> The main attraction of Redis is in-memory writes with async persistence. FWIW, you can have that in postgres as well, cf. synchronous_commit = off > Trading

> The main attraction of Redis is in-memory writes with async persistence. FWIW, you can have that in postgres as well, cf. synchronous_commit = off > Trading durability and availability for the increased performance. If you give up this then there is precisely 0 reasons to choose Redis over PostgreSQL. As a PostgreSQL developer, I'd say that performance / latency / jitter can still be reasons to choose redis over postgres. The per-read overhead in redis is often a good bit lower than in postgres, and there's less variability in response times.