Determining Gaps in Logical Standby

Question

DB version: 11.2
For determining the gaps for Physical Standby DB, I use the queries mentioned in the post below
StandbyDB is not in sync with primary
For checking if a Logical Standby and Primary is in Sync, Can I use the same query ? Do I have to consider any other factors for Logical standby when checking for gaps ?

Answer 1

Hello;
Which part of that huge post! I'm thinking No, because that is not a Logical Standby.
On a logical standby database, query the DBA_LOGSTDBY_LOG view on the logical standby database :
COLUMN FILE_NAME FORMAT a55
SELECT
  THREAD#, SEQUENCE#, FILE_NAME
FROM
  DBA_LOGSTDBY_LOG L
WHERE
  NEXT_CHANGE# NOT IN
    (SELECT FIRST_CHANGE# FROM DBA_LOGSTDBY_LOG WHERE L.THREAD# = THREAD#)  ORDER BY THREAD#, SEQUENCE#;The Data Guard Concepts and Administration Oracle document should have a "Redo Transport Services" section on this.
Another one, also run on the logical standby :
SELECT
  SUBSTR(FILE_NAME,1,100) FILE_NAME, SUBSTR(SEQUENCE#,1,10) "SEQ#",
  FIRST_CHANGE#, NEXT_CHANGE#, TO_CHAR(TIMESTAMP, 'HH:MI:SS') TIMESTAMP,
  DICT_BEGIN BEG, DICT_END END, SUBSTR(THREAD#,1,4) "THR#"
FROM
  DBA_LOGSTDBY_LOG
ORDER BY
  SEQUENCE#;
  Best Regards
mseberg