Performance and Load Testing

 Introduction to Performance Testing.
 Load Testing.
 Difference between Performance, Load
Testing.
 Why Performance Testing.
 When is it required?
 Process of Testing.
 Testing Tools.
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 It is a process of determining the speed or
effectiveness of a computer, network,
software program or device.
 Factors of Performance testing:
 Response Time
 Throughput
 Capacity
 Stability
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 It is defined as the delay between the point
of request and the first response from the
product.
 It Increases proportionally to the user load.
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 Ability to handle multiple transactions in a
given period.
 When the number of users increase, the
throughput almost increase with the number
of requests.
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 Test behavior of the software under load and
peak conditions.
Eg:
Testing a word processor in a very large document.
Running multiple applications simultaneously.
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 Identifies problems early on before they
become costly to resolve
 Develop more quality and scalable product.
 To make sure the product meets response
time, throughput etc..
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 It can be started from the requirements gathering phase and
continue until deployment phase of the software for reduce the
cost and time to rework.
 Planning and Design Phase
Identify the best configuration for software when there are
accessing thousands of users.
 Development Phase
Detect breaking points, unnecessary codes and bottlenecks
in the software.
 Deployment Phase
To check the minimum requirements (Hardware / Software)
for the application are to runs it properly.
 Maintenance Phase
Identifying reasons/ factors which effect for degrade the
performance of the software.
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 Identify the Test Environment
Identifies the Environment including hardware,
software and network configurations. This process
will help to testers for create more effective tests.
 Identify Performance Acceptance Criteria
It’s very important when initiate early in the
application’s development life cycle and it records
the acceptance criteria of the application.
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 Plan and Design Tests
It defines roles and responsibilities, test schedule,
test environment preparations, etc….
 Test Design is about type of test to be conducted,
metric to be measured, metadata, scripts, etc…
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 Configure the Test Environment
Do the preparations for the testing environment.
Arrange tools and other resources.
 Implement the Test Design
Construct the performance test by following on test
design.
 Execute the Test
Do the execution and monitor tests.
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 Analyze Results, Report, and Retest
collect the output of monitoring and converts them into
one format.
There are two types of reports,
1. First report includes graphic and basic information.
2. Second report includes profound information and statics
about the system.
Retest and check whether there is an improvement or
decrement of the performance.
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 Open Source
Apache JMeter
Tsung
Grinder
 Commercial
IBM Rational Performance Tester
Borland silk performer
Load Runner
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 100% Java desktop application.
 For web and FTP, Java, SOAP/XML-RPC, JDBC
applications
 Advantages:
Open Source
Various target systems.
Extensibility.
 Drawbacks:
Necessary to start remote machine one by one.
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 Works on Windows, Mac, Linux, AIX platforms.
 Support to Citrix, Socket Recording, Web HTTP,
SOA, SAP protocols.
 Advantages:
Support XML
No programming knowledge required.
Run with large multi users tests.
 Drawbacks:
Java Applet based applications not supported.
Scheduling is not possible.
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Performance and Load Testing

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