public void switchThrottleState(MasterProcedureEnv env, boolean rpcThrottleEnabled)
    throws IOException {
    rpcThrottleStorage.switchRpcThrottle(rpcThrottleEnabled);
  }
The procedure to switch rpc throttle
hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/SwitchRpcThrottleProcedure.java