xudong963 commented on code in PR #20642:
URL: https://github.com/apache/datafusion/pull/20642#discussion_r2930529817
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datafusion/physical-plan/src/sorts/multi_level_merge.rs:
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@@ -356,45 +363,57 @@ impl MultiLevelMergeBuilder {
) -> Result<(Vec<SortedSpillFile>, usize)> {
assert_ne!(buffer_len, 0, "Buffer length must be greater than 0");
let mut number_of_spills_to_read_for_current_phase = 0;
+ // Track total memory needed for spill file buffers. When the
Review Comment:
add a `try_grow_reservation_to_at_least` help to reduce complexity
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