Performance statistics

Overview

Performance statistics provide categorized information about network throughput, and are obtained using SNMP. The information in a performance statistics record includes the following:

When the Suspect indicator in a record is set, the counters in the record contain the following values:

After a suspect record collection, the next non-suspect record may contain a large value that is seen as a dramatic increase. Such an increase skews the data value for the interval and may result in misinterpretation. To alleviate this, an operator can configure a System Preferences parameter to increase, rather than reset, the Periodic Time value after the collection of a suspect record. For example, for a 15-minute collection interval, if one record is suspect and the next is not, the periodic time of the second record is recorded as 30 minutes. In this way, the NFM-P presents the first non-suspect record collected after a collection failure using a more realistic average value. See the NSP System Administrator Guide for information about setting system preferences.

Table 10-2: Performance statistics record properties

Property

Description

Monitored Object

Unique identifier of the object from which the statistics are collected

Monitored Object Name

Name of the object from which the statistics are collected

Periodic Time

Number of milliseconds since previous statistics collection

Record Type

The type of record, based on the following collection types:

  • Scheduled Full

    Performed according to a user-configurable schedule

  • On-demand

    Performed immediately at the request of an NFM-P operator

Site ID

NE identifier

Site Name

NE name

Suspect

Indicates a statistics collection failure.

Time Captured

Unix Epoch time at which the statistics were collected and the NFM-P adds the log to the database

Time Logged

Time at which the NFM-P receives the SNMP get-response

Table 10-3: Performance statistics data types and examples

NE data type

NFM-P data type

Example

Counter32

long

32-bit counter such as Received Octets in the Interface Stats group

Gauge32

Unsigned32

TimeStamp

Counter64

UINT128

64-bit counter such as Received Broadcast Packets in the Interface Additional Stats group

Integer32

double

Radio output power, in tenths of dBm; NFM-P converts to dBm

Integer32

float

Port output power, in tenths of µW

Integer32

int

Small value, such as index, enumerator, or identifier

TruthValue

Boolean

State indicator

various

String

MAC address, object name