diff --git a/src/inc/taosdef.h b/src/inc/taosdef.h
index 7696c91bdf5deb862c050486aafce257d26f7ae3..db0333a7c5e900a7ac8944e76a345bcb726e40bb 100644
--- a/src/inc/taosdef.h
+++ b/src/inc/taosdef.h
@@ -293,7 +293,7 @@ void tsDataSwap(void *pLeft, void *pRight, int32_t type, int32_t size);
 
 #define TSDB_MIN_TOTAL_BLOCKS           2
 #define TSDB_MAX_TOTAL_BLOCKS           10000
-#define TSDB_DEFAULT_TOTAL_BLOCKS       4
+#define TSDB_DEFAULT_TOTAL_BLOCKS       6
 
 #define TSDB_MIN_TABLES                 4
 #define TSDB_MAX_TABLES                 10000000
diff --git a/src/tsdb/src/tsdbMemTable.c b/src/tsdb/src/tsdbMemTable.c
index 1cd212b216d73c9824323c2c7e0e62a8188bd548..a51a1728960af6b2328f2da0ae5d6e48dc095057 100644
--- a/src/tsdb/src/tsdbMemTable.c
+++ b/src/tsdb/src/tsdbMemTable.c
@@ -172,7 +172,7 @@ void *tsdbAllocBytes(STsdbRepo *pRepo, int bytes) {
   STsdbBufBlock *pBufBlock = tsdbGetCurrBufBlock(pRepo);
 
   if (pBufBlock != NULL && pBufBlock->remain < bytes) {
-    if (listNEles(pRepo->mem->bufBlockList) >= pCfg->totalBlocks / 2) {  // need to commit mem
+    if (listNEles(pRepo->mem->bufBlockList) >= pCfg->totalBlocks / 3) {  // need to commit mem
       if (tsdbAsyncCommit(pRepo) < 0) return NULL;
     } else {
       if (tsdbLockRepo(pRepo) < 0) return NULL;