viirya opened a new issue #1920:
URL: https://github.com/apache/arrow-datafusion/issues/1920


   **Is your feature request related to a problem or challenge? Please describe 
what you are trying to do.**
   
   In `MemoryManager`, `can_grow_directly` tries to grow memory attempt and 
blocks the thread when it cannot acquire for a least amount of memory 
(`Condvar.wait`). It looks a bit strange to wait forever for other consumers to 
spill there. Because it doesn't actually trigger other consumers to do spilling 
but just passively waits for notification once other consumers do spilling, in 
worse case it might wait for very long time. In such case, it seems more ideal 
to wait for a duration, and spill by itself if timeout happens.
   
   **Describe the solution you'd like**
   A clear and concise description of what you want to happen.
   
   **Describe alternatives you've considered**
   A clear and concise description of any alternative solutions or features 
you've considered.
   
   **Additional context**
   Add any other context or screenshots about the feature request here.
   


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