> Can I delete the SYSTEM OBJECT filespaces > all together and gamble that I won't have to restore the > registry that day? Will deleting the "good" system > objects help with the orphans?
There is a less draconian version of this strategy that some sites have used successfully. Execute 'rename filespace' commands for the system objects. Subsequent backups will create new system object file spaces without the pathalogical behavior. After a few days the renamed filespaces can be deleted. If you needed to restore from a renamed filespace you could change it back to its original name. Even 'delete filespace' commands for the number of objects you mention are going to be a major undertaking. It may take you as much as several months to get rid of all the files. Be careful about running too many 'delete filespace' commands concurrently. I have never had occasion to delete a system object filespace, but my experience with other types of filespaces has been that anything beyond two concurrent 'delete filespace' processes is counterproductive.
