I’ve used PG as a message queue, actually it was used as a transactional front end to Kafka; we’d push messages to a PG table during a transaction, which would

I’ve used PG as a message queue, actually it was used as a transactional front end to Kafka; we’d push messages to a PG table during a transaction, which would then be snarfed up to Kafka by a separate process after the transaction completed. I’ve seen very high transaction rates from this arrangement, more than 20k messages/second.