Oracle Data Guard switchover checklist

ON STANDBY SITE

SQL> select * from v$version;

BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
PL/SQL Release 11.2.0.3.0 - Production
CORE	11.2.0.3.0	Production
TNS for Linux: Version 11.2.0.3.0 - Production
NLSRTL Version 11.2.0.3.0 - Production

SQL> select database_role from v$database;

DATABASE_ROLE
----------------
PHYSICAL STANDBY

SQL> select name,value from v$parameter where name in ('log_archive_dest_1','log_archive_dest_state_1','log_archive_dest_2','log_archive_dest_state_2');

NAME			  VALUE
------------------------- ----------------------------------------------------------------------------------------------------
log_archive_dest_1	  location=/u01/app/oracle/arch
log_archive_dest_2	  service=zhongwc async lgwr register valid_for=(online_logfile,primary_role) db_unique_name=zhongwc
log_archive_dest_state_1  enable
log_archive_dest_state_2  enable

SQL> select distinct status from v$datafile;

STATUS
-------
ONLINE
SYSTEM

SQL> select distinct open_mode from v$database;

OPEN_MODE
--------------------
READ ONLY WITH APPLY

SQL> SELECT DISTINCT thread#,MAX(SEQUENCE#) OVER(partition BY thread#) maxseq_ FROM v$archived_log;

   THREAD#    MAXSEQ_
---------- ----------
	 1	   13

SQL> select max(SEQUENCE#) "LAST_LOG_APPLIED" FROM V$ARCHIVED_LOG WHERE THREAD# = 1 and APPLIED='YES';

LAST_LOG_APPLIED
----------------
	      13

ON PRIMARY SITE

SQL> SELECT DISTINCT thread#,MAX(SEQUENCE#) OVER(partition BY thread#) maxseq_ FROM v$archived_log;

   THREAD#    MAXSEQ_
---------- ----------
	 1	   13

SQL> select max(SEQUENCE#) "LAST_LOG_APPLIED" FROM V$ARCHIVED_LOG WHERE THREAD# = 1 and APPLIED='YES';

LAST_LOG_APPLIED
----------------
	      13