On 2020-Nov-18, Stephen Haddock wrote: > Hello, > > When upgrading an older version of postgres, version 8.4 for example, to a > newer version such as 9.6, does the data have to be migrated immediately? As others have said: yes. > It looks like the recommended method is to dump the data, upgrade, > initialize a new cluster, and then restore the dumped data into the newer > version. Actually, you can also use pg_upgrade, which might be more convenient, particularly if your database is large.
