diff --git a/src/tsdb/inc/tsdbMain.h b/src/tsdb/inc/tsdbMain.h
index e06778a8720b2c73d017c52b41c1ca3567059e76..9601bbadfec3303212d5cdbc665002c96e38d57e 100644
--- a/src/tsdb/inc/tsdbMain.h
+++ b/src/tsdb/inc/tsdbMain.h
@@ -161,7 +161,7 @@ typedef struct {
   int64_t index;
   int     numOfCacheBlocks;
   SList * memPool;
-} STsdbCachePool;
+} STsdbBufferPool;
 
 typedef struct {
   TSKEY   keyFirst;
@@ -173,7 +173,7 @@ typedef struct {
 typedef struct {
   int              cacheBlockSize;
   int              totalCacheBlocks;
-  STsdbCachePool   pool;
+  STsdbBufferPool   pool;
   STsdbCacheBlock *curBlock;
   SCacheMem *      mem;
   SCacheMem *      imem;
diff --git a/src/tsdb/src/tsdbCache.c b/src/tsdb/src/tsdbCache.c
index edc8472b34661fa616dcd352258249902e711a71..24476d89975bd420f53d7a40ac1cb6dd0c961bf0 100644
--- a/src/tsdb/src/tsdbCache.c
+++ b/src/tsdb/src/tsdbCache.c
@@ -35,7 +35,7 @@ STsdbCache *tsdbInitCache(int cacheBlockSize, int totalBlocks, TsdbRepoT *pRepo)
   pCache->totalCacheBlocks = totalBlocks;
   pCache->pRepo = pRepo;
 
-  STsdbCachePool *pPool = &(pCache->pool);
+  STsdbBufferPool *pPool = &(pCache->pool);
   pPool->index = 0;
   pPool->memPool = tdListNew(sizeof(STsdbCacheBlock *));
   if (pPool->memPool == NULL) goto _err;
@@ -106,7 +106,7 @@ static void tsdbFreeCacheMem(SCacheMem *mem) {
 }
 
 static int tsdbAllocBlockFromPool(STsdbCache *pCache) {
-  STsdbCachePool *pPool = &(pCache->pool);
+  STsdbBufferPool *pPool = &(pCache->pool);
   
   tsdbLockRepo(pCache->pRepo);
   if (listNEles(pPool->memPool) == 0) {
@@ -170,7 +170,7 @@ int tsdbAlterCacheTotalBlocks(STsdbRepo *pRepo, int totalBlocks) {
 }
 
 static int tsdbAddCacheBlockToPool(STsdbCache *pCache) {
-  STsdbCachePool *pPool = &pCache->pool;
+  STsdbBufferPool *pPool = &pCache->pool;
 
   STsdbCacheBlock *pBlock = malloc(sizeof(STsdbCacheBlock) + pCache->cacheBlockSize);
   if (pBlock == NULL) return -1;
@@ -184,7 +184,7 @@ static int tsdbAddCacheBlockToPool(STsdbCache *pCache) {
 }
 
 static int tsdbRemoveCacheBlockFromPool(STsdbCache *pCache) {
-  STsdbCachePool *pPool = &pCache->pool;
+  STsdbBufferPool *pPool = &pCache->pool;
   STsdbCacheBlock *pBlock = NULL;
 
   ASSERT(pCache->totalCacheBlocks >= 0);