LogicFan commented on PR #15610:
URL: https://github.com/apache/datafusion/pull/15610#issuecomment-2869669114

   I've tried to use this branch to sort data larger than memory. For 24GB 
parquet file, it produce error `Error: ArrowError(IoError("No space left on 
device (os error 28)", Os { code: 28, kind: StorageFull, message: "No space 
left on device" }), None)` (i think this suggest it uses up all 100GB default 
DiskManager?)
   
   here is the configuration i use
   ```
       let cfg = SessionConfig::new()
           .with_sort_max_spill_merge_degree(2)
           .with_sort_spill_reservation_bytes(1 << 10)
           .with_sort_in_place_threshold_bytes(1 << 10)
           .set_usize("datafusion.execution.batch_size", 16)
           .set_usize("datafusion.execution.soft_max_rows_per_output_file", 
2048)
           .set_usize("datafusion.execution.minimum_parallel_output_files", 32);
   
       let memory_pool = Arc::new(TrackConsumersPool::new(
           FairSpillPool::new(16 * (1 << 30)),
           NonZeroUsize::new(5).unwrap(),
       ));
   ```


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