Two minor gripes about these new functions:
(1) I think pg_total_relation_size() is a bit more concise and clear
than pg_complete_relation_size().
(2) pg_cancel_backend(), pg_reload_conf(), and pg_rotate_logfile() all
return an int indicating success (1) or failure (0). Why shouldn't these
functions return a boolean?
(Presumably there is a good reason why these functions return a status
code at all, rather than aborting via elog on error -- right?)
-Neil