IntervalUtilization
A percentage value that represents the utilization perfor- mance measurement in a previous 15 minute measurement interval. In the case where the agent has no valid data available for a particular interval the corresponding object instance is not available and upon a retrieval request a corresponding error message shall be returned to indicate that this instance does not exist (for example, a noSuchObject error for SNMPv1 and a noSuchInstance for SNMPv2 GET operation). In a system supporting a history of n intervals with IntervalUtilization(1) and IntervalUtilization(n) the most and least recent intervals respectively, the following proce- dure is used to update the intervals at end of a 15 minute interval: - discard the value of IntervalUtilization(n) - the value of IntervalUtilization(i) becomes that of IntervalUtilization(i-1) for n >= i > 1 - the value of IntervalUtilization(1) becomes that of current 15-minute %utilization.