I am a bit confused about some of the sysctl options, looking at "sysctl -d"

vm.anonmin: Percentage of physical memory reserved for anonymous 
application data
vm.anonmax: Percentage of physical memory which will be reclaimed from 
other usage for anonymous application data

Say I have the following settings:

vm.anonmin=5
vm.anonmax=50

vm.anonmin reserves 5% of physical memory, then say it gets used up by 
different applications. If I understand this correctly, vm.anonmax 
states the maximum amount of physical memory which will be reclaimed 
from other usage if the physical memory reserved by vm.anonmin is all 
taken. What will happend if the requirement for anonymous application 
data grows beyond 55% (vm.anonmin + vm.anonmax) of total physical 
memory? Will the system become unstable and freeze, or will it just use 
swap space on the hard disk? What is anonymous application data?