On Fri, Nov 20, 2015 at 1:33 AM, Peter Eisentraut <peter_e@gmx.net> wrote:
> There is no documentation what use case the new (in 9.5) parameter
> wal_retrieve_retry_interval is for. The commit message
> (5d2b45e3f78a85639f30431181c06d4c3221c5a1) alludes to something, but
> even that is not clear, and obviously in the wrong place. Could we come
> up with something more to put into the documentation?
Yeah, we should highlight the facts that recovery can be made more
responsive when attempting to detect WAL. In archive recovery, this
can be translated by the fact that new WAL segments can be detected
more quickly and make recovery more responsive. The opposite is
actually what leaded to the patch: requirement was to limit the number
of times archive host was requested with a server that had low
activity, the archive host being on AWS.
An idea would be something like the patch attached. Thoughts?
--
Michael