Re: walsender performance regression due to logical decoding on standby changes

On Wed, 2023-05-17 at 12:34 -0700, Andres Freund wrote:
> I understood Jeff's proposal to just have an early exit if there are
> no
> walsenders connected at all.

My suggestion was we early exit unless there is at least one *waiting*
walsender of the appropriate type. In other words, increment the
counter on entry to WalSndWait() and decrement on exit. I didn't look
in detail yet, so perhaps it's not easy/cheap to do that safely.

Regards,
    Jeff Davis