[aeyes]

> You can't scale an application that relies on a database heavily to this level because your fundamental constraint IS the database.

I pool ~10.000 connections down to under 500. I can't do application level pooling because the application is just thousands of individual processes, you often see this with Python, PHP or NodeJS applications.

500 open connections is way less overhead than 10.000 on the Postgres server. I'm very happy to "pass the buck" of connection pooling to separate machines with pgBouncer.