OGG-00726
The number of Oracle redo threads ({0,number,0}) is not the same as the number of checkpoint threads ({1,number,0}). EXTRACT groups on RAC systems should be created with the THREADS parameter (e.g., ADD EXT
Cause
The RAC system has the specified number of redo threads (instances) but the Extract group is not configured to read the same number of threads. Data will be missed.
Action
You need to redirect Extract to capture from all RAC instances by doing the following: Issue STOP EXTRACT in GGSCI, then issue DELETE EXTRACT. Next, if the database is Oracle Enterprise Edition 10.2 or higher, issue DBLOGIN as a user with the privileges listed in the DBLOGIN documentation. Finally, issue ADD EXTRACT to add back the group with the same name. Do not change the name. Include the following options in the command: TRANLOG and BEGIN with a begin time. Set BEGIN to the timestamp of the earliest record that the old Extract captured.