I think it's an issue with a microservice setup. TFA suggests ~300 connections being optimal for Postgres and I've seen microservice setups which have more tha

I think it's an issue with a microservice setup. TFA suggests ~300 connections being optimal for Postgres and I've seen microservice setups which have more than 300 processes, which means even limiting each process to a single DB connection might not be enough. But yeah, for less distributed applications, just have N worker threads and don't close the DB connection after each job.