pg_upgrade in primary/standby architecture

Hello PGAdmins,

I am wondering if there is a way we can leverage replication set up to minimize outage caused by pg_upgrade in case of major version upgrade. We use streaming replication.

Scenario:

1.      Primary and standby are running 9.1.6 and I want to upgrade both to 9.2.4 (or 9.2.6)

2.      Streaming replication is used

3.      I cannot use pg_dump due to the size of the database. I have to use pg_upgrade

Thanks,

Murthy