https://docs.oracle.com/cd/F19136_01/dgbkr/examples-using-data-guard-broker-DGMGRL-utility.html#GUID-8939FDE1-19B9-477E-99F8-5353BDD3AEC2
dgmgrl
connect sys/oracle
show configuration;
show database verbose stb;
EDIT DATABASE stb SET STATE = 'APPLY-OFF';
show database verbose stb;
EDIT DATABASE stb SET STATE = 'APPLY-ON';
show database verbose stb;