Vick Khera <vivek(at)khera(dot)org> writes:
> What exactly does the configure flag to enable systemd support do?
Not a lot. A quick grep for USE_SYSTEMD says it does nothing except
add code in the postmaster to report ready/not-ready state transitions
by calling sd_notify(). We have significantly more lines of
documentation concerning systemd than we do code.
regards, tom lane