src/test/isolation2/expected/enable_autovacuum.out

alter system set autovacuum = on;
ALTER
select gp_segment_id, pg_reload_conf() from gp_id union select gp_segment_id, pg_reload_conf() from gp_dist_random('gp_id');
 gp_segment_id | pg_reload_conf 
---------------+----------------
 2             | t              
 1             | t              
 0             | t              
 -1            | t              
(4 rows)