Re: allow online change primary_conninfo

Hi,

On 2018-12-14 16:55:42 +0900, Michael Paquier wrote:
> On Thu, Dec 13, 2018 at 01:51:48PM +0300, Sergei Kornilov wrote:
> > Depends on this discussion: https://www.postgresql.org/message-id/20181212053042.GK17695@paquier.xyz
> > If walreceiver will use GUC conninfo for startup - then yes, we can
> > remove such static variables.  If walreceiver will still use conninfo
> > from WalRcv - we have race condition between RequestXLogStreaming from
> > startup, config reload, and walreceiver start. In this case I need
> > save conninfo from WalRcv and compare new GUC value with them.
> 
> I would recommend waiting for the conclusion of other thread before
> moving on with this one.  There are arguments for letting the startup
> process deciding which connection string the WAL receiver should use as
> well as letting the WAL receiver use directly the connection string from
> the GUC.

I suggest continuing the development of the patch without relying on
that refactoring.

Greetings,

Andres Freund