diff --git a/src/common/inc/tdataformat.h b/src/common/inc/tdataformat.h
index ddacc1ed01a92ac12cb365263c2b453d72909e99..f77d3c6dc7e3d77bd7e175672fde774831907ecc 100644
--- a/src/common/inc/tdataformat.h
+++ b/src/common/inc/tdataformat.h
@@ -161,7 +161,6 @@ typedef struct {
   int      maxRowSize;
   int      maxCols;    // max number of columns
   int      maxPoints;  // max number of points
-  int      exColBytes; // extra column bytes to allocate for each column
 
   int      numOfPoints;
   int      numOfCols;  // Total number of cols
@@ -175,7 +174,7 @@ typedef struct {
 #define dataColsKeyFirst(pCols) dataColsKeyAt(pCols, 0)
 #define dataColsKeyLast(pCols) dataColsKeyAt(pCols, (pCols)->numOfPoints - 1)
 
-SDataCols *tdNewDataCols(int maxRowSize, int maxCols, int maxRows, int exColBytes);
+SDataCols *tdNewDataCols(int maxRowSize, int maxCols, int maxRows);
 void       tdResetDataCols(SDataCols *pCols);
 void       tdInitDataCols(SDataCols *pCols, STSchema *pSchema);
 SDataCols *tdDupDataCols(SDataCols *pCols, bool keepData);
diff --git a/src/common/src/tdataformat.c b/src/common/src/tdataformat.c
index 54402528ba219166b9769a2e60cbaef5912cfdb8..b0281cbd00c3fd5cef07593515e9622af302e5d2 100644
--- a/src/common/src/tdataformat.c
+++ b/src/common/src/tdataformat.c
@@ -287,16 +287,15 @@ void dataColSetOffset(SDataCol *pCol, int nEle, int maxPoints) {
   }
 }
 
-SDataCols *tdNewDataCols(int maxRowSize, int maxCols, int maxRows, int exColBytes) {
+SDataCols *tdNewDataCols(int maxRowSize, int maxCols, int maxRows) {
   SDataCols *pCols = (SDataCols *)calloc(1, sizeof(SDataCols) + sizeof(SDataCol) * maxCols);
   if (pCols == NULL) return NULL;
 
   pCols->maxRowSize = maxRowSize;
   pCols->maxCols = maxCols;
   pCols->maxPoints = maxRows;
-  pCols->exColBytes = exColBytes;
 
-  pCols->buf = malloc(maxRowSize * maxRows + exColBytes * maxCols);
+  pCols->buf = malloc(maxRowSize * maxRows);
   if (pCols->buf == NULL) {
     free(pCols);
     return NULL;
@@ -312,16 +311,13 @@ void tdInitDataCols(SDataCols *pCols, STSchema *pSchema) {
 
   void *ptr = pCols->buf;
   for (int i = 0; i < schemaNCols(pSchema); i++) {
-    if (i > 0) {
-      pCols->cols[i].pData = (char *)(pCols->cols[i - 1].pData) + schemaColAt(pSchema, i - 1)->bytes * pCols->maxPoints;
-    }
     pCols->cols[i].type = colType(schemaColAt(pSchema, i));
     pCols->cols[i].bytes = colBytes(schemaColAt(pSchema, i));
     pCols->cols[i].offset = colOffset(schemaColAt(pSchema, i)) + TD_DATA_ROW_HEAD_SIZE;
     pCols->cols[i].colId = colColId(schemaColAt(pSchema, i));
     pCols->cols[i].pData = ptr;
 
-    ptr = ptr + pCols->exColBytes + colBytes(schemaColAt(pSchema, i)) * pCols->maxPoints;
+    ptr = ptr + colBytes(schemaColAt(pSchema, i)) * pCols->maxPoints;
     if (colType(schemaColAt(pSchema, i)) == TSDB_DATA_TYPE_BINARY ||
         colType(schemaColAt(pSchema, i)) == TSDB_DATA_TYPE_NCHAR)
       ptr = ptr + (sizeof(int32_t) + sizeof(int16_t)) * pCols->maxPoints;
@@ -337,7 +333,7 @@ void tdFreeDataCols(SDataCols *pCols) {
 
 SDataCols *tdDupDataCols(SDataCols *pDataCols, bool keepData) {
   SDataCols *pRet =
-      tdNewDataCols(pDataCols->maxRowSize, pDataCols->maxCols, pDataCols->maxPoints, pDataCols->exColBytes);
+      tdNewDataCols(pDataCols->maxRowSize, pDataCols->maxCols, pDataCols->maxPoints);
   if (pRet == NULL) return NULL;
 
   pRet->numOfCols = pDataCols->numOfCols;
diff --git a/src/query/tests/astTest.cpp b/src/query/tests/astTest.cpp
index dee85ef63002b91e08cf32d7f1eb6417c1afac7c..d767e7ad7b427dd99c841c622a26ccda1a8141e9 100644
--- a/src/query/tests/astTest.cpp
+++ b/src/query/tests/astTest.cpp
@@ -582,7 +582,7 @@ void exprSerializeTest1() {
   tExprTreeDestroy(&p1, nullptr);
   tExprTreeDestroy(&p2, nullptr);
   
-  tbufClose(&bw);
+  // tbufClose(&bw);
 }
 
 void exprSerializeTest2() {
@@ -627,7 +627,7 @@ void exprSerializeTest2() {
   tExprTreeDestroy(&p1, nullptr);
   tExprTreeDestroy(&p2, nullptr);
 
-  tbufClose(&bw);
+  // tbufClose(&bw);
 }
 }  // namespace
 TEST(testCase, astTest) {
diff --git a/src/tsdb/src/tsdbMain.c b/src/tsdb/src/tsdbMain.c
index 299084e2ec66b6959e0ef59c4a21913e78d110e4..095e84491733d57bff878ce7bbdc86dc6a4d76b2 100644
--- a/src/tsdb/src/tsdbMain.c
+++ b/src/tsdb/src/tsdbMain.c
@@ -879,9 +879,7 @@ static void *tsdbCommitData(void *arg) {
   }
 
   if (tsdbInitWriteHelper(&whelper, pRepo) < 0) goto _exit;
-  if ((pDataCols = tdNewDataCols(pMeta->maxRowBytes, pMeta->maxCols, pCfg->maxRowsPerFileBlock,
-                                 sizeof(TSCKSUM) + COMP_OVERFLOW_BYTES)) == NULL)
-    goto _exit;
+  if ((pDataCols = tdNewDataCols(pMeta->maxRowBytes, pMeta->maxCols, pCfg->maxRowsPerFileBlock)) == NULL) goto _exit;
 
   int sfid = tsdbGetKeyFileId(pCache->imem->keyFirst, pCfg->daysPerFile, pCfg->precision);
   int efid = tsdbGetKeyFileId(pCache->imem->keyLast, pCfg->daysPerFile, pCfg->precision);
diff --git a/src/tsdb/src/tsdbRWHelper.c b/src/tsdb/src/tsdbRWHelper.c
index a5cf75ae3b09d8f33239d38bbfb405002be4926e..888ee069ae40a0e98e4dbe0990aef359fc2a515c 100644
--- a/src/tsdb/src/tsdbRWHelper.c
+++ b/src/tsdb/src/tsdbRWHelper.c
@@ -90,8 +90,8 @@ static void tsdbResetHelperBlock(SRWHelper *pHelper) {
 }
 
 static int tsdbInitHelperBlock(SRWHelper *pHelper) {
-  pHelper->pDataCols[0] = tdNewDataCols(pHelper->config.maxRowSize, pHelper->config.maxCols, pHelper->config.maxRows, sizeof(TSCKSUM) + COMP_OVERFLOW_BYTES);
-  pHelper->pDataCols[1] = tdNewDataCols(pHelper->config.maxRowSize, pHelper->config.maxCols, pHelper->config.maxRows, sizeof(TSCKSUM) + COMP_OVERFLOW_BYTES);
+  pHelper->pDataCols[0] = tdNewDataCols(pHelper->config.maxRowSize, pHelper->config.maxCols, pHelper->config.maxRows);
+  pHelper->pDataCols[1] = tdNewDataCols(pHelper->config.maxRowSize, pHelper->config.maxCols, pHelper->config.maxRows);
   if (pHelper->pDataCols[0] == NULL || pHelper->pDataCols[1] == NULL) return -1;
 
   tsdbResetHelperBlockImpl(pHelper);
diff --git a/src/tsdb/src/tsdbRead.c b/src/tsdb/src/tsdbRead.c
index dea1eadc005e3394bf6f9345195d9d4e8743e559..bc9220dbc72b197785b5fa227340def9e1839dbb 100644
--- a/src/tsdb/src/tsdbRead.c
+++ b/src/tsdb/src/tsdbRead.c
@@ -407,7 +407,7 @@ static bool doLoadFileDataBlock(STsdbQueryHandle* pQueryHandle, SCompBlock* pBlo
   SArray* sa = getDefaultLoadColumns(pQueryHandle, true);
 
   if (pCheckInfo->pDataCols == NULL) {
-    pCheckInfo->pDataCols = tdNewDataCols(1000, 2, 4096, 0);
+    pCheckInfo->pDataCols = tdNewDataCols(1000, 2, 4096);
   }
 
   tdInitDataCols(pCheckInfo->pDataCols, tsdbGetTableSchema(tsdbGetMeta(pQueryHandle->pTsdb), pCheckInfo->pTableObj));
diff --git a/src/tsdb/tests/tsdbTests.cpp b/src/tsdb/tests/tsdbTests.cpp
index 0e5d59b4feb01d35473243cb66e2064de8530a08..c7ed6fcae11eb3c86c4728c4fd980a10638c16f7 100644
--- a/src/tsdb/tests/tsdbTests.cpp
+++ b/src/tsdb/tests/tsdbTests.cpp
@@ -245,7 +245,7 @@ TEST(TsdbTest, DISABLED_openRepo) {
 //   tsdbLoadCompCols(&pGroup->files[TSDB_FILE_TYPE_DATA], pBlock, (void *)pCompData);
 
   // STable *pTable = tsdbGetTableByUid(pRepo->tsdbMeta, pCompData->uid);
-  // SDataCols *pDataCols = tdNewDataCols(tdMaxRowBytesFromSchema(tsdbGetTableSchema(pRepo->tsdbMeta, pTable)), 5, 10);
+  // SDataCols *pDataCols = tdNewDataCols(tdMaxRowBytesFromSchema(tsdbGetTableSchema(pRepo->tsdbMeta, pTable)), 5);
   // tdInitDataCols(pDataCols, tsdbGetTableSchema(pRepo->tsdbMeta, pTable));
 
 //   tsdbLoadDataBlock(&pGroup->files[TSDB_FILE_TYPE_DATA], pBlock, 1, pDataCols, pCompData);