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Home > Success Center > Network Performance Monitor (NPM) > NPM - Knowledgebase Articles > Calculate the current throughput on an F5 BIG-IP

Calculate the current throughput on an F5 BIG-IP

Table of contents
Created by Niall Fitzgerald, last modified by MindTouch on Jun 23, 2016

Views: 3,514 Votes: 0 Revisions: 7

Overview

This article describes how to calculate the throughput on an F5 BIG-IP system.

Prerequisite

  1. Gather the required throughput data based on the specific OID required (in terms on bits per second).
  2. Poll the device and perform some ancillary calculations.

Environment

  • All NPM versions
  • F5 Big IP

Steps

  1. Perform two separate polls on each OID, at an interval of your choice.
  2. Calculate the delta of the two poll values.
  3. Perform a calculation on those OID deltas on each graph metric.
Performance Graph
(Configuration utility)
Throughput
(summary graph)
sysStatClientBytesIn (.1.3.6.1.4.1.3375.2.1.1.2.1.3) sysStatClientBytesOut (.1.3.6.1.4.1.3375.2.1.1.2.1.5)
sysStatServerBytesIn (.1.3.6.1.4.1.3375.2.1.1.2.1.10) sysStatServerBytesOut (.1.3.6.1.4.1.3375.2.1.1.2.1.12)
Client-side Throughput
(detailed graph)
Server-side Throughput
(detailed graph)
HTTP Compression Rate
(detailed graph)
The following shows an example of how to collect data on throughput rates for the Server Bits in graph metric:
  1. Poll OID sysStatServerBytesIn (.1.3.6.1.4.1.3375.2.1.1.2.1.10) twice, at a 10-second interval.
    This results in two values, <sysStatServerBytesIn1> and <sysStatServerBytesIn2>.
    Note: 
    Although this example uses an interval of ten seconds, the interval can actually be any duration that you choose.
  2. Calculate the delta of the two poll values:
    <DeltaStatServerBytesIn> = <sysStatServerBytesIn2> -
    <sysStatServerBytesIn1>
  3. Calculate the value of the  Server Bits In graph metric using the calculation shown in the table:
    (<DeltaStatServerBytesIn> / <interval>), where the value of <interval> is 10.
 
Performance Graph
(Configuration utility)
Throughput
(summary graph)
Throughput
(detailed graph)

 

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