(www.uber.com)

234 points benocodes | 3 comments | 14 Oct 24 12:08 UTC | HN request time: 0.202s | source

1. vivzkestrel ◴[14 Oct 24 17:46 UTC] No.41839908[source]▶

>>41836748 (OP) #

Anyone has any ideas why Uber doesn't use PostgreSQL?

replies(2): >>41839944 #>>41839967 #

2. hu3 ◴[14 Oct 24 17:50 UTC] No.41839944[source]▶

>>41839908 (TP) #

https://eng.uber.com/postgres-to-mysql-migration/

3. cyberax ◴[14 Oct 24 17:52 UTC] No.41839967[source]▶

>>41839908 (TP) #

They switched from PG to MySQL because they need to update highly concurrent tables, and PG created tons of bloat as a result. MySQL uses locking instead of optimistic concurrency.

↑

Upgrading Uber's MySQL Fleet