I have got a situation which I could not explain might need some guidance .
Here is the StasByCube before reordinging.
Before:
Number of Populated Numeric Cells 50629
Number of Fed Cells 59822407
Memory Used for Feeders 1648361472
Memory Used for Input Data 4191232
Total Memory Used 1652552704
After:
Number of Stored Calculated Cells 582
Number of Populated Numeric Cells 30343286
Number of Fed Cells 0
Memory Used for Feeders 0
Memory Used for Input Data 620753920
Total Memory Used 620753920
Please notice that, the feeder is "0"

I did unload the cube after the dimension reordering , and issued a reprocessfeeder TI , however , the TI completed within a second and feeder did not seem be reprocessed at all , as I am using persistent feeder , the feeder file is still the one before dimension reordering .
Also, the feeder is still working

Please shed some light on this, any idea is appreciated and welcome.