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synapse/changelog.d/17032.misc

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Use receipts `event_stream_ordering` instead of joins (#17032) Resurrecting https://github.com/matrix-org/synapse/pull/13918. This should reduce IOPs incurred by joining to the events table to lookup stream ordering, which happens in many receipt handling code paths. Like the previous PR I believe sufficient time has passed between the original migration in DB schema 72 and now to merge this as-is. It's highly unlikely that both the migration is still ongoing AND (active) users still have any receipts prior to that date. In the unlikely event there is a receipt without a populated `event_stream_ordering` synapse will behave just as it does now when receipts exist for events that don't (yet): for push action calculation the receipts are just ignored. I've removed the validation on event IDs as this is already covered here: https://github.com/element-hq/synapse/blob/59ceabcb9798793cd4312fdbcced4e612aeda84d/synapse/handlers/receipts.py#L189-L192
2024-04-12 02:28:44 -06:00
Use new receipts column to optimise receipt and push action SQL queries. Contributed by Nick @ Beeper (@fizzadar).