alter database add standby logfile group 4 ('/u01/oradata/test/stdredo4.log') size 100M;
alter database add standby logfile group 5 ('/u01/oradata/test/stdredo5.log') size 100M;
alter database add standby logfile group 4 ('/u01/oradata/test/stdredo4.log') size 100M;
alter database add standby logfile group 5 ('/u01/oradata/test/stdredo5.log') size 100M;
三、切换操作
1、主库切换到备库
alter database commit to switchover to physical standby with session shutdown;
2、备库切换到主库
alter database recover managed standby database finish;
alter database commit to switchover to primary;