Add per-aggregate accumulator phase metrics - #24423

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kosiew wants to merge 6 commits into

apache:mainfrom

kosiew:aggmetrics-02-23570

Commits on Aug 17, 2026

feat(metrics): add per-aggregation timers and hash+ordered migrated tables
kosiew
committed
4069f78
feat(accumulator): implement safe simplification
kosiew
committed
348a6e4
fix(accumulator_phases): model spill/replay phases for final and single modes, cover partitioned variants, and add regression test for forced‑spill ordered‑single
kosiew
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f451457
feat: add positive-duration assertions to group-values metrics
kosiew
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6d54ac7
refactor: implement safe refactors
kosiew
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a388f16
feat(aggregates): add positivity assertions for ordered partial and final aggregates
kosiew
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84120c2