Could u tell me last applyed archive log in disaster recovery server

Question

Hi DBA'S,
we are using oracle 9.2.0.8 my production database has dr(our dr is not a stand by it is created in diff way) server every time one cron job sync the database and transfer the new logs from production server to dr server. i want to know last applied archive in dr server.
i am using this query select max(sequence#) from v$log_history; it is showing same results in boath production and dr when ever we backup 2 days before archive to some backup directory sync is going to fail
please tell me correct query to find out the last applied archived log in dr server
Thanks&Regards
Tirupathi

Answer 1

we are using oracle 9.2.0.8 my production database has dr(our dr is not a stand by it is created in diff way) server every time one cron job sync the database and transfer the new logs from production server to dr server. i want to know last applied archive in dr server.i am using this query select max(sequence#) from v$log_history; it is showing same results in boath production and dr when ever we backup 2 days before archive to some backup directory sync is going to fail
please tell me correct query to find out the last applied archived log in dr server>
As you are running cron job to bring the dr in sync, i suppose v$log_history might give you the wrong results.In your case check :-
select sequence#,applied from v$archived_log where applied='YES';
select max(sequence#) from v$archived_log where applied='YES';Would like to know, why manual recovery (archive logs being manually applied) is being performed, and not automatic.
In case you switch to automatic below query would be useful :-
select al.thrd "Thread", almax "Last Seq Received", lhmax "Last Seq Applied"
    from (select thread# thrd, max(sequence#) almax
            from v$archived_log
           where resetlogs_change#=(select resetlogs_change# from v$database)
           group by thread#) al,
         (select thread# thrd, max(sequence#) lhmax
           from v$log_history
            where first_time=(select max(first_time) from v$log_history)
           group by thread#) lh
          where al.thrd = lh.thrd;Refer [http://aprakash.wordpress.com/2010/07/21/use-of-varchived_log-and-vlog_history-on-physical-standby/]
HTH
Anand