I have a cube with two partitions ( over time ). One with recent data and one with older. Processing the two partitions takes 1 second for one and 4 seconds for the other. That's ok and pretty fast. But when the virtual cube is processed it takes 1 minute 3 seconds. Those are small cubes with small fact tables. 9000 rows tops. As I understand the vitual cube doesn't really exist, it's just pointers or indexes over the real data. I don't undestand why the virtual cube processing takes so much time. Where do I have to start looking for this slow processing ? Where the problens might be ? Please give me some directions to as where to start looking. Thanks.