DG GAP解决方案

备库中大量出现类似如下内容：

Tue Apr 26 17:34:49 2016

SMON: enabling cache recovery

Dictionary check beginning

Dictionary check complete

Database Characterset is AL32UTF8

No Resource Manager plan active

replication_dependency_tracking turned off (no async multimaster replication found)

Physical standby database opened for read only access.

Completed: alter database open read only

CORRUPTION DETECTED: In redo blocks starting at block 1count 2048 for thread 1 sequence 373

ALTER DATABASE RsECOVER  managed standby database using current logfile disconnect

Attempt to start background Managed Standby Recovery process (orcl)

在主库查询归档应用情况：

set lines 300 pages 300

col name for a20

select name,dest_id,thread#,sequence#,standby_dest,applied,registrar,completion_time

from v$archived_log

where standby_dest=‘YES‘

order by thread#,sequence#;

set linesize 140

set pagesize 999

col SEQUENCE# for 999999

col APPLIED for a10

col ARCHIVED for a8

col FIRST_TIME for a20

col NEXT_TIME for a20

alter session set nls_date_format=‘yyyy-mm-dd hh24:mi:ss‘;

select * from (select SEQUENCE#, FIRST_TIME, NEXT_TIME, APPLIED, ARCHIVED from V$ARCHIVED_LOG order by 1 desc) where rownum<100 order by 1;

select SEQUENCE#, FIRST_TIME, NEXT_TIME, APPLIED, ARCHIVED from V$ARCHIVED_LOG;

SEQUENCE# FIRST_TIME       NEXT_TIME   APPLIED   ARC

---------- ------------------ ------------------ --------- ---

387 26-APR-16       26-APR-16   NO    YES

386 26-APR-16       26-APR-16   NO    YES

385 26-APR-16       26-APR-16   NO    YES

382 26-APR-16       26-APR-16   NO    YES

381 26-APR-16       26-APR-16   NO    YES

380 26-APR-16       26-APR-16   NO    YES

379 26-APR-16       26-APR-16   NO    YES

378 26-APR-16       26-APR-16   NO    YES

377 26-APR-16       26-APR-16   NO    YES

376 26-APR-16       26-APR-16   NO    YES

375 26-APR-16       26-APR-16   NO    YES

374 26-APR-16       26-APR-16   NO    YES

372 26-APR-16       26-APR-16   YES    YES

371 26-APR-16       26-APR-16   YES    YES

370 26-APR-16       26-APR-16   YES    YES

369 26-APR-16       26-APR-16   YES    YES

368 26-APR-16       26-APR-16   YES    YES

367 26-APR-16       26-APR-16   YES    YES

366 26-APR-16       26-APR-16   YES    YES

365 26-APR-16       26-APR-16   YES    YES

364 26-APR-16       26-APR-16   YES    YES

363 26-APR-16       26-APR-16   YES    YES

362 26-APR-16       26-APR-16   YES    YES

361 26-APR-16       26-APR-16   YES    YES

360 26-APR-16       26-APR-16   YES    YES

经检查，发现373号归档没应用。 并且查看/data/arch 目录也未发现。

解决办法：

从主库传送373号归档到备库，然后手工注册：

alter database register physical logfile ‘/data/arch/1_1604_905778979.dbf‘;