Robert Haas <robertmhaas@gmail.com> writes:
> Right now, if the SR master reboots unexpectedly (say, power plug pull
> and restart), the slave never notices. It just sits there forever
> waiting for the next byte of data from the master to arrive (which it
> never will).
This is nonsense --- the slave's kernel *will* eventually notice that
the TCP connection is dead, and tell walreceiver so. I don't doubt
that the standard TCP timeout is longer than people want to wait for
that, but claiming that it will never happen is simply wrong.
I think that enabling slave-side TCP keepalives and control of the
keepalive timeout parameters is probably sufficient for 9.0 here.
regards, tom lane
