diff --git a/src/tsdb/inc/tsdbReadImpl.h b/src/tsdb/inc/tsdbReadImpl.h
index f067905f5c0dcf4fde64dfc066d4d1a1dbabb25d..20d8b88c839411136793556de55450577ffecaec 100644
--- a/src/tsdb/inc/tsdbReadImpl.h
+++ b/src/tsdb/inc/tsdbReadImpl.h
@@ -71,11 +71,10 @@ typedef struct {
  * blkVer;     // 0 - original block, 1 - block since importing .smad/.smal
  * aggrOffset; // only valid when blkVer > 0 and aggrStat > 0
  */
-#define SBlockFieldsP1      \
-  uint64_t aggrStat : 3;    \
-  uint64_t blkVer : 5;      \
-  uint64_t aggrOffset : 56; \
-  uint32_t aggrLen
+#define SBlockFieldsP1   \
+  uint64_t aggrStat : 1; \
+  uint64_t blkVer : 7;   \
+  uint64_t aggrOffset : 56
 
 typedef struct {
   SBlockFieldsP0;
@@ -125,7 +124,6 @@ typedef struct {
   int32_t  len;
   uint32_t type : 8;
   uint32_t offset : 24;
-  // char     padding[];
 } SBlockColV1;
 
 #define SBlockCol SBlockColV1      // latest SBlockCol definition
@@ -160,10 +158,8 @@ typedef struct {
   uint64_t  uid;        // For recovery usage
   SBlockCol cols[];
 } SBlockData;
-typedef struct {
-  int32_t     numOfCols;  // For recovery usage
-  SAggrBlkCol cols[];
-} SAggrBlkData;
+
+typedef void SAggrBlkData;  // SBlockCol cols[];
 
 struct SReadH {
   STsdbRepo * pRepo;
@@ -207,8 +203,7 @@ static FORCE_INLINE size_t tsdbBlockStatisSize(int nCols, uint32_t blkVer) {
   }
 }
 
-#define TSDB_BLOCK_AGGR_SIZE(ncols, blkVer) \
-  (sizeof(SAggrBlkData) + sizeof(SAggrBlkColV##blkVer) * (ncols) + sizeof(TSCKSUM))
+#define TSDB_BLOCK_AGGR_SIZE(ncols, blkVer) (sizeof(SAggrBlkColV##blkVer) * (ncols) + sizeof(TSCKSUM))
 
 static FORCE_INLINE size_t tsdbBlockAggrSize(int nCols, uint32_t blkVer) {
   switch (blkVer) {
diff --git a/src/tsdb/src/tsdbCommit.c b/src/tsdb/src/tsdbCommit.c
index 53ca51004fc406b05028d13be7cd2bf054771c0d..eccdcbdbf6155ca37dc35bc171189de3781e8642 100644
--- a/src/tsdb/src/tsdbCommit.c
+++ b/src/tsdb/src/tsdbCommit.c
@@ -1080,11 +1080,10 @@ int tsdbWriteBlockImpl(STsdbRepo *pRepo, STable *pTable, SDFile *pDFile, SDFile
 
   // Get # of cols not all NULL(not including key column)
   int nColsNotAllNull = 0;
-  int nAggrCols = 0;
   for (int ncol = 1; ncol < pDataCols->numOfCols; ncol++) {  // ncol from 1, we skip the timestamp column
     SDataCol *   pDataCol = pDataCols->cols + ncol;
     SBlockCol *  pBlockCol = pBlockData->cols + nColsNotAllNull;
-    SAggrBlkCol *pAggrBlkCol = pAggrBlkData->cols + nColsNotAllNull;
+    SAggrBlkCol *pAggrBlkCol = (SAggrBlkCol *)pAggrBlkData + nColsNotAllNull;
 
     if (isAllRowsNull(pDataCol)) {  // all data to commit are NULL, just ignore it
       continue;
@@ -1106,7 +1105,6 @@ int tsdbWriteBlockImpl(STsdbRepo *pRepo, STable *pTable, SDFile *pDFile, SDFile
       (*tDataTypes[pDataCol->type].statisFunc)(pDataCol->pData, rowsToWrite, &(pAggrBlkCol->min), &(pAggrBlkCol->max),
                                                &(pAggrBlkCol->sum), &(pAggrBlkCol->minIndex), &(pAggrBlkCol->maxIndex),
                                                &(pAggrBlkCol->numOfNull));
-      ++nAggrCols;
     }
     nColsNotAllNull++;
   }
@@ -1188,9 +1186,8 @@ int tsdbWriteBlockImpl(STsdbRepo *pRepo, STable *pTable, SDFile *pDFile, SDFile
     return -1;
   }
 
-  uint32_t aggrStatus = ((nAggrCols > 0) && (rowsToWrite > 8)) ? 1 : 0;  // TODO: How to make the decision?
+  uint32_t aggrStatus = ((nColsNotAllNull > 0) && (rowsToWrite > 8)) ? 1 : 0;  // TODO: How to make the decision?
   if (aggrStatus > 0) {
-    pAggrBlkData->numOfCols = nColsNotAllNull;
 
     taosCalcChecksumAppend(0, (uint8_t *)pAggrBlkData, tsizeAggr);
     tsdbUpdateDFileMagic(pDFileAggr, POINTER_SHIFT(pAggrBlkData, tsizeAggr - sizeof(TSCKSUM)));
@@ -1216,7 +1213,6 @@ int tsdbWriteBlockImpl(STsdbRepo *pRepo, STable *pTable, SDFile *pDFile, SDFile
   pBlock->aggrStat = aggrStatus;
   pBlock->blkVer = SBlockVerLatest;
   pBlock->aggrOffset = (uint64_t)offsetAggr;
-  pBlock->aggrLen = tsizeAggr;
 
   tsdbDebug("vgId:%d tid:%d a block of data is written to file %s, offset %" PRId64
             " numOfRows %d len %d numOfCols %" PRId16 " keyFirst %" PRId64 " keyLast %" PRId64,
diff --git a/src/tsdb/src/tsdbReadImpl.c b/src/tsdb/src/tsdbReadImpl.c
index e55944d5bb83ca614da862f9c350a41690b0ca6e..4976e8b8fb8213b6a9cdedbf380d812e117f1fc8 100644
--- a/src/tsdb/src/tsdbReadImpl.c
+++ b/src/tsdb/src/tsdbReadImpl.c
@@ -580,12 +580,12 @@ void tsdbGetBlockStatis(SReadH *pReadh, SDataStatis *pStatis, int numOfCols, SBl
     SAggrBlkData *pAggrBlkData = pReadh->pAggrBlkData;
 
     for (int i = 0, j = 0; i < numOfCols;) {
-      if (j >= pAggrBlkData->numOfCols) {
+      if (j >= pBlock->numOfCols) {
         pStatis[i].numOfNull = -1;
         i++;
         continue;
       }
-      SAggrBlkCol *pAggrBlkCol = ((SAggrBlkCol *)(pAggrBlkData->cols)) + j;
+      SAggrBlkCol *pAggrBlkCol = ((SAggrBlkCol *)(pAggrBlkData)) + j;
       if (pStatis[i].colId == pAggrBlkCol->colId) {
         pStatis[i].sum = pAggrBlkCol->sum;
         pStatis[i].max = pAggrBlkCol->max;