Re: BUG #15663: set update_process_title =on/off did not take effect

PG Bug reporting form <noreply@postgresql.org> writes:
> postgres=# set update_process_title =on;
> SET

That only changes the setting within the current process.  If you want
to change the value that applies in other processes such as a
background walsender, you need to do something else (ALTER SYSTEM
or modify postgresql.conf, and then reload settings).

            regards, tom lane