zlacker

>>anonu+(OP)
This seems to come up on HN at least once a year. Sure it can work but LISTEN ties up a connection which limits scalability as connections are limited and expensive. Also, mitigation strategies like PgBouncer cannot be used with this approach (nor can scale out solutions like CitusDB I don't think).

Of course, if scalability is not a concern (or the connection limitations are eventually fixed in postgres - this has improved in 14), this would be a very viable approach.

>>osigur+Fh
>LISTEN ties up a connection

Wait, what?? I can't keep doing things with my connection after I issue a LISTEN? That doesn't seem right! I would assume it would isomorphic to how unix-y bg programs will occasionally write to the console (although I see how this might be hard to deal with at the driver level). Now I will have to go check.