gavinchou commented on code in PR #41818:
URL: https://github.com/apache/doris/pull/41818#discussion_r1814335520


##########
be/src/io/cache/block_file_cache.h:
##########
@@ -446,6 +489,9 @@ class BlockFileCache {
     LRUQueue _disposable_queue;
     LRUQueue _ttl_queue;
 
+    // keys for async remove
+    std::shared_ptr<boost::lockfree::spsc_queue<FileCacheKey>> _recycle_keys;

Review Comment:
   it seems there is no contention on _recycle_keys.
   it is better to  use regular data structure instead for better understanding 
and maintainance



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