diff --git a/source/libs/executor/inc/groupcache.h b/source/libs/executor/inc/groupcache.h
index ace43813e2..bbb6c06f3d 100755
--- a/source/libs/executor/inc/groupcache.h
+++ b/source/libs/executor/inc/groupcache.h
@@ -24,19 +24,11 @@ extern "C" {
 
 #pragma pack(push, 1) 
 typedef struct SGcBlkBufBasic {
+  uint32_t          fileId;
   int64_t           blkId;
   int64_t           offset;
   int64_t           bufSize;
 } SGcBlkBufBasic;
-
-typedef struct SGcBlkBufInfo {
-  SGcBlkBufBasic    basic;
-  uint32_t          fileId;
-  void*             next;
-  void*             pBuf;
-  SGcDownstreamCtx* pCtx;
-  SGroupCacheData*  pGroup;
-} SGcBlkBufInfo;
 #pragma pack(pop)
 
 typedef struct SGroupCacheFileFd {
@@ -44,25 +36,40 @@ typedef struct SGroupCacheFileFd {
   TdFilePtr     fd;
 } SGroupCacheFileFd;
 
-typedef struct SGcVgroupCtx {
-  SArray*         pTbList;
-  uint64_t        lastUid;
+typedef struct SGcFileCacheCtx {
   int64_t         fileSize;
   uint32_t        fileId;
-  SSHashObj*      pCacheFile;
+  SHashObj*       pCacheFile;
   int32_t         baseNameLen;
   char            baseFilename[PATH_MAX];  
+} SGcFileCacheCtx;
+
+typedef struct SGcDownstreamCtx {
+  int32_t         id;
+  SRWLatch        grpLock;
+  int64_t         fetchSessionId;
+  SArray*         pNewGrpList; // SArray<SGcNewGroupInfo>
+  SSHashObj*      pVgTbHash;
+  SHashObj*       pGrpHash;
+  SRWLatch        blkLock;
+  SSDataBlock*    pBaseBlock;
+  SArray*         pFreeBlock;
+  int64_t         lastBlkUid;
+  SHashObj*       pSessions;  
+  SHashObj*       pWaitSessions; 
+  SGcFileCacheCtx fileCtx;
+} SGcDownstreamCtx;
+
+typedef struct SGcVgroupCtx {
+  SArray*         pTbList;
+  uint64_t        lastBlkUid;
+  SGcFileCacheCtx fileCtx;
 } SGcVgroupCtx;
 
-typedef struct SGroupSeqBlkList {
-  SRWLatch       lock;
-  SArray*        pList;
-} SGroupSeqBlkList;
-
-typedef struct SGroupBatchBlkList {
+typedef struct SGcBlkList {
   SRWLatch         lock;
   SArray*          pList;
-} SGroupBatchBlkList;
+} SGcBlkList;
 
 typedef struct SGroupCacheData {
   TdThreadMutex  mutex;
@@ -72,10 +79,7 @@ typedef struct SGroupCacheData {
   SGcVgroupCtx*  pVgCtx;
   int32_t        downstreamIdx;
   int32_t        vgId;
-  union {
-    SGroupSeqBlkList   seqList;
-    SGroupBatchBlkList batchList;
-  };
+  SGcBlkList     blkList;
   uint32_t       fileId;
   int64_t        startOffset;
 } SGroupCacheData;
@@ -103,24 +107,6 @@ typedef struct SGcNewGroupInfo {
   SOperatorParam*  pParam;
 } SGcNewGroupInfo;
 
-typedef struct SGcDownstreamCtx {
-  int32_t       id;
-  SRWLatch      grpLock;
-  int64_t       fetchSessionId;
-  SArray*       pNewGrpList; // SArray<SGcNewGroupInfo>
-  SSHashObj*    pVgTbHash;
-  SHashObj*     pGrpHash;
-  SRWLatch      blkLock;
-  SSDataBlock*  pBaseBlock;
-  SArray*       pFreeBlock;
-  int64_t       lastBlkUid;
-  SHashObj*     pSessions;  
-  SHashObj*     pWaitSessions; 
-  int32_t       cacheFileFdNum;
-  SGroupCacheFileFd cacheFileFd;
-  char          baseFilename[PATH_MAX];
-} SGcDownstreamCtx;
-
 typedef struct SGcSessionCtx {
   int32_t           downstreamIdx;
   SGcOperatorParam* pParam;
@@ -131,6 +117,14 @@ typedef struct SGcSessionCtx {
   bool              newFetch;
 } SGcSessionCtx;
 
+typedef struct SGcBlkBufInfo {
+  SGcBlkBufBasic    basic;
+  void*             next;
+  void*             pBuf;
+  SGcDownstreamCtx* pCtx;
+  SGroupCacheData*  pGroup;
+} SGcBlkBufInfo;
+
 typedef struct SGcExecInfo {
   int32_t  downstreamNum;
   int64_t* pDownstreamBlkNum;
diff --git a/source/libs/executor/src/groupcacheoperator.c b/source/libs/executor/src/groupcacheoperator.c
index 1cb0a04603..3bd071d0d1 100755
--- a/source/libs/executor/src/groupcacheoperator.c
+++ b/source/libs/executor/src/groupcacheoperator.c
@@ -95,17 +95,24 @@ static FORCE_INLINE int32_t initOpenCacheFile(SGroupCacheFileFd* pFileFd, char*
   return TSDB_CODE_SUCCESS;
 }
 
-static int32_t acquireVgroupFileFd(SGroupCacheOperatorInfo* pGCache, SGcDownstreamCtx* pCtx, SGcVgroupCtx* pVgCtx, uint32_t fileId, SGroupCacheFileFd** ppFd) {
+static int32_t acquireFdFromFileCtx(SGcFileCacheCtx* pFileCtx, uint32_t fileId, SGroupCacheFileFd** ppFd) {
   int32_t code = TSDB_CODE_SUCCESS;
-  SGroupCacheFileFd* pTmp = tSimpleHashGet(pVgCtx->pCacheFile, &fileId, sizeof(fileId));
+  if (NULL == pFileCtx->pCacheFile) {
+    pFileCtx->pCacheFile = taosHashInit(10, taosGetDefaultHashFunction(TSDB_DATA_TYPE_INT), false, HASH_ENTRY_LOCK);
+    if (NULL == pFileCtx->pCacheFile) {
+      return TSDB_CODE_OUT_OF_MEMORY;
+    }
+  }
+  
+  SGroupCacheFileFd* pTmp = taosHashGet(pFileCtx->pCacheFile, &fileId, sizeof(fileId));
   if (NULL == pTmp) {
-    sprintf(pVgCtx->baseFilename[pVgCtx->baseNameLen], "_%u", fileId);
+    sprintf(&pFileCtx->baseFilename[pFileCtx->baseNameLen], "_%u", fileId);
 
     SGroupCacheFileFd newVgFd = {0};
-    tSimpleHashPut(pVgCtx->pCacheFile, &fileId, sizeof(fileId), &newVgFd, sizeof(newVgFd));
-    pTmp = tSimpleHashGet(pVgCtx->pCacheFile, &fileId, sizeof(fileId));
+    taosHashPut(pFileCtx->pCacheFile, &fileId, sizeof(fileId), &newVgFd, sizeof(newVgFd));
+    pTmp = taosHashGet(pFileCtx->pCacheFile, &fileId, sizeof(fileId));
 
-    code = initOpenCacheFile(pTmp, pVgCtx->baseFilename);
+    code = initOpenCacheFile(pTmp, pFileCtx->baseFilename);
     if (code) {
       return code;
     }
@@ -117,37 +124,41 @@ static int32_t acquireVgroupFileFd(SGroupCacheOperatorInfo* pGCache, SGcDownstre
   return TSDB_CODE_SUCCESS;
 }
 
-static FORCE_INLINE void releaseVgroupFileFd(SGroupCacheFileFd* pFd) {
+static FORCE_INLINE void releaseFdToFileCtx(SGroupCacheFileFd* pFd) {
   taosThreadMutexUnlock(&pFd->mutex);
 }
 
-static int32_t saveBatchBlocksToDisk(SGroupCacheOperatorInfo* pGCache, SGcBlkBufInfo* pHead) {
+static int32_t saveBlocksToDisk(SGroupCacheOperatorInfo* pGCache, SGcDownstreamCtx* pCtx, SGcBlkBufInfo* pHead) {
   int32_t code = TSDB_CODE_SUCCESS;
-  SGcBlkBufBasic blkBasic;
+  SGroupCacheFileFd *pFd;
+  SGcFileCacheCtx* pFileCtx = NULL;
   
   while (NULL != pHead) {
-    SGroupCacheFileFd *pFd;
-    code = acquireDownstreamFileFd(pHead->pCtx, &pFd);
+    pFileCtx = pGCache->batchFetch ? &pHead->pCtx->fileCtx : &pHead->pGroup->pVgCtx->fileCtx;
+    
+    code = acquireFdFromFileCtx(pFileCtx, pHead->basic.fileId, &pFd);
     if (code) {
-      return code;
+      goto _return;
     }
     
     int32_t ret = taosLSeekFile(pFd->fd, pHead->basic.offset, SEEK_SET);
     if (ret == -1) {
-      releaseDownstreamFileFd();
-      return TAOS_SYSTEM_ERROR(errno);
+      releaseFdToFileCtx(pFd);
+      code = TAOS_SYSTEM_ERROR(errno);
+      goto _return;
     }
     
     ret = (int32_t)taosWriteFile(pFd->fd, pHead->pBuf, pHead->basic.bufSize);
     if (ret != pHead->basic.bufSize) {
-      releaseDownstreamFileFd();
-      return TAOS_SYSTEM_ERROR(errno);
+      releaseFdToFileCtx(pFd);
+      code = TAOS_SYSTEM_ERROR(errno);
+      goto _return;
     }
-    releaseDownstreamFileFd();
+    
+    releaseFdToFileCtx(pFd);
 
-    taosWLockLatch(&pHead->pGroup->batchList.lock);
-    taosArrayPush(pHead->pGroup->batchList.pList, &pHead->basic);
-    taosWUnLockLatch(&pHead->pGroup->batchList.lock);
+    qTrace("FileId %u, blk %" PRIu64 " size %" PRIu64 " written to offset %" PRIu64, 
+        pHead->basic.fileId, pHead->basic.blkId, pHead->basic.offset, pHead->basic.bufSize);
     
     int64_t blkId = pHead->basic.blkId;
     pHead = pHead->next;
@@ -155,56 +166,8 @@ static int32_t saveBatchBlocksToDisk(SGroupCacheOperatorInfo* pGCache, SGcBlkBuf
     taosHashRemove(pGCache->blkCache.pDirtyBlk, &blkId, sizeof(blkId));
   }
 
-  return code;
-}
 
-
-static int32_t saveSeqBlocksToDisk(SGroupCacheOperatorInfo* pGCache, SGcBlkBufInfo* pHead) {
-  int32_t code = TSDB_CODE_SUCCESS;
-
-  SGroupCacheFileFd* pFd = NULL;
-  while (NULL != pHead) {
-    code = acquireVgroupFileFd(pGCache, pHead->pCtx, pHead->pGroup->pVgCtx, pHead->fileId, &pFd);
-    if (TSDB_CODE_SUCCESS != code) {
-      return code;
-    }
-
-    int32_t ret = taosLSeekFile(pFd->fd, pHead->basic.offset, SEEK_SET);
-    if (ret == -1) {
-      code= TAOS_SYSTEM_ERROR(errno);
-      return code;
-    }
-    
-    code = (int32_t)taosWriteFile(pFd->fd, pHead->pBuf, pHead->basic.bufSize);
-    releaseVgroupFileFd(pFd);
-    if (code != pHead->basic.bufSize) {
-      code= TAOS_SYSTEM_ERROR(errno);
-      return code;
-    }
-
-    taosWLockLatch(&pHead->pGroup->batchList.lock);
-    taosArrayPush(pHead->pGroup->batchList.pList, &pHead->basic);
-    taosWUnLockLatch(&pHead->pGroup->batchList.lock);
-
-    
-    int64_t blkId = pHead->basic.blkId;
-    pHead = pHead->next;
-    
-    taosHashRemove(pGCache->blkCache.pDirtyBlk, &blkId, sizeof(blkId));
-  }
-
-  return code;
-}
-
-
-static int32_t saveBlocksToDisk(SGroupCacheOperatorInfo* pGCache, SGcDownstreamCtx* pCtx, SGcBlkBufInfo* pHead) {
-  int32_t code = TSDB_CODE_SUCCESS;
-  
-  if (pGCache->batchFetch) {
-    code = saveBatchBlocksToDisk(pGCache, pHead);
-  } else {
-    code = saveSeqBlocksToDisk(pGCache, pHead);
-  }
+_return:
 
   atomic_val_compare_exchange_32(&pGCache->blkCache.writeDownstreamId, pCtx->id, -1);
 
@@ -212,16 +175,16 @@ static int32_t saveBlocksToDisk(SGroupCacheOperatorInfo* pGCache, SGcDownstreamC
 }
 
 static int32_t addBlkToDirtyBufList(SGroupCacheOperatorInfo* pGCache, SGcDownstreamCtx* pCtx, SGcVgroupCtx* pVgCtx, SGcBlkCacheInfo* pCache, SGcBlkBufInfo* pBufInfo) {
-  if (0 != taosHashPut(pCache->pDirtyBlk, &pBufInfo->blkId, sizeof(pBufInfo->blkId), pBufInfo, sizeof(*pBufInfo))) {
+  if (0 != taosHashPut(pCache->pDirtyBlk, &pBufInfo->basic.blkId, sizeof(pBufInfo->basic.blkId), pBufInfo, sizeof(*pBufInfo))) {
     return TSDB_CODE_OUT_OF_MEMORY;
   }
-  pBufInfo = taosHashGet(pCache->pDirtyBlk, &pBufInfo->blkId, sizeof(pBufInfo->blkId));
+  pBufInfo = taosHashGet(pCache->pDirtyBlk, &pBufInfo->basic.blkId, sizeof(pBufInfo->basic.blkId));
 
   int32_t code = TSDB_CODE_SUCCESS;
   SGcBlkBufInfo* pWriteHead = NULL;
   
   taosWLockLatch(&pCache->dirtyLock);
-  pCache->blkCacheSize += pBufInfo->bufSize;
+  pCache->blkCacheSize += pBufInfo->basic.bufSize;
   qError("group cache block cache num:%d size:%" PRId64 , taosHashGetSize(pCache->pDirtyBlk), pCache->blkCacheSize);
 
   if (NULL == pCache->pDirtyHead) {
@@ -236,7 +199,7 @@ static int32_t addBlkToDirtyBufList(SGroupCacheOperatorInfo* pGCache, SGcDownstr
       pWriteHead = pCache->pDirtyHead;
       SGcBlkBufInfo* pTmp = pCache->pDirtyHead;
       while (NULL != pTmp) {
-        pCache->blkCacheSize -= pTmp->bufSize;
+        pCache->blkCacheSize -= pTmp->basic.bufSize;
         if (pCache->blkCacheSize <= pGCache->maxCacheSize) {
           pCache->pDirtyHead = pTmp->next;
           pTmp->next = NULL;
@@ -255,6 +218,17 @@ static int32_t addBlkToDirtyBufList(SGroupCacheOperatorInfo* pGCache, SGcDownstr
   return code;
 }
 
+
+static FORCE_INLINE void groupCacheSwitchNewFile(SGcFileCacheCtx* pFileCtx) {
+  if (pFileCtx->fileSize < GROUP_CACHE_DEFAULT_MAX_FILE_SIZE) {
+    return;
+  }
+  
+  pFileCtx->fileId++;
+  pFileCtx->fileSize = 0;
+}
+
+
 static int32_t addBlkToBufCache(struct SOperatorInfo* pOperator, SSDataBlock* pBlock, SGcDownstreamCtx* pCtx, SGroupCacheData* pGroup, SGcBlkBufInfo* pBufInfo) {
   SGroupCacheOperatorInfo* pGCache = pOperator->info;
   int64_t bufSize = blockDataGetSize(pBlock) + sizeof(int32_t) + taosArrayGetSize(pBlock->pDataBlock) * sizeof(int32_t);
@@ -265,14 +239,20 @@ static int32_t addBlkToBufCache(struct SOperatorInfo* pOperator, SSDataBlock* pB
   }
   blockDataToBuf(pBufInfo->pBuf, pBlock);
 
+  SGcFileCacheCtx* pFileCtx = pGCache->batchFetch ? &pCtx->fileCtx : &pGroup->pVgCtx->fileCtx;
+
   pBufInfo->next = NULL;
-  pBufInfo->blkId = atomic_add_fetch_64(&pGCache->currentBlkId, 1);
-  pBufInfo->fileId = pGroup->fileId;
-  pBufInfo->bufSize = bufSize;
-  pBufInfo->offset = atomic_fetch_add_64(&pGroup->pVgCtx->fileSize, bufSize);
+  pBufInfo->basic.blkId = atomic_add_fetch_64(&pGCache->currentBlkId, 1);
+  pBufInfo->basic.fileId = pGCache->batchFetch ? pFileCtx->fileId : pGroup->fileId;
+  pBufInfo->basic.bufSize = bufSize;
+  pBufInfo->basic.offset = atomic_fetch_add_64(&pFileCtx->fileSize, bufSize);
   pBufInfo->pCtx = pCtx;
   pBufInfo->pGroup = pGroup;
 
+  if (pGCache->batchFetch) {    
+    groupCacheSwitchNewFile(pFileCtx);
+  }
+
   int32_t code = addBlkToDirtyBufList(pGCache, pCtx, pGroup->pVgCtx, &pGCache->blkCache, pBufInfo);
 
   return code;
@@ -340,98 +320,38 @@ static int32_t buildGroupCacheResultBlock(SGroupCacheOperatorInfo* pGCache, int3
   return blockDataFromBuf(*ppRes, pBuf);
 }
 
-static int32_t acquireDownstreamFileFd(SGcDownstreamCtx* pCtx, SGroupCacheFileFd** ppFd) {
-  if (NULL == pCtx->cacheFileFd.fd) {
-    pCtx->cacheFileFd.fd = taosOpenFile(pCtx->baseFilename, TD_FILE_CREATE|TD_FILE_READ|TD_FILE_WRITE|TD_FILE_AUTO_DEL);
-    if (NULL == pCtx->cacheFileFd.fd) {
-      return TAOS_SYSTEM_ERROR(errno);
-    }
-    pCtx->cacheFileFdNum = 1;
-    taosThreadMutexInit(&pCtx->cacheFileFd.mutex, NULL);
-  } else {
-    taosThreadMutexLock(&pCtx->cacheFileFd.mutex);
-  }
-
-  *ppFd = &pCtx->cacheFileFd;
-  return TSDB_CODE_SUCCESS;
-}
-
-static int32_t readBatchBlocksFromDisk(SGroupCacheOperatorInfo* pGCache, SGroupCacheData* pGrp, SGcBlkBufBasic* pBasic, void** ppBuf) {
-  TdFilePtr cacheFileFd = NULL;
-  SGcDownstreamCtx* pCtx = &pGCache->pDownstreams[pGrp->downstreamIdx];
-  int32_t code = acquireDownstreamFileFd(pCtx, &cacheFileFd);
+static int32_t readBlockFromDisk(SGroupCacheOperatorInfo* pGCache, SGroupCacheData* pGrp, SGcBlkBufBasic* pBasic, void** ppBuf) {
+  SGroupCacheFileFd *pFileFd = NULL;
+  SGcFileCacheCtx* pFileCtx = pGCache->batchFetch ? &pGCache->pDownstreams[pGrp->downstreamIdx].fileCtx : &pGrp->pVgCtx->fileCtx;
+  int32_t code = acquireFdFromFileCtx(pFileCtx, pBasic->fileId, &pFileFd);
   if (code) {
     return code;
   }
-  int32_t ret = taosLSeekFile(cacheFileFd, pBasic->offset, SEEK_SET);
+  int32_t ret = taosLSeekFile(pFileFd->fd, pBasic->offset, SEEK_SET);
   if (ret == -1) {
-    return TAOS_SYSTEM_ERROR(errno);
+    code = TAOS_SYSTEM_ERROR(errno);
+    goto _return;
   }
 
   *ppBuf = taosMemoryMalloc(pBasic->bufSize);
   if (NULL == *ppBuf) {
-    releaseDownstreamFileFd();
-    return TSDB_CODE_OUT_OF_MEMORY;
+    code = TSDB_CODE_OUT_OF_MEMORY;
+    goto _return;
   }
   
-  ret = (int32_t)taosReadFile(cacheFileFd, *ppBuf, pBasic->bufSize);
+  ret = (int32_t)taosReadFile(pFileFd->fd, *ppBuf, pBasic->bufSize);
   if (ret != pBasic->bufSize) {
     taosMemoryFreeClear(*ppBuf);
-    return TAOS_SYSTEM_ERROR(errno);
+    code = TAOS_SYSTEM_ERROR(errno);
+    goto _return;
   }
 
-  releaseDownstreamFileFd();
-  return code;
-}
+  qTrace("FileId %u, blk %" PRIu64 " size %" PRIu64 " read from offset %" PRIu64, 
+      pBasic->fileId, pBasic->blkId, pBasic->offset, pBasic->bufSize);
 
+_return:
 
-static int32_t readSeqBlocksFromDisk(SGroupCacheOperatorInfo* pGCache, SGcBlkBufInfo* pHead) {
-  int32_t code = TSDB_CODE_SUCCESS;
-
-  SGroupCacheFileFd* pFd = NULL;
-  while (NULL != pHead) {
-    code = acquireVgroupFileFd(pGCache, pHead->pCtx, pHead->pGroup->pVgCtx, pHead->fileId, &pFd);
-    if (TSDB_CODE_SUCCESS != code) {
-      return code;
-    }
-
-    int32_t ret = taosLSeekFile(pFd->fd, pHead->basic.offset, SEEK_SET);
-    if (ret == -1) {
-      code= TAOS_SYSTEM_ERROR(errno);
-      return code;
-    }
-    
-    code = (int32_t)taosWriteFile(pFd->fd, pHead->pBuf, pHead->basic.bufSize);
-    releaseVgroupFileFd(pFd);
-    if (code != pHead->basic.bufSize) {
-      code= TAOS_SYSTEM_ERROR(errno);
-      return code;
-    }
-
-    taosWLockLatch(&pHead->pGroup->batchList.lock);
-    taosArrayPush(pHead->pGroup->batchList.pList, &pHead->basic);
-    taosWUnLockLatch(&pHead->pGroup->batchList.lock);
-
-    
-    int64_t blkId = pHead->basic.blkId;
-    pHead = pHead->next;
-    
-    taosHashRemove(pGCache->blkCache.pDirtyBlk, &blkId, sizeof(blkId));
-  }
-
-  return code;
-}
-
-
-static int32_t readBlockFromDisk(SGroupCacheOperatorInfo* pGCache, SGroupCacheData* pGrp, SGcBlkBufBasic* pBasic, void** ppRes) {
-  int32_t code = TSDB_CODE_SUCCESS;
-  
-  if (pGCache->batchFetch) {
-    code = readBatchBlocksFromDisk(pGCache, pGrp, pBasic, ppRes);
-  } else {
-    code = readSeqBlocksFromDisk(pGCache, pGrp, pBasic, ppRes);
-  }
-
+  releaseFdToFileCtx(pFileFd);
   return code;
 }
 
@@ -440,7 +360,6 @@ static int32_t retrieveBlkFromBufCache(SGroupCacheOperatorInfo* pGCache, SGroupC
   SGcBlkCacheInfo* pCache = &pGCache->blkCache;
   void* pBuf = NULL;
 
-  taosRLockLatch(&pCache->dirtyLock);
   SGcBlkBufInfo* pBufInfo = taosHashAcquire(pCache->pDirtyBlk, &pBasic->blkId, sizeof(pBasic->blkId));
   if (NULL == pBufInfo) {
     code = readBlockFromDisk(pGCache, pGrp, pBasic, &pBuf);
@@ -452,7 +371,11 @@ static int32_t retrieveBlkFromBufCache(SGroupCacheOperatorInfo* pGCache, SGroupC
   }
   
   code = buildGroupCacheResultBlock(pGCache, pGrp->downstreamIdx, pBuf, ppRes);
-  taosRUnLockLatch(&pCache->dirtyLock);
+  taosHashRelease(pCache->pDirtyBlk, pBufInfo);
+  if (NULL == pBufInfo) {
+    taosMemoryFree(pBuf);
+  }
+  
   if (code) {
     return code;
   }
@@ -461,16 +384,16 @@ static int32_t retrieveBlkFromBufCache(SGroupCacheOperatorInfo* pGCache, SGroupC
   return TSDB_CODE_SUCCESS;
 }
 
-static FORCE_INLINE void initGcVgroupCtx(SGcVgroupCtx* pVgCtx, int32_t downstreamId, int32_t vgId, SArray* pTbList) {
+static FORCE_INLINE void initGcVgroupCtx(SOperatorInfo* pOperator, SGcVgroupCtx* pVgCtx, int32_t downstreamId, int32_t vgId, SArray* pTbList) {
   pVgCtx->pTbList = pTbList;
   
-  snprintf(pVgCtx->baseFilename, sizeof(pVgCtx->baseFilename) - 1, "%s/gc_%d_%s_%d_%d", tsTempDir, getpid(), GET_TASKID(pOperator->pTaskInfo), downstreamId, vgId);
-  pVgCtx->baseFilename[sizeof(pVgCtx->baseFilename) - 1] = 0;
+  snprintf(pVgCtx->fileCtx.baseFilename, sizeof(pVgCtx->fileCtx.baseFilename) - 1, "%s/gc_%d_%s_%d_%d", tsTempDir, getpid(), GET_TASKID(pOperator->pTaskInfo), downstreamId, vgId);
+  pVgCtx->fileCtx.baseFilename[sizeof(pVgCtx->fileCtx.baseFilename) - 1] = 0;
 
-  pVgCtx->baseNameLen = strlen(pVgCtx->baseFilename);
+  pVgCtx->fileCtx.baseNameLen = strlen(pVgCtx->fileCtx.baseFilename);
 }
 
-static int32_t addNewGroupToVgHash(SSHashObj* pHash, SGcNewGroupInfo* pNew) {
+static int32_t addNewGroupToVgHash(SOperatorInfo* pOperator, SSHashObj* pHash, SGcNewGroupInfo* pNew) {
   SGcVgroupCtx* pVgCtx = pNew->pGroup->pVgCtx;
   if (NULL == pVgCtx) {
     SArray* pList = taosArrayInit(10, sizeof(*pNew));
@@ -479,7 +402,7 @@ static int32_t addNewGroupToVgHash(SSHashObj* pHash, SGcNewGroupInfo* pNew) {
     }
     taosArrayPush(pList, pNew);
     SGcVgroupCtx vgCtx = {0};
-    initGcVgroupCtx(&vgCtx, pNew->pGroup->downstreamIdx, pNew->vgId, pList);
+    initGcVgroupCtx(pOperator, &vgCtx, pNew->pGroup->downstreamIdx, pNew->vgId, pList);
     tSimpleHashPut(pHash, &pNew->vgId, sizeof(pNew->vgId), &vgCtx, sizeof(vgCtx));
     pNew->pGroup->pVgCtx = tSimpleHashGet(pHash, &pNew->vgId, sizeof(pNew->vgId));
     return TSDB_CODE_SUCCESS;
@@ -504,7 +427,7 @@ static FORCE_INLINE int32_t appendNewGroupToDownstream(struct SOperatorInfo* pOp
   for (int32_t i = 0; i < num; ++i) {
     SGcNewGroupInfo* pNew = taosArrayGet(pCtx->pNewGrpList, i);
     if (!pGCache->batchFetch) {
-      code = addNewGroupToVgHash(pCtx->pVgTbHash, pNew);
+      code = addNewGroupToVgHash(pOperator, pCtx->pVgTbHash, pNew);
       if (code) {
         goto _return;
       }
@@ -586,29 +509,13 @@ static FORCE_INLINE void handleGroupFetchDone(SGroupCacheData* pGroup) {
   taosThreadMutexUnlock(&pGroup->mutex);
 }
 
-static int32_t vgroupSwitchNewFile(SGcVgroupCtx* pVgCtx) {
-  if (NULL != pVgCtx->cacheFileFd) {
-    if (NULL == pVgCtx->pCacheFile) {
-      pVgCtx->pCacheFile = tSimpleHashInit(10, taosGetDefaultHashFunction(TSDB_DATA_TYPE_INT));
-      if (NULL == pVgCtx->pCacheFile) {
-        return TSDB_CODE_OUT_OF_MEMORY;
-      }
-    }
-    tSimpleHashPut(pVgCtx->pCacheFile, &pVgCtx->fileId, sizeof(pVgCtx->fileId), &pVgCtx->cacheFileFd, sizeof(pVgCtx->cacheFileFd));
-  }
-  
-  pVgCtx->fileId++;
-  pVgCtx->fileSize = 0;
-  return TSDB_CODE_SUCCESS;
-}
-
 static int32_t handleVgroupTableFetchDone(SGcDownstreamCtx* pCtx, SGroupCacheData* pGroup, uint64_t uid) {
-  if (pCtx->lastBlkUid == uid || pGroup->pVgCtx->lastUid == uid) {
+  if (pCtx->lastBlkUid == uid || pGroup->pVgCtx->lastBlkUid == uid) {
     return TSDB_CODE_SUCCESS;
   }
   
   pCtx->lastBlkUid = uid;
-  pGroup->pVgCtx->lastUid = uid;
+  pGroup->pVgCtx->lastBlkUid = uid;
   
   int32_t i = 0;
   while (true) {
@@ -619,15 +526,10 @@ static int32_t handleVgroupTableFetchDone(SGcDownstreamCtx* pCtx, SGroupCacheDat
     handleGroupFetchDone(pNew->pGroup);
   }
 
-  if (pGroup->pVgCtx->fileSize >= GROUP_CACHE_DEFAULT_MAX_FILE_SIZE) {
-    int32_t code = vgroupSwitchNewFile(pGroup->pVgCtx);
-    if (TSDB_CODE_SUCCESS != code) {
-      return code;
-    }
-  }
+  groupCacheSwitchNewFile(&pGroup->pVgCtx->fileCtx);
 
-  pGroup->fileId = pGroup->pVgCtx->fileId;
-  pGroup->startOffset = pGroup->pVgCtx->fileSize;
+  pGroup->fileId = pGroup->pVgCtx->fileCtx.fileId;
+  pGroup->startOffset = pGroup->pVgCtx->fileCtx.fileSize;
 
   return TSDB_CODE_SUCCESS;
 }
@@ -637,15 +539,8 @@ static FORCE_INLINE void initNewGroupData(SGcDownstreamCtx* pCtx, SGroupCacheDat
   taosThreadMutexInit(&pGroup->mutex, NULL);
   pGroup->downstreamIdx = downstreamIdx;
   pGroup->vgId = vgId;
-  if (batchFetch) {
-    pGroup->fileId = 0;
-    pGroup->batchList.pList = taosArrayInit(10, POINTER_BYTES);
-  } else {
-    pGroup->fileId = -1;
-    pGroup->seqList.startBlkId = -1;
-    pGroup->seqList.endBlkId = -1;
-
-  }
+  pGroup->fileId = -1;
+  pGroup->blkList.pList = taosArrayInit(10, sizeof(SGcBlkBufBasic));
   pGroup->startOffset = -1;
   pGroup->pVgCtx = tSimpleHashGet(pCtx->pVgTbHash, &pGroup->vgId, sizeof(pGroup->vgId));
 }
@@ -691,18 +586,14 @@ static int32_t addNewGroupData(struct SOperatorInfo* pOperator, SOperatorParam*
   return TSDB_CODE_SUCCESS;
 }
 
-static int32_t addBlkToGroupCache(bool batchFetch, SGroupCacheData* pGroup, SGcBlkBufInfo* pNewBlk, int32_t* pIdx) {
-  taosWLockLatch(&pGroup->batchList.lock);
-  if (batchFetch) {
-    taosArrayPush(pGroup->batchList.pList, &pNewBlk->basic);
-  } else {
-    taosArrayPush(pGroup->batchList.pList, &pNewBlk->basic.offset);
-  }
+static int32_t addBlkToGroupCache(bool batchFetch, SGroupCacheData* pGroup, SGcBlkBufInfo* pNewBlk, int64_t* pIdx) {
+  taosWLockLatch(&pGroup->blkList.lock);
+  taosArrayPush(pGroup->blkList.pList, &pNewBlk->basic);
+  *pIdx = taosArrayGetSize(pGroup->blkList.pList) - 1;
+  taosWUnLockLatch(&pGroup->blkList.lock);
 
-  *pIdx = taosArrayGetSize(pGroup->batchList.pList) - 1;
+  qError("block added to group cache, total block num:%" PRId64, *pIdx + 1);
   
-  qError("block added to group cache, total block num:%" PRId64, (int64_t)taosArrayGetSize(pGroup->batchList.pList));
-  taosWUnLockLatch(&pGroup->batchList.lock);
   return TSDB_CODE_SUCCESS;
 }
 
@@ -835,25 +726,25 @@ static int32_t getBlkFromSessionCacheImpl(struct SOperatorInfo* pOperator, int64
   SGroupCacheOperatorInfo* pGCache = pOperator->info;
   *got = true;
   
-  SGroupBatchBlkList* pBatchList = &pSession->pGroupData->batchList;
-  taosRLockLatch(&pBatchList->lock);
-  int64_t blkNum = taosArrayGetSize(pBatchList->pList);
+  SGcBlkList* pBlkList = &pSession->pGroupData->blkList;
+  taosRLockLatch(&pBlkList->lock);
+  int64_t blkNum = taosArrayGetSize(pBlkList->pList);
   if (pSession->lastBlkId < 0) {
     if (blkNum > 0) {
-      SGcBlkBufBasic* pBasic = taosArrayGet(pBatchList->pList, 0);
-      taosRUnLockLatch(&pBatchList->lock);
+      SGcBlkBufBasic* pBasic = taosArrayGet(pBlkList->pList, 0);
+      taosRUnLockLatch(&pBlkList->lock);
       code = retrieveBlkFromBufCache(pGCache, pSession->pGroupData, sessionId, pBasic, ppRes);
       pSession->lastBlkId = 0;
       return code;
     }
   } else if ((pSession->lastBlkId + 1) < blkNum) {
-    SGcBlkBufBasic* pBasic = taosArrayGet(pBatchList->pList, pSession->lastBlkId + 1);
-    taosRUnLockLatch(&pBatchList->lock);
+    SGcBlkBufBasic* pBasic = taosArrayGet(pBlkList->pList, pSession->lastBlkId + 1);
+    taosRUnLockLatch(&pBlkList->lock);
     code = retrieveBlkFromBufCache(pGCache, pSession->pGroupData, sessionId, pBasic, ppRes);
     pSession->lastBlkId++;
     return code;
   }
-  taosRUnLockLatch(&pBatchList->lock);
+  taosRUnLockLatch(&pBlkList->lock);
 
   if (atomic_load_8((int8_t*)&pSession->pGroupData->fetchDone)) {
     *ppRes = NULL;
@@ -950,6 +841,10 @@ _return:
   return code;
 }
 
+void freeGcBlkBufInfo(void* ptr) {
+  SGcBlkBufInfo* pBlk = (SGcBlkBufInfo*)ptr;
+  taosMemoryFree(pBlk->pBuf);
+}
 
 static int32_t initGroupCacheBlockCache(SGroupCacheOperatorInfo* pInfo) {
   SGcBlkCacheInfo* pCache = &pInfo->blkCache;
@@ -957,7 +852,7 @@ static int32_t initGroupCacheBlockCache(SGroupCacheOperatorInfo* pInfo) {
   if (NULL == pCache->pDirtyBlk) {
     return TSDB_CODE_OUT_OF_MEMORY;
   }
-  taosHashSetFreeFp(pCache->pDirtyBlk,,,,,,,,);
+  taosHashSetFreeFp(pCache->pDirtyBlk, freeGcBlkBufInfo);
   pCache->pReadBlk = taosHashInit(10, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BIGINT), false, HASH_ENTRY_LOCK);
   if (NULL == pCache->pReadBlk) {
     return TSDB_CODE_OUT_OF_MEMORY;
@@ -1057,7 +952,7 @@ static int32_t initGroupCacheDownstreamCtx(SOperatorInfo*          pOperator) {
     if (pInfo->batchFetch) {
       int32_t defaultVg = 0;
       SGcVgroupCtx vgCtx = {0};
-      initGcVgroupCtx(&vgCtx, pCtx->id, defaultVg, NULL);      
+      initGcVgroupCtx(pOperator, &vgCtx, pCtx->id, defaultVg, NULL);      
       tSimpleHashPut(pCtx->pVgTbHash, &defaultVg, sizeof(defaultVg), &vgCtx, sizeof(vgCtx));
     }
     
@@ -1087,8 +982,9 @@ static int32_t initGroupCacheDownstreamCtx(SOperatorInfo*          pOperator) {
       return TSDB_CODE_OUT_OF_MEMORY;
     }
 
-    snprintf(pCtx->baseFilename, sizeof(pCtx->baseFilename) - 1, "%s/gc_%d_%s_%d", tsTempDir, getpid(), GET_TASKID(pOperator->pTaskInfo), pCtx->id);
-    pCtx->baseFilename[sizeof(pCtx->baseFilename) - 1] = 0;
+    snprintf(pCtx->fileCtx.baseFilename, sizeof(pCtx->fileCtx.baseFilename) - 1, "%s/gc_%d_%s_%d", tsTempDir, getpid(), GET_TASKID(pOperator->pTaskInfo), pCtx->id);
+    pCtx->fileCtx.baseFilename[sizeof(pCtx->fileCtx.baseFilename) - 1] = 0;
+    pCtx->fileCtx.baseNameLen = strlen(pCtx->fileCtx.baseFilename);
   }
 
   return TSDB_CODE_SUCCESS;