Gabriel39 commented on code in PR #18126:
URL: https://github.com/apache/doris/pull/18126#discussion_r1149959666


##########
be/src/vec/exec/scan/pip_scanner_context.h:
##########
@@ -89,10 +95,15 @@ class PipScannerContext : public vectorized::ScannerContext 
{
         }
     }
 
+    bool has_enough_space_in_blocks_queue() const override {
+        return _current_used_bytes < _max_bytes_in_queue / 2;
+    }
+
 private:
     int _next_queue_to_feed = 0;
     std::vector<std::unique_ptr<std::mutex>> _queue_mutexs;
     std::vector<std::list<vectorized::BlockUPtr>> _blocks_queues;
+    std::atomic_int64_t _current_used_bytes = 0;

Review Comment:
   I suspect if it's necessary to make `_current_used_bytes` atomic since this 
variable is accessed almost guarded by a mutex



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