wForget opened a new pull request, #1731:
URL: https://github.com/apache/datafusion-comet/pull/1731

   ## Which issue does this PR close?
   
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   Closes #.
   
   ## Rationale for this change
   
   The memeory acquired by `CometMemoryPool.grow` may be less than the actual 
request, so `MemoryPool.shrink` may release more memory than acquired memory.
   
   
https://github.com/apache/datafusion-comet/blob/25e39ab8ba2b882057c5a5c44be79d88015890fb/native/core/src/execution/memory_pools/unified_pool.rs#L93-L95
   
   ## What changes are included in this PR?
   
   Add an acquired counter to avoid releasing more unacquired memory
   
   ## How are these changes tested?
   
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   2. Serve as another way to document the expected behavior of the code
   
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