Yandex.Mail's successful migration from Oracle to Postgres [pdf]
So having read through the slides, these are not bad slides, but I'm missing the 'real' wow-factor of why Postgres was a better choice in the end than Oracle. There's no doubt that the rewrite (which, because of PL/SQL -> PL/pgSQL, there was a rewrite) benefited them, but all I can glean from the slides is Postgres hasn't failed them yet and the rewrite worked.So as much as I want to talk about Oracle vs. Postgres, these slides aren't giving me anything technical to debate.