Logical Standby & Primary site Time Diiference

Question

Hi,
I have the one primary site over RAC configuration and one Logical standby
Site.We have configured the Logical standby for archived files. We would like to
know, how can we compute the time difference between Primary Site and Logical
Site ex. IF suppose some SCN XYZ is applying on logical standby site so when
the same SCN (XYZ) generate (time) on the primary site. We need exact time
difference between Primary site and Logical Site.
If there is any query or other method pls suggest to find out this information.
Thanks, Dewan

Answer 1

Hi,
From memory, I use this:SELECT
     TO_CHAR(MIN(TIME),'YYYY-MM-DD HH24:MI:SS') OLDEST,
     TO_CHAR(MAX(TIME),'YYYY-MM-DD HH24:MI:SS') NEWEST,
     MAX(TIME)-MIN(TIME) DELTA FROM
SELECT L.SEQUENCE# SEQ, L.FIRST_TIME TIME,
    (CASE WHEN L.NEXT_CHANGE# < P.READ_SCN THEN 'YES'
          WHEN L.FIRST_CHANGE# < P.APPLIED_SCN THEN 'CURRENT'
          ELSE 'NO' END) APPLIED
  FROM DBA_LOGSTDBY_LOG L, DBA_LOGSTDBY_PROGRESS P
  ORDER BY SEQUENCE#
WHERE APPLIED != 'YES';Regards,
Yoann.
PS: This does not work for Archived Redo Logs not yet sent to Logical Standby:
Message was edited by:
Yoann Mainguy