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fix(artwork): index artwork_queue in dequeue order

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The previous leading retry_at range column forced a temp B-tree sort of the whole eligible set on every DequeueBatch; ordering the index by (priority DESC, enqueued_at) lets scans stop after the batch size.
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Deluan 2026-07-22 00:36:22 -04:00
commit 034cd17498
1 changed files with 2 additions and 1 deletions
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db/migrations/20260722023032_add_artwork_tables.sql
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@ -33,7 +33,8 @@ CREATE TABLE artwork_queue (
enqueued_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
PRIMARY KEY (item_kind, item_id, image_type)
) WITHOUT ROWID;
CREATE INDEX ix_artwork_queue_drain ON artwork_queue(retry_at, priority, enqueued_at);
-- Ordered to match DequeueBatch (priority DESC, enqueued_at) so drains stop after n rows; retry_at makes it covering.
CREATE INDEX ix_artwork_queue_drain ON artwork_queue(priority DESC, enqueued_at, retry_at);
-- +goose Down
DROP TABLE artwork_queue;