I think that might be the correct direction. Unfortunately changing the priority of the whole process does not help. Can you use ProcessHacker http://processhacker.sourceforge.net/downloads.php to change the priority of the indexing thread, especially the IO-priority?
- Don’t forget to run process hacker as administrator, otherwise it won’t show the priorities
- Click on UrBackupClientBackend.exe
- Click on the threads tab
- Increase the IO-priority of the yellow -4 thread
In my case the indexing became really slow when the software raid was being rebuild. Unfortunately one cannot fine tune the IO-priority much. I can only set it to background or not.