Ben Thorner 87cd40d00a Scale timeout task to work on arbitrary volumes ...

Previously this was limited to 500K notifications. While we don't
expect to reach this limit, it's not impossible e.g. if we had a
repeat of the incident where one of our providers stopped sending
us status updates. Although that's not great, it's worse if our
code can't cope with the unexpectedly high volume.

This reuses the technique we have elsewhere [1] to keep processing
in batches until there's nothing left. Specifying a cutoff point
means the total amount of work to do can't keep growing.

[1]: 2fb432adaf/app/dao/notifications_dao.py (L441)

2021-12-13 17:14:28 +00:00

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