Re: PITR Signalling the Archiver

Simon Riggs <simon@2ndquadrant.com> writes:
> I need to send a signal from a backend to the archiver process.

> 1. What signal should I use? 

SIGUSR1 or SIGUSR2 would be the safest choices.

> 2. How do I give the processid of the archiver to the backend? The
> archiver may restart at any time, so its pid could change after a
> backend is forked.

My answer would be "don't".  Send a signal to the postmaster and
let it signal the current archiver child.  Use the existing
SendPostmasterSignal() code for the first part of this.
        regards, tom lane