[gpadmin@bogon ~]$ gpstart -a -m
[gpadmin@bogon ~]$ PGOPTIONS='-c gp_session_role=utility' psql -d postgres
psql (9.4.24)
Type "help" for help.

postgres=# select * FROM gp_toolkit.gp_param_setting('max_connections');
server closed the connection unexpectedly
	This probably means the server terminated abnormally
	before or while processing the request.
The connection to the server was lost. Attempting reset: Failed.