When configuring the capacity scheduler capacity and maximum-capacity, it allows the maximum-capacity to be less then the capacity. I did not test to see what true limit is, I assume maximum capacity.
output from mapred queue -list where capacity = 10%, max capacity = 5%.
Queue Name : test2
Queue State : running
Scheduling Info : queueName: "test2", capacity: 0.1, maximumCapacity: 5.0, currentCapacity: 0.0, state: Q_RUNNING,