;
alter database add standby logfile group 9 ('+DATA/orcl/onlinelog/standby_group_9.log') size 60M reuse;
alter database add standby logfile group 10 ('+DATA/orcl/onlinelog/standby_group_10.log') size 60M reuse;
然后在备库执行
alter database recover managed standby database using current logfile disconnect;
alter system set standby_file_management='auto';