在配置了brokger的dg环境下，一定要用broker 去调整相关参数，切记。

1、查看DG状态，发现有告警
DGMGRL> show database orcldg;

Database - orcldg

  Role:               PHYSICAL STANDBY
  Intended State:     APPLY-ON
  Transport Lag:      0 seconds (computed 0 seconds ago)
  Apply Lag:          0 seconds (computed 0 seconds ago)
  Average Apply Rate: 7.00 KByte/s
  Real Time Query:    OFF
  Instance(s):
    orcldg
      Warning: ORA-16714: the value of property ArchiveLagTarget is inconsistent with the database setting

Database Status:
WARNING

2、查看不一致参数，broker里的值为0，参数文件里为60
DGMGRL> show database orcldg inconsistentProperties;
INCONSISTENT PROPERTIES
   INSTANCE_NAME     PROPERTY_NAME      MEMORY_VALUE         SPFILE_VALUE       BROKER_VALUE 
          orcldg         ArchiveLagTarget                   60                   60                    0 

3、确认参数文件里的参数
SQL> show parameter archive_lag

NAME                   TYPE        VALUE
------------------------------------ ----------- ------------------------------
archive_lag_target           integer     60
SQL> 

4、使用broker修改参数
DGMGRL> edit database orcldg SET PROPERTY ArchiveLagTarget=0;
Property "archivelagtarget" updated
DGMGRL> 
5、查看DG状态,告警无
DGMGRL> show database orcldg;

Database - orcldg

  Role:               PHYSICAL STANDBY
  Intended State:     APPLY-ON
  Transport Lag:      0 seconds (computed 1 second ago)
  Apply Lag:          0 seconds (computed 1 second ago)
  Average Apply Rate: 6.00 KByte/s
  Real Time Query:    OFF
  Instance(s):
    orcldg

Database Status:
SUCCESS

DGMGRL>