Hi,
To update this forum.... after spending several months with IBM on this case, they decided that they won't fix it for now and it needs a new ODS.
They are also waiting for enough client to report it to take it to the top of the queue.
If you face similar error please report it so that IBM give it more attention.
This error is available since 8.5 version and IBM didn't fix it yet !!!
IBM Domino Server is not very friendly with large databases, and disabling this option will make it even worse...
We are expecting to improve performance with new releases not to worsen it.
Best Regards,
Samer Ghosn