oracle--DG模式备库归档缺失问题（1）

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01.问题描述

备库的归档日志没有增加，一直等待一个

查询问题：

SQL> SELECT * FROM V$ARCHIVE_GAP; THREAD# LOW_SEQUENCE# HIGH_SEQUENCE#
---------- ------------- --------------
1 6434 6435

select name ,sequence# from v$archived_log;
NAME SEQUENCE#
-------------------------------------------------------------------------------- ----------
/u01/app/oracle/product/11.2.0/db_1/dbs/archivelog/1_6414_1000748999.dbf 6414
/u01/app/oracle/product/11.2.0/db_1/dbs/archivelog/1_6417_1000748999.dbf 6417
/u01/app/oracle/product/11.2.0/db_1/dbs/archivelog/1_6420_1000748999.dbf 6420
/u01/app/oracle/product/11.2.0/db_1/dbs/archivelog/1_6421_1000748999.dbf 6421
/u01/app/oracle/product/11.2.0/db_1/dbs/archivelog/1_6419_1000748999.dbf 6419
/u01/app/oracle/product/11.2.0/db_1/dbs/archivelog/1_6418_1000748999.dbf 6418
/u01/app/oracle/product/11.2.0/db_1/dbs/archivelog/1_6425_1000748999.dbf 6425
/u01/app/oracle/product/11.2.0/db_1/dbs/archivelog/1_6426_1000748999.dbf 6426
/u01/app/oracle/product/11.2.0/db_1/dbs/archivelog/1_6423_1000748999.dbf 6423
/u01/app/oracle/product/11.2.0/db_1/dbs/archivelog/1_6422_1000748999.dbf 6422
/u01/app/oracle/product/11.2.0/db_1/dbs/archivelog/1_6424_1000748999.dbf 6424NAME SEQUENCE#
-------------------------------------------------------------------------------- ----------
/u01/app/oracle/product/11.2.0/db_1/dbs/archivelog/1_6366_1000748999.dbf 6366
/u01/app/oracle/product/11.2.0/db_1/dbs/archivelog/1_6427_1000748999.dbf 6427
/u01/app/oracle/product/11.2.0/db_1/dbs/archivelog/1_6428_1000748999.dbf 6428
/u01/app/oracle/product/11.2.0/db_1/dbs/archivelog/1_6429_1000748999.dbf 6429
/u01/app/oracle/product/11.2.0/db_1/dbs/archivelog/1_6509_1000748999.dbf 6509
/u01/app/oracle/product/11.2.0/db_1/dbs/archivelog/1_6431_1000748999.dbf 6431
/u01/app/oracle/product/11.2.0/db_1/dbs/archivelog/1_6432_1000748999.dbf 6432
/u01/app/oracle/product/11.2.0/db_1/dbs/archivelog/1_6430_1000748999.dbf 6430
/u01/app/oracle/product/11.2.0/db_1/dbs/archivelog/1_6433_1000748999.dbf 6433
/u01/app/oracle/product/11.2.0/db_1/dbs/archivelog/1_6436_1000748999.dbf 6436