pg_stat_replication shows all replication information to all users, no
requirement to be a superuser or anything. That leaks a bunch of
information that regular pg_stat_activity doesn't - such as clients IP
addresses. And also of course all the replication info itself, which
may or may not be a problem.
I suggest pg_stat_replication do just like pg_stat_activity, which is
return NULL in most fields if the user isn't
(superuser||same_user_as_that_session).
--
Magnus Hagander
Me: http://www.hagander.net/
Work: http://www.redpill-linpro.com/
