Instagram isn't very complicated to be honest so I doubt that's a good scalability example.
Skype's plan to support 1 billion users w/ postgres a few years ago? http://highscalability.com/skype-plans-postgresql-scale-1-bi... and http://www.slideshare.net/adorepump/small-overview-of-skype-...
Billions of records, 10,000 transactions per second. This was a couple of years ago.
Dunno if Skype is complicated enough for you.
Re:Why Use Postgres
by erichocean on Monday April 30, 2012 @07:22PM
(#3912093)
I get the sense he'll ratchet up what "complicated" means until he wins the argument. :)
http://www.databasesoup.com/2012/04/sharding-postgres-with-i...