diff --git a/be/src/exec/olap_scan_node.cpp b/be/src/exec/olap_scan_node.cpp
index 61befd7edacba0..1507f0c990451a 100644
--- a/be/src/exec/olap_scan_node.cpp
+++ b/be/src/exec/olap_scan_node.cpp
@@ -56,7 +56,6 @@ OlapScanNode::OlapScanNode(ObjectPool* pool, const TPlanNode& tnode, const Descr
           _transfer_done(false),
           _status(Status::OK()),
           _resource_info(nullptr),
-          _buffered_bytes(0),
           _eval_conjuncts_fn(nullptr),
           _runtime_filter_descs(tnode.runtime_filters) {}
 
diff --git a/be/src/exec/olap_scan_node.h b/be/src/exec/olap_scan_node.h
index 688c4517a3c78e..891ea4d36acb40 100644
--- a/be/src/exec/olap_scan_node.h
+++ b/be/src/exec/olap_scan_node.h
@@ -249,7 +249,6 @@ class OlapScanNode : public ScanNode {
 
     TResourceInfo* _resource_info;
 
-    int64_t _buffered_bytes;
     // Count the memory consumption of Rowset Reader and Tablet Reader in OlapScanner.
     std::shared_ptr<MemTracker> _scanner_mem_tracker;
     EvalConjunctsFn _eval_conjuncts_fn;
diff --git a/be/src/vec/exec/volap_scan_node.cpp b/be/src/vec/exec/volap_scan_node.cpp
index 4dba1e7c287b5e..97ded72e52bf98 100644
--- a/be/src/vec/exec/volap_scan_node.cpp
+++ b/be/src/vec/exec/volap_scan_node.cpp
@@ -77,11 +77,8 @@ void VOlapScanNode::transfer_thread(RuntimeState* state) {
     for (int i = 0; i < pre_block_count; ++i) {
         auto block = new Block(_tuple_desc->slots(), _block_size);
         _free_blocks.emplace_back(block);
-        _buffered_bytes += block->allocated_bytes();
     }
 
-    _block_mem_tracker->consume(_buffered_bytes);
-
     // read from scanner
     while (LIKELY(status.ok())) {
         int assigned_thread_num = _start_scanner_thread_task(state, block_per_scanner);
@@ -320,7 +317,6 @@ Status VOlapScanNode::start_scan_thread(RuntimeState* state) {
         _transfer_done = true;
         return Status::OK();
     }
-    _block_mem_tracker = MemTracker::create_virtual_tracker(-1, "VOlapScanNode:Block");
 
     // ranges constructed from scan keys
     std::vector<std::unique_ptr<OlapScanRange>> cond_ranges;
@@ -420,7 +416,6 @@ Status VOlapScanNode::close(RuntimeState* state) {
     std::for_each(_scan_blocks.begin(), _scan_blocks.end(), std::default_delete<Block>());
     _scan_row_batches_bytes = 0;
     std::for_each(_free_blocks.begin(), _free_blocks.end(), std::default_delete<Block>());
-    _block_mem_tracker->release(_buffered_bytes);
 
     // OlapScanNode terminate by exception
     // so that initiative close the Scanner
@@ -547,7 +542,6 @@ Block* VOlapScanNode::_alloc_block(bool& get_free_block) {
     get_free_block = false;
 
     auto block = new Block(_tuple_desc->slots(), _block_size);
-    _buffered_bytes += block->allocated_bytes();
     return block;
 }
 
diff --git a/be/src/vec/exec/volap_scan_node.h b/be/src/vec/exec/volap_scan_node.h
index 9557d5c1e7045f..831b0963b6ff16 100644
--- a/be/src/vec/exec/volap_scan_node.h
+++ b/be/src/vec/exec/volap_scan_node.h
@@ -64,8 +64,6 @@ class VOlapScanNode final : public OlapScanNode {
     std::list<VOlapScanner*> _volap_scanners;
     std::mutex _volap_scanners_lock;
 
-    std::shared_ptr<MemTracker> _block_mem_tracker;
-
     int _max_materialized_blocks;
 
     size_t _block_size = 0;