Daan MeijerandClaude Fable 5.1
411c36eec0
A poster of 2.7 kB broke the index build (a btree key is at most a third of a page) and left an invalid index that IF NOT EXISTS would have taken for the real one: the migration drops it first and indexes md5(poster), and the sweep asks by it. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
24 lines
1.0 KiB
TypeScript
24 lines
1.0 KiB
TypeScript
import { BaseSchema } from '@adonisjs/lucid/schema'
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/**
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* The discard sweep of a dropped signature (tool, group, poster) read the whole pending_releases table per
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* signature: the planner took a parallel seq scan over the poster test, four minutes on the HDD that starved the
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* lanes' claims (LOG.md (134)). The waiting rows by signature make it an index range. By the poster's md5: a
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* poster of 2.7 kB broke the first build (a btree key is at most a third of a page), which left an invalid index
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* behind that IF NOT EXISTS would have taken for the real one; the drop clears it.
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*/
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export default class extends BaseSchema {
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static disableTransactions = true
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async up() {
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this.schema.raw(`DROP INDEX CONCURRENTLY IF EXISTS pending_releases_signature_idx`)
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this.schema.raw(
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`CREATE INDEX CONCURRENTLY IF NOT EXISTS pending_releases_signature_idx ON pending_releases (group_id, tool, md5(poster)) WHERE status = 0`
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)
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}
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async down() {
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this.schema.raw(`DROP INDEX CONCURRENTLY IF EXISTS pending_releases_signature_idx`)
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}
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}
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