diff --git a/dbms/src/Storages/Page/V3/BlobStore.cpp b/dbms/src/Storages/Page/V3/BlobStore.cpp
index 19614f4975b..3ed1d1a69b1 100644
--- a/dbms/src/Storages/Page/V3/BlobStore.cpp
+++ b/dbms/src/Storages/Page/V3/BlobStore.cpp
@@ -1240,9 +1240,9 @@ BlobStatPtr BlobStore::BlobStats::createBigPageStatNotChecking(BlobFileId blob_f
     BlobStatPtr stat = std::make_shared<BlobStat>(
         blob_file_id,
         SpaceMap::SpaceMapType::SMAP64_BIG,
-        config.file_limit_size);
+        config.file_limit_size,
+        BlobStatType::BIG_BLOB);
 
-    stat->changeToBigBlob();
     PageFileIdAndLevel id_lvl{blob_file_id, 0};
     stats_map[delegator->choosePath(id_lvl)].emplace_back(stat);
     return stat;
diff --git a/dbms/src/Storages/Page/V3/BlobStore.h b/dbms/src/Storages/Page/V3/BlobStore.h
index 499a1f6c038..b5cf5a677f1 100644
--- a/dbms/src/Storages/Page/V3/BlobStore.h
+++ b/dbms/src/Storages/Page/V3/BlobStore.h
@@ -110,12 +110,15 @@ class BlobStore : private Allocator<false>
             double sm_valid_rate = 1.0;
 
         public:
-            BlobStat(BlobFileId id_, SpaceMap::SpaceMapType sm_type, UInt64 sm_max_caps_)
+            BlobStat(BlobFileId id_, SpaceMap::SpaceMapType sm_type, UInt64 sm_max_caps_, BlobStatType type_ = BlobStatType::NORMAL)
                 : id(id_)
-                , type(BlobStatType::NORMAL)
+                , type(type_)
                 , smap(SpaceMap::createSpaceMap(sm_type, 0, sm_max_caps_))
                 , sm_max_caps(sm_max_caps_)
-            {}
+            {
+                // Won't create read-only blob by default.
+                assert(type != BlobStatType::READ_ONLY);
+            }
 
             [[nodiscard]] std::lock_guard<std::mutex> lock()
             {
@@ -142,11 +145,6 @@ class BlobStore : private Allocator<false>
                 return type.load() == BlobStatType::BIG_BLOB;
             }
 
-            void changeToBigBlob()
-            {
-                type.store(BlobStatType::BIG_BLOB);
-            }
-
             BlobFileOffset getPosFromStat(size_t buf_size, const std::lock_guard<std::mutex> &);
 
             bool removePosFromStat(BlobFileOffset offset, size_t buf_size, const std::lock_guard<std::mutex> &);