diff --git a/internal/kv/rocksdb/rocksdb_kv.go b/internal/kv/rocksdb/rocksdb_kv.go
index 1d4b5a50ec..e0d30aa2ca 100644
--- a/internal/kv/rocksdb/rocksdb_kv.go
+++ b/internal/kv/rocksdb/rocksdb_kv.go
@@ -29,7 +29,7 @@ type RocksdbKV struct {
 
 const (
 	// LRUCacheSize is the lru cache size of rocksdb, default 3 << 30
-	LRUCacheSize = 3 << 30
+	LRUCacheSize = 512 * 1024 * 1024
 )
 
 // NewRocksdbKV returns a rockskv object
diff --git a/internal/util/rocksmq/server/rocksmq/rocksmq_impl.go b/internal/util/rocksmq/server/rocksmq/rocksmq_impl.go
index f1137972a8..7d00cc8061 100644
--- a/internal/util/rocksmq/server/rocksmq/rocksmq_impl.go
+++ b/internal/util/rocksmq/server/rocksmq/rocksmq_impl.go
@@ -38,7 +38,7 @@ var RocksmqPageSize int64 = 2 << 30
 const (
 	DefaultMessageID        = "-1"
 	FixedChannelNameLen     = 320
-	RocksDBLRUCacheCapacity = 3 << 30
+	RocksDBLRUCacheCapacity = 512 * 1024 * 1024
 
 	kvSuffix = "_meta_kv"