bkietz commented on pull request #8533:
URL: https://github.com/apache/arrow/pull/8533#issuecomment-717516187


   Not in scope for this PR, may result in further spurious OOMs later:
   - Feather APIs don't accept a MemoryPool
   - `LocalFileSystem::OpenInput{Stream,File}` use the default memory pool if 
`use_mmap` is not set. This affects dataset scanning transitively since we use 
those methods to open files for reading
   - Any file opened with `FileSystem$OpenInputStream` is also affected


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