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[NSE-120] Columnar window: Reduce peak memory usage and fix performance issues #121
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zhztheplayer
changed the title
zhztheplayer
changed the title
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At SF1000: Vanilla Spark: Before (ColumnarWindow disabled): After: |
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zhouyuan
reviewed
Feb 23, 2021
| case s: CoalesceBatchesExec => | ||
| s.child | ||
| case _ => sortRemoved | ||
| } |
zhouyuan
approved these changes
Feb 24, 2021
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In TPC-DS this is typically for query 67 to improve the huge RANK window.