JMeter-: For Load and Performance Testing..

JMeter

Overview

SUMMARY

.Introduction

.What is Jmeter?

.Why ?

.Preparing tests

.Step 1 Proxy server

.Step 2 Organization

.Step 3 Genericity

.Step 4 Assertions

.Running tests

.Non GUI mode

.Distributed testing

.Analyzing Test

Introduction

.Definition :

.JMeteris an Apache Jakarta project that can be used as a

load testing tool for analyzing and measuring the

performance of a variety of services, with a focus on web

applications.

.Why ? :

.JMeter can be used as a unit test tool for JDBC database

connection, FTP, LDAP, WebServices,J MS, HTTP and

generic TCP connections. JMeter can also be configured

as a monitor, although this is typically considered an ad-

hoc solution in lieu of advanced monitoring solutions.

 

Proxy Server

Role

.Record Http requests run by

users.

.Stick to the exact http

request a lambda user .

.Record only what is

meaningful.

.To be organized.

.Warning

.Doesn’t record https.

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Organization

Thread groups

Loop controllers

.Determine

.How many users, will

concurrently run the tests

.How long between 2 launch

of the test

.How many times the tests

will be run

.Determine in a thread group

.How long between 2 launch

of the same sampler

.How many times the set of

tests will be run.

Organization

Thread groups

Loop controllers

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Organization

Throughput Controller

.Make variable pause during

the test run to simulate better

a client behavior.

.Because the thread group

doesn’t take in count the

server, can take several

seconds before responding.

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Genericity

.Variabilisation :

.In order not to modify a test to run it on different

machines

.Example : user and password changing from a shelf to an

other

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Genericity

.Http default Request

.Allows you to put a default ip port and path for all the

Http Request contained in the scope

.Gives you an easy way to run your test from a device to

an other one just by changing the default adress.

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Genericity

.Regular Expression extractor

.If the data has to be used several times along the test

.Like a sessionId for instance.

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Assertions

.Response assertion

.To match a pattern in the response code

.The response code for instance.

.Xpath assertion

.Using the DOM of the response to check if an element

appear.

.A research result for instance.

.Size assertion

.To know if the size of the response received match with

the size expected

.To verify if the file received is the good one.

Running tests

.Non Gui Mode

.Why?

.The stress due to test and display is too high when running

distributed tests.

.How ?

.By running command line

Example : jmeter -n -t my_test.jmx -l log.jtl -H my.proxy.server -

P 8000

Distributed testing

.Why ?

.To simulate stressed environment with a lot of clients.

.How ?

.Edit “remote_hosts=127.0.0.1” in jmeter.properties

.Start jmeter_server.bat on the host machines

.Run jmeter.bat

Analyzing Test

Aggregated graph

Result tree

.Gives all the statistics

concerning the tests

.May be recorded in a

specified file for further

treatment (data mining)

.Gives in a tree form, all the

samplers results, the

requests, and the sampler

data.

.May also be recorded in a

specified file for further

treatment

Analyzing Test

Aggregated graph

Result tree

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