Switchover: convert primary database to standby

–On Primary

— Convert primary database to standby

CONNECT / AS SYSDBA
ALTER DATABASE COMMIT TO SWITCHOVER TO STANDBY;

— Shutdown primary database

SHUTDOWN IMMEDIATE;

— Mount old primary database as standby database, open and enable real-time apply

STARTUP NOMOUNT;
ALTER DATABASE MOUNT STANDBY DATABASE;
ALTER DATABASE OPEN;

ALTER DATABASE RECOVER MANAGED STANDBY DATABASE using current logfile DISCONNECT FROM SESSION;

–On Standby

— Convert standby database to primary

CONNECT / AS SYSDBA
ALTER DATABASE COMMIT TO SWITCHOVER TO PRIMARY;

— Shutdown standby database

SHUTDOWN IMMEDIATE;

— Open old standby database as primary

STARTUP;