tune buffer sizes

i have to add the parameters

em/initial_size_MB= PM

em/max_size = 100000

when i entered the value of max_size = 100000

value is not permitted default is 64000

and one more thing is

rdisp/ROLL_MAXFS = [BE] * 100

rdisp/ROLL_SHM = [BE[ * 100

please can you give me the details of value for this its very urgent

Thanks very much