17,6 +17,7 @@
 #define _TD_COMMON_NAME_H_
 
 #include "tdef.h"
+#include "tarray.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -62,6 +63,18 @@ int32_t tNameSetAcctId(SName* dst, int32_t acctId);
 
 bool tNameDBNameEqual(SName* left, SName* right);
 
+typedef struct {
+  // input
+  SArray         *tags;         // element is SSmlKV
+  const char     *sTableName;   // super table name
+  uint8_t        sTableNameLen; // the length of super table name
+
+  // output
+  char           *childTableName;   // must have size of TSDB_TABLE_NAME_LEN;
+  uint64_t       uid;               // child table uid, may be useful
+} RandTableName;
+
+void buildChildTableName(RandTableName *rName);
 
 #ifdef __cplusplus
 }
diff --git a/source/client/src/clientSml.c b/source/client/src/clientSml.c
index 2a0e85092b522dc8c2945405717db9c9aa6745c4..15d150086033e6044e0ee2a110579dbce26579fc 100644
--- a/source/client/src/clientSml.c
+++ b/source/client/src/clientSml.c
@@ -15,6 +15,7 @@
 #include "tcommon.h"
 #include "catalog.h"
 #include "clientInt.h"
+#include "tname.h"
 //=================================================================================================
 
 #define SPACE ' '
@@ -97,6 +98,21 @@ typedef struct {
   char      *buf;
 } SSmlMsgBuf;
 
+typedef struct {
+  int32_t code;
+  int32_t lineNum;
+
+  int32_t numOfSTables;
+  int32_t numOfCTables;
+  int32_t numOfCreateSTables;
+
+  int64_t parseTime;
+  int64_t schemaTime;
+  int64_t insertBindTime;
+  int64_t insertRpcTime;
+  int64_t endTime;
+} SSmlCostInfo;
+
 typedef struct {
   uint64_t          id;
 
@@ -114,6 +130,7 @@ typedef struct {
   SRequestObj       *pRequest;
   SQuery            *pQuery;
 
+  SSmlCostInfo      cost;
   int32_t           affectedRows;
   SSmlMsgBuf        msgBuf;
   SHashObj          *dumplicateKey;  // for dumplicate key
@@ -147,45 +164,6 @@ static int32_t smlBuildInvalidDataMsg(SSmlMsgBuf* pBuf, const char *msg1, const
   return TSDB_CODE_SML_INVALID_DATA;
 }
 
-static int smlCompareKv(const void* p1, const void* p2) {
-  SSmlKv* kv1 = *(SSmlKv**)p1;
-  SSmlKv* kv2 = *(SSmlKv**)p2;
-  int32_t kvLen1 = kv1->keyLen;
-  int32_t kvLen2 = kv2->keyLen;
-  int32_t res = strncasecmp(kv1->key, kv2->key, TMIN(kvLen1, kvLen2));
-  if (res != 0) {
-    return res;
-  } else {
-    return kvLen1-kvLen2;
-  }
-}
-
-static void smlBuildChildTableName(SSmlTableInfo *tags) {
-  int32_t size = taosArrayGetSize(tags->tags);
-  ASSERT(size > 0);
-  taosArraySort(tags->tags, smlCompareKv);
-
-  SStringBuilder sb = {0};
-  taosStringBuilderAppendStringLen(&sb, tags->sTableName, tags->sTableNameLen);
-  for (int j = 0; j < size; ++j) {
-    SSmlKv *tagKv = taosArrayGetP(tags->tags, j);
-    taosStringBuilderAppendStringLen(&sb, tagKv->key, tagKv->keyLen);
-    taosStringBuilderAppendStringLen(&sb, tagKv->value, tagKv->valueLen);
-  }
-  size_t len = 0;
-  char* keyJoined = taosStringBuilderGetResult(&sb, &len);
-  T_MD5_CTX context;
-  tMD5Init(&context);
-  tMD5Update(&context, (uint8_t *)keyJoined, (uint32_t)len);
-  tMD5Final(&context);
-  uint64_t digest1 = *(uint64_t*)(context.digest);
-  //uint64_t digest2 = *(uint64_t*)(context.digest + 8);
-  //snprintf(tags->childTableName, TSDB_TABLE_NAME_LEN, "t_%016"PRIx64"%016"PRIx64, digest1, digest2);
-  snprintf(tags->childTableName, TSDB_TABLE_NAME_LEN, "t_%016"PRIx64, digest1);
-  taosStringBuilderDestroy(&sb);
-  tags->uid = digest1;
-}
-
 static int32_t smlGenerateSchemaAction(SSchema* pointColField, SHashObj* dbAttrHash, SArray* dbAttrArray, bool isTag, char sTableName[],
                                        SSchemaAction* action, bool* actionNeeded, SSmlHandle* info) {
 //  char fieldName[TSDB_COL_NAME_LEN] = {0};
@@ -444,6 +422,7 @@ static int32_t smlModifyDBSchemas(SSmlHandle* info) {
         uError("SML:0x%"PRIx64" catalogGetSTableMeta failed. super table name %s", info->id, schemaAction.createSTable.sTableName);
         return code;
       }
+      info->cost.numOfCreateSTables++;
     }else if (code == TSDB_CODE_SUCCESS) {
     } else {
       uError("SML:0x%"PRIx64" load table meta error: %s", info->id, tstrerror(code));
@@ -926,20 +905,6 @@ static bool smlParseValue(SSmlKv *pVal, SSmlMsgBuf *msg) {
   return false;
 }
 
-static bool checkDuplicateKey(char *key, SHashObj *pHash, SSmlHandle* info) {
-  char *val = NULL;
-  val = taosHashGet(pHash, key, strlen(key));
-  if (val) {
-    uError("SML:0x%"PRIx64" Duplicate key detected:%s", info->id, key);
-    return true;
-  }
-
-  uint8_t dummy_val = 0;
-  taosHashPut(pHash, key, strlen(key), &dummy_val, sizeof(uint8_t));
-
-  return false;
-}
-
 static int32_t smlParseString(const char* sql, SSmlLineInfo *elements, SSmlMsgBuf *msg){
   if(!sql) return TSDB_CODE_SML_INVALID_DATA;
   while (*sql != '\0') {           // jump the space at the begining
@@ -1546,8 +1511,10 @@ static int32_t smlParseLine(SSmlHandle* info, const char* sql) {
 
     tinfo->sTableName = elements.measure;
     tinfo->sTableNameLen = elements.measureLen;
-    smlBuildChildTableName(tinfo);
-    uDebug("SML:0x%"PRIx64" child table name: %s", info->id, tinfo->childTableName);
+    RandTableName rName = {.tags=tinfo->tags, .sTableName=tinfo->sTableName, .sTableNameLen=tinfo->sTableNameLen,
+                            .childTableName=tinfo->childTableName};
+    buildChildTableName(&rName);
+    tinfo->uid = rName.uid;
 
     SSmlSTableMeta** tableMeta = taosHashGet(info->superTables, elements.measure, elements.measureLen);
     if(tableMeta){  // update meta
@@ -1604,7 +1571,7 @@ static void smlDestroyInfo(SSmlHandle* info){
 
 static SSmlHandle* smlBuildSmlInfo(TAOS* taos, SRequestObj* request, SMLProtocolType protocol, int8_t precision, bool dataFormat){
   int32_t code = TSDB_CODE_SUCCESS;
-  SSmlHandle* info = taosMemoryMalloc(sizeof(SSmlHandle));
+  SSmlHandle* info = taosMemoryCalloc(1, sizeof(SSmlHandle));
   if (NULL == info) {
     return NULL;
   }
@@ -1699,12 +1666,23 @@ static int32_t smlInsertData(SSmlHandle* info) {
   }
 
   smlBuildOutput(info->exec, info->pVgHash);
+  info->cost.insertRpcTime = taosGetTimestampUs();
+
   launchQueryImpl(info->pRequest, info->pQuery, TSDB_CODE_SUCCESS, true);
 
   info->affectedRows = taos_affected_rows(info->pRequest);
   return info->pRequest->code;
 }
 
+static void smlPrintStatisticInfo(SSmlHandle *info){
+  uError("SML:0x%"PRIx64" smlInsertLines result, code:%d,lineNum:%d,stable num:%d,ctable num:%d,create stable num:%d \
+        parse cost:%"PRId64",schema cost:%"PRId64",bind cost:%"PRId64",rpc cost:%"PRId64",total cost:%"PRId64"", info->id, info->cost.code,
+         info->cost.lineNum, info->cost.numOfSTables, info->cost.numOfCTables, info->cost.numOfCreateSTables,
+         info->cost.schemaTime-info->cost.parseTime, info->cost.insertBindTime-info->cost.schemaTime,
+         info->cost.insertRpcTime-info->cost.insertBindTime, info->cost.endTime-info->cost.insertRpcTime,
+         info->cost.endTime-info->cost.parseTime);
+}
+
 static int smlInsertLines(SSmlHandle *info, char* lines[], int numLines) {
   int32_t code = TSDB_CODE_SUCCESS;
 
@@ -1714,6 +1692,7 @@ static int smlInsertLines(SSmlHandle *info, char* lines[], int numLines) {
     goto cleanup;
   }
 
+  info->cost.parseTime = taosGetTimestampUs();
   for (int32_t i = 0; i < numLines; ++i) {
     code = smlParseLine(info, lines[i]);
     if (code != TSDB_CODE_SUCCESS) {
@@ -1721,24 +1700,29 @@ static int smlInsertLines(SSmlHandle *info, char* lines[], int numLines) {
       goto cleanup;
     }
   }
-  uDebug("SML:0x%"PRIx64" smlInsertLines parse success. tables %d", info->id, taosHashGetSize(info->childTables));
-  uDebug("SML:0x%"PRIx64" smlInsertLines parse success. super tables %d", info->id, taosHashGetSize(info->superTables));
 
+  info->cost.lineNum = numLines;
+  info->cost.numOfSTables = taosHashGetSize(info->superTables);
+  info->cost.numOfCTables = taosHashGetSize(info->childTables);
+
+  info->cost.schemaTime = taosGetTimestampUs();
   code = smlModifyDBSchemas(info);
   if (code != 0) {
     uError("SML:0x%"PRIx64" smlModifyDBSchemas error : %s", info->id, tstrerror(code));
     goto cleanup;
   }
 
+  info->cost.insertBindTime = taosGetTimestampUs();
   code = smlInsertData(info);
   if (code != 0) {
     uError("SML:0x%"PRIx64" smlInsertData error : %s", info->id, tstrerror(code));
     goto cleanup;
   }
-
-  uDebug("SML:0x%"PRIx64" smlInsertLines finish inserting %d lines.", info->id, numLines);
+  info->cost.endTime = taosGetTimestampUs();
 
 cleanup:
+  info->cost.code = code;
+  smlPrintStatisticInfo(info);
   return code;
 }
 
@@ -1790,7 +1774,6 @@ TAOS_RES* taos_schemaless_insert(TAOS* taos, char* lines[], int numLines, int pr
   }
   smlDestroyInfo(info);
 
-end:
   return (TAOS_RES*)request;
 }
 
diff --git a/source/common/src/tname.c b/source/common/src/tname.c
index f4755f5b5e4e924ed0c917701430c97c4e08f5ef..62ba4bfb792e34a2c3d45fb300bcf0ead865aa97 100644
--- a/source/common/src/tname.c
+++ b/source/common/src/tname.c
@@ -15,6 +15,8 @@
 
 #define _DEFAULT_SOURCE
 #include "tname.h"
+#include "tcommon.h"
+#include "tstrbuild.h"
 
 #define VALID_NAME_TYPE(x)  ((x) == TSDB_DB_NAME_T || (x) == TSDB_TABLE_NAME_T)
 
@@ -294,4 +296,43 @@ int32_t tNameFromString(SName* dst, const char* str, uint32_t type) {
   return 0;
 }
 
+static int compareKv(const void* p1, const void* p2) {
+  SSmlKv* kv1 = *(SSmlKv**)p1;
+  SSmlKv* kv2 = *(SSmlKv**)p2;
+  int32_t kvLen1 = kv1->keyLen;
+  int32_t kvLen2 = kv2->keyLen;
+  int32_t res = strncasecmp(kv1->key, kv2->key, TMIN(kvLen1, kvLen2));
+  if (res != 0) {
+    return res;
+  } else {
+    return kvLen1-kvLen2;
+  }
+}
 
+/*
+ * use stable name and tags to grearate child table name
+ */
+void buildChildTableName(RandTableName *rName) {
+  int32_t size = taosArrayGetSize(rName->tags);
+  ASSERT(size > 0);
+  taosArraySort(rName->tags, compareKv);
+
+  SStringBuilder sb = {0};
+  taosStringBuilderAppendStringLen(&sb, rName->sTableName, rName->sTableNameLen);
+  for (int j = 0; j < size; ++j) {
+    SSmlKv *tagKv = taosArrayGetP(rName->tags, j);
+    taosStringBuilderAppendStringLen(&sb, tagKv->key, tagKv->keyLen);
+    taosStringBuilderAppendStringLen(&sb, tagKv->value, tagKv->valueLen);
+  }
+  size_t len = 0;
+  char* keyJoined = taosStringBuilderGetResult(&sb, &len);
+  T_MD5_CTX context;
+  tMD5Init(&context);
+  tMD5Update(&context, (uint8_t *)keyJoined, (uint32_t)len);
+  tMD5Final(&context);
+  uint64_t digest1 = *(uint64_t*)(context.digest);
+  uint64_t digest2 = *(uint64_t*)(context.digest + 8);
+  snprintf(rName->childTableName, TSDB_TABLE_NAME_LEN, "t_%016"PRIx64"%016"PRIx64, digest1, digest2);
+  taosStringBuilderDestroy(&sb);
+  rName->uid = digest1;
+}