主从库日志出现断档。问题的解决思路。

SQL> select * from v$archive_gap;

THREAD# LOW_SEQUENCE# HIGH_SEQUENCE#
---------- ------------- --------------
1 43 43

SQL>
SQL> alter database register logfile 'd:oracleARC00043_0660047105.001';

Database altered.

SQL> alter database register logfile 'd:oracleARC00044_0660047105.001';
alter database register logfile 'd:oracleARC00044_0660047105.001'
*
ERROR at line 1:
ORA-16089: archive log has already been registered

SQL> select * from v$archive_gap;

THREAD# LOW_SEQUENCE# HIGH_SEQUENCE#
---------- ------------- --------------
1 45 46

SQL>
SQL>
SQL> alter database register physical logfile 'd:oracleARC00048_0660047105.001
';
alter database register physical logfile 'd:oracleARC00048_0660047105.001'
*
ERROR at line 1:
ORA-16089: archive log has already been registered

SQL>
SQL> alter database register physical logfile 'd:oracleARC00045_0660047105.001
';

Database altered.

SQL> alter database register physical logfile 'd:oracleARC00046_0660047105.001
';

Database altered.

SQL>
SQL> select * from v$archive_gap;

no rows selected

SQL>
SQL> alter database recover managed standby database disconnect from session;

Database altered.

SQL> alter database recover managed standby database cancel;

Database altered.

SQL> alter database open read only;

Database altered.

SQL> select * from t2;

DEPTNO DNAME LOC
---------- -------------- -------------
10 ACCOUNTING NEW YORK
20 RESEARCH DALLAS
30 SALES CHICAGO
40 OPERATIONS BOSTON
50 faint
60 primary to standby
70 ASYNC is success?
80

8 rows selected.

SQL>