On 19 November 2016 at 01:29, Robert Haas <robertmh...@gmail.com> wrote:
>> We can and probably should have both.
>> If the server tells us on connect whether it's a standby or not, use that.
>> Otherwise, ask it.
>> That way we don't pay the round-trip cost and get the log spam when
>> talking to newer servers that send us something useful in the startup
>> packet, but we can still query it on older servers. Graceful fallback.
>> Every round trip is potentially very expensive. Having libpq do them
>> unnecessarily is bad.
> True, but raising the bar for this feature so that it doesn't get done
> is also bad. It can be improved in a later patch.
Good point. Starting with the followup query method seems fine.
Craig Ringer http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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