Re: Proposal: remove string "contains errors; unaffected changes were applied"

On Sun, May 31, 2020 at 01:43:45PM +0600, Антон Пацев wrote:
> Hello!
> When parameter cannot be changed without restarting the server postgresql
> write:
> "LOG: configuration file "/var/lib/postgresql/data/postgresql.auto.conf"
> contains errors; unaffected changes were applied"
> May be not write this string to LOG?
>
> This string confuses people. If all log send to ELK, then
> administrator think that postgresql have error. But postgresql do not have
> error.

I think you're suggesting that the message should be sent to the client, but
not to the log.

But I think it *should* go to the log; otherwise, a bad change might cause the
server to later refuse to start.  Any admins or monitoring system watching the
log should have the ability to see that a change isn't effective.  That's also
why (in my mind) we have pg_settings.pending_restart.

--
Justin