Aaron Kimbrell
8ac9d991f6
perf(migrations): index map_events_daily by day
...
Its key starts with the zone, so the economy compaction read the whole table twice for every
day it merged into a month. With 900k old rows to merge on MariaDB the task went from 107 s to
14 s. The index holds only the day and the key, so the game's upsert that adds to a row's
events never updates it.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com >
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