[leowoo91]

instagram use postgresql and still web-scale (unless this was satire)

[terafo]

https://www.youtube.com/watch?v=b2F-DItXtZs

[plasma_beam]

I have not watched that video since 2013 (wow!) and it is still hilarious.

[riku_iki]

they obviously didn't use vanilla postgres, but built some custom sharding on top, which is untrivial task (implementation and maintenance(resharding, failover, replication, etc)).