optional string type = 1;

  // value contains the amount of change which is permitted by the policy.
  // It must be greater than zero
  optional int32 value = 2;

  // periodSeconds specifies the window of time for which the policy should hold true.
  // PeriodSeconds must be greater than zero and less than or equal to 1800 (30 min).
  optional int32 periodSeconds = 3;
}

    logging:
      level: "default:info"

    # Kubernetes >=v1.11.0 will create two PriorityClass, including system-cluster-critical and
    # system-node-critical, it is better to configure this in order to make sure your Istio pods
    # will not be killed because of low priority class.
    # Refer to https://kubernetes.io/docs/concepts/configuration/pod-priority-preemption/#priorityclass

    logging:
      level: "default:info"

    # Kubernetes >=v1.11.0 will create two PriorityClass, including system-cluster-critical and
    # system-node-critical, it is better to configure this in order to make sure your Istio pods
    # will not be killed because of low priority class.
    # Refer to https://kubernetes.io/docs/concepts/configuration/pod-priority-preemption/#priorityclass

  //
  // BorrowingCL(i) = round( NominalCL(i) * borrowingLimitPercent(i)/100.0 )
  //
  // The value of this field can be more than 100, implying that this
  // priority level can borrow a number of seats that is greater than
  // its own nominal concurrency limit (NominalCL).
  // When this field is left `nil`, the limit is effectively infinite.
  // +optional
  optional int32 borrowingLimitPercent = 4;
}

  //
  // BorrowingCL(i) = round( NominalCL(i) * borrowingLimitPercent(i)/100.0 )
  //
  // The value of this field can be more than 100, implying that this
  // priority level can borrow a number of seats that is greater than
  // its own nominal concurrency limit (NominalCL).
  // When this field is left `nil`, the limit is effectively infinite.
  // +optional
  optional int32 borrowingLimitPercent = 4;
}