diff --git a/be/src/util/arrow/row_batch.h b/be/src/util/arrow/row_batch.h
index 68d03ffcb90108..b1ac280f695886 100644
--- a/be/src/util/arrow/row_batch.h
+++ b/be/src/util/arrow/row_batch.h
@@ -68,7 +68,7 @@ Status convert_to_arrow_batch(
 Status convert_to_row_batch(
     const arrow::RecordBatch& batch,
     const RowDescriptor& row_desc,
-    std::shared_ptr<MemTracker> tracker,
+    const std::shared_ptr<MemTracker>& tracker,
     std::shared_ptr<RowBatch>* result);
 
 Status serialize_record_batch(const arrow::RecordBatch& record_batch, std::string* result);
diff --git a/be/test/runtime/load_channel_mgr_test.cpp b/be/test/runtime/load_channel_mgr_test.cpp
index 386f44a7931c5c..1c7af66ec68479 100644
--- a/be/test/runtime/load_channel_mgr_test.cpp
+++ b/be/test/runtime/load_channel_mgr_test.cpp
@@ -45,7 +45,7 @@ OLAPStatus close_status;
 int64_t wait_lock_time_ns;
 
 // mock
-DeltaWriter::DeltaWriter(WriteRequest* req, std::shared_ptr<MemTracker> mem_tracker,
+DeltaWriter::DeltaWriter(WriteRequest* req, const std::shared_ptr<MemTracker>& mem_tracker,
                          StorageEngine* storage_engine) :
         _req(*req) {
 }
@@ -57,7 +57,7 @@ OLAPStatus DeltaWriter::init() {
     return OLAP_SUCCESS;
 }
 
-OLAPStatus DeltaWriter::open(WriteRequest* req, std::shared_ptr<MemTracker> mem_tracker, DeltaWriter** writer) {
+OLAPStatus DeltaWriter::open(WriteRequest* req, const std::shared_ptr<MemTracker>& mem_tracker, DeltaWriter** writer) {
     if (open_status != OLAP_SUCCESS) {
         return open_status;
     }