I think there is at least[4] one confusing documentation leftover from the 9.0 days at: http://www.postgresql.org/docs/devel/static/warm-standby.html
First, we claim: | Streaming replication is asynchronous, so there is still a small delay | between committing a transaction in the primary and for the changes | to become visible in the standby. This unqualified statement, which has remained the same since 9.0, suggests synchronous replication is not possible using streaming replication. Further down we are closer to the truth: | PostgreSQL streaming replication is asynchronous by default. Proposed fix for this gripe attached. I'd be pleased to see this particular doc patch backpatched to 9.2 and 9.1, given that the replication docs are both important and fairly confusing. The Streaming Replication wiki page[1] contains similar out-of-date claims[2]; I can fix some of the egregious errors myself, though help is welcome. The "Synchronous Replication" wiki page[3] is in even worse shape, containing mostly info about a patch different than what was committed... and it's currently the first Google search result for "postgresql synchronous replication" :-( Josh [1] http://wiki.postgresql.org/wiki/Streaming_Replication [2] such as "Currently SR supports only asynchronous log-shipping", or already-released functionality described under the "Future release section". [3] http://wiki.postgresql.org/wiki/Synchronous_replication [4] I have a larger gripe about the way this entire page is laid out, with streaming rep. info bolted onto a page which is still named and was intended to be about warm standby, but I'll try to make a separate thread about that.
streaming_rep.docfix.diff
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