Truncate BI - Any Progress Guru's? HELP!

Had a appserver run for over 43 hours this weekend, grew the BI to 36GB. Currently Truncating the BI, process has been running for over 5 hours, odd thing is BI is growing...Started Truncat at 36GB, now at 44GB. DB time stamp is current. Support says let it run.

Any one seen this behavior?

(Progress 10.1B)