You should always upgrade if you want to take full advantage of PostgreSQL. New major versions provide performance benefits as well as new features.
But a lot of PostgreSQL users are wary of major version updates because they present a challenge; namely, they require some downtime. How much downtime depends on how you upgrade.
Aiven has that downtime down to seconds.
Aiven makes major PG upgrades easy
Aiven's in-place upgrades for PostgreSQL take out multiple steps from the upgrade process and reduces downtime exponentially. Upgrading smaller instances will take seconds; larger instances often no more than one minute.
Here's what happens during an in-place upgrade:
An automatic process checks that the upgrade is possible.
Possible standby nodes are shut down.
The primary node is upgraded.
A full backup is created.
New standby nodes are created.
A possible read-only replica service is upgraded by the same process.
But that's all done by Aiven - all you have to do is to click a button in the Aiven Console to get it started.