We observed that the time taken to register datasets rose dramatically.
![](/download/attachments/4784884/plot1.png?version=2&modificationDate=1202155497000&api=v2)
Possible causes:
- Tom's was attempting to delete an old task with 1.5million datasets, starting at about 8am January 29. This request never completed and was canceled at about 5pm on January 29
- Karen attempted to set up materialized views on the dataset table, at around 11am on January 29.
- Glastlnx11 was importing large amounts of housekeeping data (exact time?)
- There were problems with the nightly backup on January 29/30 night, it was restarted and ran for much of the day on January 30.