Load Testing & Apache JMeterChuck HillGlobal Village Consulting, Inc.WOWODC 2010

• Why?

• What?

• When?

• Where?

• How?

What, Why, How?

Planning for Load Testing

• Time

• Tools

• Equipment

• Information

• Lots of data

JMeter Components

HTTP Cookie Manager

HTTP Request Defaults

Thread Group

Sampler

Listeners

Timers

Assertions

Test Parameterization

• Parameterize for

• different environments

• different scenarios

• different data

• Start Early!

Parameters on Test Plan

Thread Group Parameters

Thread GroupSpecific Parameters

Complications of WOe

• URL is recorded in Sampler so...

‣ Session ID and Instance Number

➡HTTP Cookie Manager

‣ Context ID

➡A problem, but only in loops

Session ID and Instance Number

Use Matches in URL

Find Context ID

Use Context ID

Recording Tests

• Record and refine

• Use Selenium for repeatability

• Run tests slowly

Recording Problems

• ERXSwitchComponent

-Der.extensions.WOSwitchComponent.patch=false

• Copy and Paste to Test Plan

Delays for Reality

• Pause for realistic results

• Constant Timer

• Gaussion Random Timer

• Uniform Random Timer

• Combinations of Timers

Ajax!

• The good news...

• The bad news...

• XPath Extractor

• JavaScript

• AjaxUpdateContainer and friends

Data Driven Tests

Upload Problem

Running the Tests• Run from GUI

• Run from command line / script

• Run from multiple machines

Evaluating Test Results

• JMeter Reporters (Listeners)

• response times: min, max, avg, std dev

• error count

• ActivityMonitor.app & ServerAdmin.app

• memory, CPU, network

• JavaMonitor

• Transaction Average, Average Idle Period

Summary Report

Creating Effective Tests

• Work as super-user

• Use Selenium tests as base

• Run against known DB backup

• Parameterize tests

• Use assertions

Creating Readable Tests

Q&ALoad Testing and Apache JMeterChuck HillGlobal Village Consulting