> including a separate database server for every client .. .. is actually a kind of "[h]andling this on the application level", with "this" being the Postgres

> including a separate database server for every client .. .. is actually a kind of "[h]andling this on the application level", with "this" being the Postgres' process management. Each database gets its own daemon and it is this per-database process that is responsible for launching a peer process for each connection. There are likely legitimate use cases for multiple PG databases per node, but multi-tenancy is not one of them.