这是因为刚执行的alter system set db_unique_name='hyoms01' scope=spfile;还没有数据库识别到
需要重新启动数据库可以解决。
SQL> select * from V$DATAGUARD_CONFIG ;
DB_UNIQUE_NAME
------------------------------
hyoms
hyoms01
hyoms02
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup
SQL> select * from V$DATAGUARD_CONFIG ;
DB_UNIQUE_NAME
------------------------------
hyoms01
hyoms02
SQL> alter system set log_archive_dest_1='location=/u01/app/oracle/flash_recovery_area/HYOMS/archivelog valid_for=(all_logfiles,all_roles) db_unique_name=hyoms01';
System altered.