[nijave]

& with RDS postgres, in a lot of cases, you're probably o.k. with gp2 vs the much more expensive io1 provisioned IOPs storage unless you have a fairly business database (100s-1000s qps)

The main difference is 95% performance SLA on gp2 vs >99 on io1

(You get 3x IOP per GB on gp2)

[base]

io1 also has a slight better performance than gp2