Caps can be configured so that they will not be enforced until the physical memory available to processes is low. The minimum (and default) value is 0, which means that memory caps are always enforced. To set a different minimum physical memory utilization for memory cap enforcement, type:
# rcapadm -c percent
The percent value should be in the range 0 to 100. The current global physical memory utilization and its cap can be obtained by using the -g option to the rcapstat command. See Reporting Global Memory Caps.