peterxcli commented on PR #5916:
URL: 
https://github.com/apache/datafusion-comet/pull/5916#issuecomment-5723042805

   > Thanks @peterxcli . LGTM and merging
   > 
   > A few suggested follow-ups:
   > 
   > 1. **Broader performance and scaling coverage**: benchmark on SSD/NVMe 
with many spill rounds and concurrent tasks, reporting spill/merge time, peak 
memory, open file counts, and per-disk peak space.
   > 2. **Range-index memory accounting**: measure the retained range metadata 
under heavy spilling and account for it in memory reservations where 
appropriate.
   > 3. **Evaluate spill-file rotation**: compare the current task-wide file 
with files per spill session or rotation at a byte threshold. If limiting 
individual file size is the objective, a byte threshold addresses that more 
directly than session boundaries. Any rotation should keep open merge readers 
bounded and preserve each partition’s write order.
   
   @sunchao thanks for the suggestion, filed 
https://github.com/apache/datafusion-comet/issues/6010 and 
https://github.com/apache/datafusion-comet/issues/6009.


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