diff --git a/be/src/olap/memtable.cpp b/be/src/olap/memtable.cpp
index 233c59f0910871..5db3d89378bcc2 100644
--- a/be/src/olap/memtable.cpp
+++ b/be/src/olap/memtable.cpp
@@ -43,7 +43,6 @@
 namespace doris {
 
 bvar::Adder<int64_t> g_memtable_cnt("memtable_cnt");
-bvar::Adder<int64_t> g_memtable_input_block_allocated_size("memtable_input_block_allocated_size");
 
 using namespace ErrorCode;
 
@@ -151,7 +150,6 @@ MemTable::~MemTable() {
                        << _mem_tracker->consumption();
         }
     }
-    g_memtable_input_block_allocated_size << -_input_mutable_block.allocated_bytes();
     g_memtable_cnt << -1;
     if (_keys_type != KeysType::DUP_KEYS) {
         for (auto it = _row_in_blocks.begin(); it != _row_in_blocks.end(); it++) {
@@ -222,11 +220,8 @@ Status MemTable::insert(const vectorized::Block* input_block,
 
     auto num_rows = row_idxs.size();
     size_t cursor_in_mutableblock = _input_mutable_block.rows();
-    auto block_size0 = _input_mutable_block.allocated_bytes();
     RETURN_IF_ERROR(_input_mutable_block.add_rows(input_block, row_idxs.data(),
                                                   row_idxs.data() + num_rows, &_column_offset));
-    auto block_size1 = _input_mutable_block.allocated_bytes();
-    g_memtable_input_block_allocated_size << block_size1 - block_size0;
     for (int i = 0; i < num_rows; i++) {
         _row_in_blocks.emplace_back(new RowInBlock {cursor_in_mutableblock + i});
     }
@@ -631,7 +626,6 @@ Status MemTable::_to_block(std::unique_ptr<vectorized::Block>* res) {
         }
         RETURN_IF_ERROR(_sort_by_cluster_keys());
     }
-    g_memtable_input_block_allocated_size << -_input_mutable_block.allocated_bytes();
     _input_mutable_block.clear();
     // After to block, all data in arena is saved in the block
     _arena.reset();