diff --git a/include/common/tglobal.h b/include/common/tglobal.h
index 157e37f080bd730c0a08f1bc622a6c0089eb50cd..ced94e0f11a4410e971c4ca8f1ccf71a05041c46 100644
--- a/include/common/tglobal.h
+++ b/include/common/tglobal.h
@@ -29,7 +29,6 @@ extern "C" {
 #define SLOW_LOG_TYPE_OTHERS 0x4
 #define SLOW_LOG_TYPE_ALL    0xFFFFFFFF
 
-
 // cluster
 extern char     tsFirst[];
 extern char     tsSecond[];
@@ -181,6 +180,7 @@ extern bool    tsDisableStream;
 extern int64_t tsStreamBufferSize;
 extern int64_t tsCheckpointInterval;
 extern bool    tsFilterScalarMode;
+extern int32_t tsMaxStreamBackendCache;
 
 // #define NEEDTO_COMPRESSS_MSG(size) (tsCompressMsgSize != -1 && (size) > tsCompressMsgSize)
 
diff --git a/source/common/src/tglobal.c b/source/common/src/tglobal.c
index c648f8551ae8bd8948b618a3c3671aa50d469299..c5646d92d1ee23000e5848129a81249c16737dd8 100644
--- a/source/common/src/tglobal.c
+++ b/source/common/src/tglobal.c
@@ -60,6 +60,7 @@ int32_t tsNumOfQnodeQueryThreads = 4;
 int32_t tsNumOfQnodeFetchThreads = 1;
 int32_t tsNumOfSnodeStreamThreads = 4;
 int32_t tsNumOfSnodeWriteThreads = 1;
+int32_t tsMaxStreamBackendCache = 128;  // M
 
 // sync raft
 int32_t tsElectInterval = 25 * 1000;
@@ -105,7 +106,7 @@ int32_t tsQueryPolicy = 1;
 int32_t tsQueryRspPolicy = 0;
 int64_t tsQueryMaxConcurrentTables = 200;  // unit is TSDB_TABLE_NUM_UNIT
 bool    tsEnableQueryHb = false;
-bool    tsEnableScience = false; // on taos-cli show float and doulbe with scientific notation if true 
+bool    tsEnableScience = false;  // on taos-cli show float and doulbe with scientific notation if true
 int32_t tsQuerySmaOptimize = 0;
 int32_t tsQueryRsmaTolerance = 1000;  // the tolerance time (ms) to judge from which level to query rsma data.
 bool    tsQueryPlannerTrace = false;
@@ -117,8 +118,8 @@ int32_t tsRedirectFactor = 2;
 int32_t tsRedirectMaxPeriod = 1000;
 int32_t tsMaxRetryWaitTime = 10000;
 bool    tsUseAdapter = false;
-int32_t tsMetaCacheMaxSize = -1; // MB
-int32_t tsSlowLogThreshold = 3; // seconds
+int32_t tsMetaCacheMaxSize = -1;  // MB
+int32_t tsSlowLogThreshold = 3;   // seconds
 int32_t tsSlowLogScope = SLOW_LOG_TYPE_ALL;
 
 /*
@@ -349,7 +350,8 @@ static int32_t taosAddClientCfg(SConfig *pCfg) {
   if (cfgAddInt32(pCfg, "maxRetryWaitTime", tsMaxRetryWaitTime, 0, 86400000, 0) != 0) return -1;
   if (cfgAddBool(pCfg, "useAdapter", tsUseAdapter, true) != 0) return -1;
   if (cfgAddBool(pCfg, "crashReporting", tsEnableCrashReport, true) != 0) return -1;
-  if (cfgAddInt64(pCfg, "queryMaxConcurrentTables", tsQueryMaxConcurrentTables, INT64_MIN, INT64_MAX, 1) != 0) return -1;
+  if (cfgAddInt64(pCfg, "queryMaxConcurrentTables", tsQueryMaxConcurrentTables, INT64_MIN, INT64_MAX, 1) != 0)
+    return -1;
   if (cfgAddInt32(pCfg, "metaCacheMaxSize", tsMetaCacheMaxSize, -1, INT32_MAX, 1) != 0) return -1;
   if (cfgAddInt32(pCfg, "slowLogThreshold", tsSlowLogThreshold, 0, INT32_MAX, true) != 0) return -1;
   if (cfgAddString(pCfg, "slowLogScope", "", true) != 0) return -1;
@@ -524,6 +526,7 @@ static int32_t taosAddServerCfg(SConfig *pCfg) {
   if (cfgAddInt32(pCfg, "cacheLazyLoadThreshold", tsCacheLazyLoadThreshold, 0, 100000, 0) != 0) return -1;
 
   if (cfgAddBool(pCfg, "filterScalarMode", tsFilterScalarMode, 0) != 0) return -1;
+  if (cfgAddInt32(pCfg, "maxStreamBackendCache", tsMaxStreamBackendCache, 16, 1024, 0) != 0) return -1;
 
   GRANT_CFG_ADD;
   return 0;
@@ -781,7 +784,7 @@ static int32_t taosSetClientCfg(SConfig *pCfg) {
   tsNumOfTaskQueueThreads = cfgGetItem(pCfg, "numOfTaskQueueThreads")->i32;
   tsQueryPolicy = cfgGetItem(pCfg, "queryPolicy")->i32;
   tsEnableQueryHb = cfgGetItem(pCfg, "enableQueryHb")->bval;
-  tsEnableScience = cfgGetItem(pCfg, "enableScience")->bval;  
+  tsEnableScience = cfgGetItem(pCfg, "enableScience")->bval;
   tsQuerySmaOptimize = cfgGetItem(pCfg, "querySmaOptimize")->i32;
   tsQueryPlannerTrace = cfgGetItem(pCfg, "queryPlannerTrace")->bval;
   tsQueryNodeChunkSize = cfgGetItem(pCfg, "queryNodeChunkSize")->i32;
@@ -902,7 +905,8 @@ static int32_t taosSetServerCfg(SConfig *pCfg) {
   tsCheckpointInterval = cfgGetItem(pCfg, "checkpointInterval")->i64;
 
   tsFilterScalarMode = cfgGetItem(pCfg, "filterScalarMode")->bval;
-  
+  tsMaxStreamBackendCache = cfgGetItem(pCfg, "maxStreamBackendCache")->i32;
+
   GRANT_CFG_GET;
   return 0;
 }
diff --git a/source/libs/stream/src/streamBackendRocksdb.c b/source/libs/stream/src/streamBackendRocksdb.c
index f7638a42ae7d79addd638f68b8601bdbc9161579..c8a6597badcbe1fa5124bbe8be9dd160516198f2 100644
--- a/source/libs/stream/src/streamBackendRocksdb.c
+++ b/source/libs/stream/src/streamBackendRocksdb.c
@@ -38,6 +38,15 @@ typedef struct {
   rocksdb_comparator_t**           pCompares;
 } RocksdbCfInst;
 
+uint32_t nextPow2(uint32_t x) {
+  x = x - 1;
+  x = x | (x >> 1);
+  x = x | (x >> 2);
+  x = x | (x >> 4);
+  x = x | (x >> 8);
+  x = x | (x >> 16);
+  return x + 1;
+}
 int32_t streamStateOpenBackendCf(void* backend, char* name, char** cfs, int32_t nCf);
 
 void destroyRocksdbCfInst(RocksdbCfInst* inst);
@@ -92,6 +101,8 @@ void* streamBackendInit(const char* path) {
   rocksdb_options_set_recycle_log_file_num(opts, 6);
   rocksdb_options_set_max_write_buffer_number(opts, 2);
   rocksdb_options_set_info_log_level(opts, 0);
+  uint32_t dbLimit = nextPow2(tsMaxStreamBackendCache);
+  rocksdb_options_set_db_write_buffer_size(opts, dbLimit << 20);
 
   pHandle->env = env;
   pHandle->dbOpt = opts;