Need help on memory utilization.

I have run the utility nmon in aix 6.1, and found memory utilization is 99.9% in physical.

and pressed h key and then t , in that it is not showing single process which is consuming memory resources. please help me how to find out actual memory utilization.

wheather 99% is real memory utilization.

Whats wrong with that?
The real question is "am I swapping??"
lsps - a will give you that information...
It leaves you to find out what the resource is used for... On system like AIX unused RAM is something intolerable so you leave it for a certatin time and the system will happily find some use like filesystem cache etc... and of course should be able to give that resource back if claimed by an application.. or new process....