database: Add index to optimize background job queue processing #11954
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Turbo87
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This commit creates a composite index on `(priority DESC, id ASC)` to improve performance of job selection queries that order by priority and id for queue processing. This improved the job selection query performance from roughly 800ms to 0.07ms after enqueuing all of the `analyze-crate-file` backfill background jobs.
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This commit creates a composite index on
(priority DESC, id ASC)to improve performance of job selection queries that order by priority and id for queue processing.This improved the job selection query performance from roughly 800ms to 0.07ms after enqueuing all of the
analyze-crate-filebackfill background jobs.Without the index, the background worker got increasingly faster the less jobs were in the database:
With this index we should have seen a mostly linear graph.