> You should use the "this page in other versions" mechanism at the top of the page you linked to so you can see more recent documentation: most of what PostgreSQL has with regards to replication is from versions more recent than 8.4 (the version you were reading).

I wonder if there's a way the Postgres guys could fix that with some Google-bot directives or something. Usually, the linked page when searching is for an older version, and you have to go click 9.X yourself if you're interested in the latest and greatest.