diff --git a/source/common/src/systable.c b/source/common/src/systable.c
index e74f6d0aa3..f2778042bf 100644
--- a/source/common/src/systable.c
+++ b/source/common/src/systable.c
@@ -423,6 +423,7 @@ static const SSysDbTableSchema filesetsFullSchema[] = {
     {.name = "fileset_id", .bytes = 4, .type = TSDB_DATA_TYPE_INT, .sysInfo = false},
     {.name = "start_time", .bytes = 8, .type = TSDB_DATA_TYPE_TIMESTAMP, .sysInfo = false},
     {.name = "end_time", .bytes = 8, .type = TSDB_DATA_TYPE_TIMESTAMP, .sysInfo = false},
+    {.name = "total_size", .bytes = 8, .type = TSDB_DATA_TYPE_BIGINT, .sysInfo = false},
     {.name = "last_compact", .bytes = 8, .type = TSDB_DATA_TYPE_TIMESTAMP, .sysInfo = false},
     {.name = "shold_compact", .bytes = 1, .type = TSDB_DATA_TYPE_BOOL, .sysInfo = false},
     // {.name = "details", .bytes = 256 + VARSTR_HEADER_SIZE, .type = TSDB_DATA_TYPE_VARCHAR, .sysInfo = false},
diff --git a/source/dnode/vnode/src/tsdb/tsdbFS2.c b/source/dnode/vnode/src/tsdb/tsdbFS2.c
index c5f27768b2..ef2766acda 100644
--- a/source/dnode/vnode/src/tsdb/tsdbFS2.c
+++ b/source/dnode/vnode/src/tsdb/tsdbFS2.c
@@ -1242,10 +1242,12 @@ void tsdbFinishTaskOnFileSet(STsdb *tsdb, int32_t fid) {
 
 struct SFileSetReader {
   STsdb     *pTsdb;
+  STFileSet *pFileSet;
   int32_t    fid;
   int64_t    startTime;
   int64_t    endTime;
-  STFileSet *pFileSet;
+  int64_t    lastCompactTime;
+  int64_t    totalSize;
 };
 
 int32_t tsdbFileSetReaderOpen(void *pVnode, struct SFileSetReader **ppReader) {
@@ -1270,7 +1272,8 @@ int32_t tsdbFileSetReaderOpen(void *pVnode, struct SFileSetReader **ppReader) {
 }
 
 static int32_t tsdbFileSetReaderNextNoLock(struct SFileSetReader *pReader) {
-  STsdb *pTsdb = pReader->pTsdb;
+  STsdb  *pTsdb = pReader->pTsdb;
+  int32_t code = TSDB_CODE_SUCCESS;
 
   tsdbTFileSetClear(&pReader->pFileSet);
 
@@ -1284,9 +1287,28 @@ static int32_t tsdbFileSetReaderNextNoLock(struct SFileSetReader *pReader) {
     return TSDB_CODE_NOT_FOUND;
   }
 
-  pReader->fid = (*fsetPtr)->fid;
+  // ref file set
+  code = tsdbTFileSetInitRef(pReader->pTsdb, *fsetPtr, &pReader->pFileSet);
+  if (code) return code;
+
+  // get file set details
+  pReader->fid = pReader->pFileSet->fid;
   tsdbFidKeyRange(pReader->fid, pTsdb->keepCfg.days, pTsdb->keepCfg.precision, &pReader->startTime, &pReader->endTime);
-  return tsdbTFileSetInitRef(pReader->pTsdb, *fsetPtr, &pReader->pFileSet);
+  pReader->lastCompactTime = 0;  // TODO
+  pReader->totalSize = 0;
+  for (int32_t i = 0; i < TSDB_FTYPE_MAX; i++) {
+    STFileObj *fobj = pReader->pFileSet->farr[i];
+    if (fobj) {
+      pReader->totalSize += fobj->f->size;
+    }
+  }
+  SSttLvl *lvl;
+  TARRAY2_FOREACH(pReader->pFileSet->lvlArr, lvl) {
+    STFileObj *fobj;
+    TARRAY2_FOREACH(lvl->fobjArr, fobj) { pReader->totalSize += fobj->f->size; }
+  }
+
+  return code;
 }
 
 int32_t tsdbFileSetReaderNext(struct SFileSetReader *pReader) {
@@ -1322,9 +1344,15 @@ int32_t tsdbFileSetGetEntryField(struct SFileSetReader *pReader, const char *fie
     return TSDB_CODE_SUCCESS;
   }
 
+  fieldName = "total_size";
+  if (strncmp(field, fieldName, strlen(fieldName) + 1) == 0) {
+    *(int64_t *)value = pReader->totalSize;
+    return TSDB_CODE_SUCCESS;
+  }
+
   fieldName = "last_compact_time";
   if (strncmp(field, fieldName, strlen(fieldName) + 1) == 0) {
-    *(int64_t *)value = 0;  // TODO
+    *(int64_t *)value = pReader->lastCompactTime;
     return TSDB_CODE_SUCCESS;
   }
 
diff --git a/source/libs/executor/src/sysscanoperator.c b/source/libs/executor/src/sysscanoperator.c
index ec71bb721b..7b79d25f96 100644
--- a/source/libs/executor/src/sysscanoperator.c
+++ b/source/libs/executor/src/sysscanoperator.c
@@ -2105,11 +2105,20 @@ static SSDataBlock* sysTableBuildUserFileSets(SOperatorInfo* pOperator) {
       code = colDataSetVal(pColInfoData, numOfRows, (char*)&endTime, false);
       QUERY_CHECK_CODE(code, lino, _end);
 
+      // total_size
+      int64_t totalSize = 0;
+      code = pAPI->tsdReader.fileSetGetEntryField(pInfo->pFileSetReader, "total_size", &totalSize);
+      QUERY_CHECK_CODE(code, lino, _end);
+      pColInfoData = taosArrayGet(p->pDataBlock, 6);
+      QUERY_CHECK_NULL(pColInfoData, code, lino, _end, terrno);
+      code = colDataSetVal(pColInfoData, numOfRows, (char*)&totalSize, false);
+      QUERY_CHECK_CODE(code, lino, _end);
+
       // last_compact
       int64_t lastCompacat = 0;
       code = pAPI->tsdReader.fileSetGetEntryField(pInfo->pFileSetReader, "last_compact_time", &lastCompacat);
       QUERY_CHECK_CODE(code, lino, _end);
-      pColInfoData = taosArrayGet(p->pDataBlock, 6);
+      pColInfoData = taosArrayGet(p->pDataBlock, 7);
       QUERY_CHECK_NULL(pColInfoData, code, lino, _end, terrno);
       code = colDataSetVal(pColInfoData, numOfRows, (char*)&lastCompacat, false);
       QUERY_CHECK_CODE(code, lino, _end);
@@ -2118,7 +2127,7 @@ static SSDataBlock* sysTableBuildUserFileSets(SOperatorInfo* pOperator) {
       bool shouldCompact = false;
       code = pAPI->tsdReader.fileSetGetEntryField(pInfo->pFileSetReader, "should_compact", &shouldCompact);
       QUERY_CHECK_CODE(code, lino, _end);
-      pColInfoData = taosArrayGet(p->pDataBlock, 7);
+      pColInfoData = taosArrayGet(p->pDataBlock, 8);
       QUERY_CHECK_NULL(pColInfoData, code, lino, _end, terrno);
       code = colDataSetVal(pColInfoData, numOfRows, (char*)&shouldCompact, false);
       QUERY_CHECK_CODE(code, lino, _end);
@@ -2127,7 +2136,7 @@ static SSDataBlock* sysTableBuildUserFileSets(SOperatorInfo* pOperator) {
       // const char* details = NULL;
       // code = pAPI->tsdReader.fileSetGetEntryField(pInfo->pFileSetReader, "details", &details);
       // QUERY_CHECK_CODE(code, lino, _end);
-      // pColInfoData = taosArrayGet(p->pDataBlock, 8);
+      // pColInfoData = taosArrayGet(p->pDataBlock, 9);
       // QUERY_CHECK_NULL(pColInfoData, code, lino, _end, terrno);
       // code = colDataSetVal(pColInfoData, numOfRows, (char*)&vgId, false);
       // QUERY_CHECK_CODE(code, lino, _end);