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As long as I want to avoid very edgy race condition cases (low throughput), any DB will work right?

Either Mongo, MySQL or List in Redis.

Is there anything sepcific about Postgres when it comes to this? (except SKIP TABLES, as mentioned in other comments)

I said postgres because it's just all around good at a bunch of stuff. But I've used redis lists in the past to great success. Redis streams might be even better but they weren't ready the last time I needed a queue.

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