I have converted my application from an 8.1.7db to a 9.2.0.1db. It takes the 9i db twice as long as 8i to processes the same queries. I have converted all indexes and analyzed all tables. When I created the db I made the mistake of using a 4k block size on 9i but had an 8k block size on 8i. Should this effect performance this severely?

Other differences:
o 9i uses LMT as opposed DMT