we have PostgreSQL 9.3.x by an application and we'd like to upgrade the PostgreSQL to 11, I am not sure if these link are correct about the upgrade:
PostgreSQL 9.3.x DIRECT upgrade to PostgreSQL 11 is possible ?
inplace upgrade on the SAME box is ok ?
How about PostgreSQL 9.3.x DIRECT upgrade to PostgreSQL 13/14?
As according to the URLs above, it seems we just install new postgreSQL 11/13/14 on the New box, then run pg_ugprade from new instance and connect to old instance, pg_upgrade will do everything for us ,e.g. copy data, event it is 406GB to the new instance with all login , role and password?