[levkk]

pg_upgrade is a bit manual at the moment. If the database could just be pointed to a data directory and update it automatically on startup, that would be great.

[olavgg]

I agree, why is this still needed? It can run pg_upgrade in the background.

[vbezhenar]

It needs binaries for both old and new versions for some reason.

[justinclift]

When you say "in the background" what are you meaning?

Unless something has radically changed with this last release, then the PostgreSQL database needs to be offline while pg_upgrade is running.