diff --git a/deps/oblib/src/common/ob_string_buf.h b/deps/oblib/src/common/ob_string_buf.h
index 17499f856f..b30046fcd6 100644
--- a/deps/oblib/src/common/ob_string_buf.h
+++ b/deps/oblib/src/common/ob_string_buf.h
@@ -34,6 +34,10 @@ public:
   explicit ObStringBufT(const lib::ObLabel &label = ObModIds::OB_STRING_BUF,
                         const int64_t block_size = DEF_MEM_BLOCK_SIZE)
     : ObStringBufT(lib::ObMemAttr(OB_SERVER_TENANT_ID, label), block_size) {}
+  explicit ObStringBufT(const int64_t tenant_id,
+                        const lib::ObLabel &label = ObModIds::OB_STRING_BUF,
+                        const int64_t block_size = DEF_MEM_BLOCK_SIZE)
+    : ObStringBufT(lib::ObMemAttr(tenant_id, label), block_size) {}
   explicit ObStringBufT(PageArenaT &arena);
   ~ObStringBufT();
   int reset();
diff --git a/src/sql/session/ob_session_val_map.cpp b/src/sql/session/ob_session_val_map.cpp
index 4afc35118f..e40587e7e7 100644
--- a/src/sql/session/ob_session_val_map.cpp
+++ b/src/sql/session/ob_session_val_map.cpp
@@ -43,8 +43,8 @@ ObSessionValMap::ObSessionValMap(const int64_t block_size,
     : block_allocator_(SMALL_BLOCK_SIZE, common::OB_MALLOC_NORMAL_BLOCK_SIZE,
                        ObMalloc(ObMemAttr(tenant_id, ObModIds::OB_SQL_SESSION_VAR_MAP))),
     var_name_val_map_allocer_(block_size, block_allocator),
-    str_buf1_(ObModIds::OB_SQL_SESSION_VAR_MAP),
-    str_buf2_(ObModIds::OB_SQL_SESSION_VAR_MAP),
+    str_buf1_(tenant_id, ObModIds::OB_SQL_SESSION_VAR_MAP),
+    str_buf2_(tenant_id, ObModIds::OB_SQL_SESSION_VAR_MAP),
     current_buf_index_(0),
     bucket_allocator_(ObMemAttr(tenant_id, ObModIds::OB_SQL_SESSION_VAR_MAP)),
     bucket_allocator_wrapper_(&bucket_allocator_),