Partially address sorting memory issues#86
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DataFusion 52.1.0 has a TOCTOU race in ExternalSorter where merge reservations are freed and re-created empty, letting other partitions steal the memory (apache/datafusion#20642). Until the upstream fix lands, compute a data-aware sort_spill_reservation_bytes by sampling actual Arrow row sizes from the input, estimating spill file count, and reserving enough for the merge phase.
coracuity
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karimsa-acuity
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Mar 4, 2026
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WTF
Try to calculate spill settings better to allow more room for the unspillable portions of larger-than-memory dataset sorts. This will still be pretty limited until something like apache/datafusion#20642 lands.
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