On Wednesday, March 22, 2017 4:28:18 PM EDT Robert Haas wrote:
> On Wed, Mar 22, 2017 at 4:00 PM, Peter Eisentraut
> > I think we could use "in_recovery", which would be consistent with
> > existing naming.
>
> True.
Ironically, that was the name I originally used. I'll update the patch.
> (Jaime's question is also on point, I think.)
The main (and only) point of this patch is to avoid polling. Since
"in_recovery" is marked as GUC_REPORT, it will be sent to the client
asynchronously in a ParamStatus message. Other GUC_REPORT variables set
a good precedent.
My argument is that Hot Standby is a major mode of operation, which
significantly alters how connected clients work with the server, and
this bit of knowledge is no less important than the other GUC_REPORT
vars.
Elvis
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