Peter Eisentraut <peter_e@gmx.net> wrote:
> On ons, 2010-08-11 at 09:55 -0400, Tom Lane wrote:
>> BTW, I don't know why anyone would think that "a random number"
>> would offer any advantage here. I'd use the postmaster PID,
>> which is guaranteed to be unique across the space that you're
>> worried about. In fact, you could implement this off the
>> existing postmaster.pid, no need for any new file. What's
>> lacking is the pg_ping protocol.
>
> Why not just compare pg_backend_pid() with postmaster.pid?
See the prior discussion in the archives. We started with that and
found problems, to which Tom suggested a random number as the best
solution. Let's at least start any further discussion informed by
what's gone before; if there was a flaw in the reasoning, please
point that out.
-Kevin