Aurora still can't do zero downtime upgrades though, which surprised me. You get closer with vanilla RDS PostgreSQL. And if you use RDS proxy or pgbouncer it's

Aurora still can't do zero downtime upgrades though, which surprised me. You get closer with vanilla RDS PostgreSQL. And if you use RDS proxy or pgbouncer it's better. At a previous company I had to tend to a large here of MySQL clusters and we did all sorts of zero-downtime stuff there. I've found MySQL replication far easier to work with.