diff --git a/src/storage/blocksstable/ob_tmp_file_store.cpp b/src/storage/blocksstable/ob_tmp_file_store.cpp
index 81bfb2ff6b..357a804784 100644
--- a/src/storage/blocksstable/ob_tmp_file_store.cpp
+++ b/src/storage/blocksstable/ob_tmp_file_store.cpp
@@ -743,7 +743,7 @@ ObTmpTenantMacroBlockManager::~ObTmpTenantMacroBlockManager()
 int ObTmpTenantMacroBlockManager::init(common::ObIAllocator &allocator)
 {
   int ret = OB_SUCCESS;
-  auto attr = SET_USE_500(ObModIds::OB_TMP_BLOCK_MAP);
+  ObMemAttr attr = SET_USE_500(ObModIds::OB_TMP_BLOCK_MAP);
   if (IS_INIT) {
     ret = OB_INIT_TWICE;
     STORAGE_LOG(WARN, "ObTmpMacroBlockManager has been inited", K(ret));
@@ -1564,7 +1564,7 @@ ObTmpFileStore::~ObTmpFileStore()
 int ObTmpFileStore::init()
 {
   int ret = OB_SUCCESS;
-  auto attr = SET_USE_500(ObModIds::OB_TMP_FILE_STORE_MAP);
+  ObMemAttr attr = SET_USE_500(ObModIds::OB_TMP_FILE_STORE_MAP);
   if (IS_INIT) {
     ret = OB_INIT_TWICE;
     STORAGE_LOG(WARN, "ObTmpFileStore has not been inited", K(ret));
diff --git a/src/storage/ob_disk_usage_reporter.cpp b/src/storage/ob_disk_usage_reporter.cpp
index 3cca29aac3..9661bb0de7 100644
--- a/src/storage/ob_disk_usage_reporter.cpp
+++ b/src/storage/ob_disk_usage_reporter.cpp
@@ -154,20 +154,10 @@ int ObDiskUsageReportTask::report_tenant_disk_usage(const char *svr_ip,
   // to reduce the locking time of the result_map_,
   // copy the value to array and then update the usage table,
   ObArray<hash::HashMapPair<ObDiskUsageReportKey, int64_t>> result_arr;
-  ObFunction<int(const hash::HashMapPair<ObDiskUsageReportKey, int64_t> &pair)> copy_result =
-      [&result_arr](const hash::HashMapPair<ObDiskUsageReportKey, int64_t> &pair) {
-    int ret = OB_SUCCESS;
-    if (OB_FAIL(result_arr.push_back(pair))) {
-      STORAGE_LOG(WARN, "failed to push back pair", K(ret));
-    }
-    return ret;
-  };
+  ObReportResultGetter copy_result(result_arr);
 
   if (OB_FAIL(ret)) {
     // do nothing
-  } else if (!copy_result.is_valid()) {
-    ret = OB_ERR_UNEXPECTED;
-    STORAGE_LOG(WARN, "copy_func invalid", K(ret));
   } else if (OB_FAIL(result_map_.foreach_refactored(copy_result))) {
     STORAGE_LOG(WARN, "fail to copy result", K(ret));
   }
diff --git a/src/storage/ob_disk_usage_reporter.h b/src/storage/ob_disk_usage_reporter.h
index ab2615ff3d..24980b4fc8 100644
--- a/src/storage/ob_disk_usage_reporter.h
+++ b/src/storage/ob_disk_usage_reporter.h
@@ -69,6 +69,27 @@ public:
   int get_data_disk_used_size(const uint64_t tenant_id, int64_t &used_size) const;
   int get_clog_disk_used_size(const uint64_t tenant_id, int64_t &used_size) const;
 
+private:
+  class ObReportResultGetter final
+  {
+  public:
+    explicit ObReportResultGetter(ObArray<hash::HashMapPair<ObDiskUsageReportKey, int64_t>> &result_arr)
+      : result_arr_(result_arr)
+    {}
+    ~ObReportResultGetter() = default;
+    int operator()(const hash::HashMapPair<ObDiskUsageReportKey, int64_t> &pair)
+    {
+      int ret = OB_SUCCESS;
+      if (OB_FAIL(result_arr_.push_back(pair))) {
+        STORAGE_LOG(WARN, "failed to push back pair", K(ret));
+      }
+      return ret;
+    }
+  private:
+    ObArray<hash::HashMapPair<ObDiskUsageReportKey, int64_t>> &result_arr_;
+    DISALLOW_COPY_AND_ASSIGN(ObReportResultGetter);
+  };
+
 private:
   int report_tenant_disk_usage(const char *svr_ip, const int32_t svr_port, const int64_t seq_num);
   int refresh_tenant_disk_usage();