Putting this here since I’m using RDS (postgres) and there’s no database channel. I upgraded my production database from postgres 9.5.22 to 12.4 over the weekend as well as upgrading the instance type from r4.2xl to r5.2xl. In this upgrade, my read iops went from 12,000 -> 2,000 and I cannot figure out why. I understand that both the instance type upgrade and the postgres version upgrade introduce performance gains just by merely performing the upgrade, but I wasn’t expecting this big of an improvement. No changes application-wise and I haven’t seen any issues w/ our applications in regards to query data. Obviously I’d be happy with this much of an improvement if it’s expected, but I’m a bit weary as well.