NGA-TRAN commented on issue #396:
URL:
https://github.com/apache/arrow-datafusion/issues/396#issuecomment-875625584
Regarding metrics, I think the following items will be useful:
1. Sort algorithm (quick sort, ...)
2. If possible, how many partitions (input streams) get sorted.
3. Depends on sort algorithm, we may be able to know what kind of input
encoding (e.g. RLE) and number of distinct values. I think these metrics will
also help us to evaluate the effectiveness of the sort algorithm we choose.
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