Optimizing the Performance of Your Software Applications

5 Things To Do When Load Testing

Load testing involves the design and execution of tests to examine the
performance of a system. The objectives of load testing are to measure a
system’s behavior patterns under certain conditions and determine its
capabilities. Running different tests on your website or application will
produce many outcomes depending on the configuration of your load tests. When
conducting load tests it is important to do these five things to ensure your
website or application undergoes quality tests.

Clear cookies and browser cache before recording traffic

While conducting load tests, it is important to clean your cookies and cache
such that when you record a user scenario, the browser cannot use cached data
to load client requests. Clearing cookies and cache ensures that the browser
sends and receives data and responses directly from the server.

Verify scenarios

When planning to conduct a load test, first ensure that the scenario you
intend to test has already been successfully executed for one virtual user.
This will allow you to identify any problematic attributes of the scenario and
help you fix those problems before-hand such that you may not relate them to
the number of virtual users or the testing conditions.

Record the scenarios right from the start of the browser

This is because recording scenarios after opening a few web pages will cause
the scenario’s playback to fail. This mostly happens due to failure of the
recorded traffic to repeat the authentication process which leads to the
tested web server ignoring further requests to do so.

Parameterize your scenarios

Creating variable values when conducting load tests allows you to achieve
realistic load results on the server. For instance, when you replace recorded
parameters with other values in the server, it allows you to receive
user-specific data in the request s from virtual users. Analyze the
possibilities of parameterizing through careful evaluation of the responses
and requests of the data transferred to and from the server. Parameterizing
scenarios creates an opportunity to include a wide range of behaviors to the
scenario to have it run as though its users are a unique group of individuals.

Don’t conduct load tests in real environments.

Load testing in a real environment where network traffic is high can alter the
results of the load test. This is due to the large data transfer in the
server. Always opt to use an environment that has the same behavior patterns
as a real environment but has no other traffic usage other than your scenario.

Resources:

https://make.wordpress.org/core/handbook/testing/automated-testing/

www.webhostingprof.com

https://tools.pingdom.com/

Learning About Load Testing

Load Testing vs. Stress Testing vs. Concurrent Testing

For every software that gets developed, it is highly significant to subject it to a vigorous series of tests prior to its release in the public, so that the manufacturers will become dependable in the consumers’ eyes, and the latter can get the most out of the technological advancement. There are various examination techniques that specialists in the industry make use of; however, the ones that have shown effectiveness are stress testingload testing,  and concurrent testing. Find out how each of them works bellows.

Load Testing

This is one form of performance testing that is accomplished by means of gradually aggregating the usage of the software until it reaches the limit. What this specific testing method aims to do is discover the toughest capacity that the application can handle. The way that the technicians are going to sample the endurance of a certain software may vary due at some point in time, but the typical process for examining computers is that the developer opens diverse applications one by one without closing any of them in order to see how much load it can carry.

Stress Testing

As what is apparent from the name of the activity, stress testing increases the pressure on the software so as to figure out how well it will do once the density goes beyond the specified limit. The intention of the experts who perform this test is to guarantee that the theoretical load capacity that they have released regarding the software is true, the work it has been made for is being done nicely, and the possible reasons why it will crash again in the future will be known.

Concurrent Testing

This test cannot be done on its own. Typically, the specialists act it out along with the functionality testing, as it requires the software to run multiple applications at the same time. This is one of the many ways that developers utilize to detect the bugs or errors that can come up when it is not only a single file that is functioning. In addition to that, this asserts the performance and the ability of the system to endure any issues that may affect it in normal situations.

Be sure to run your new software through the testing methods mentioned above.

Understanding The Term Load Testing

In the world of engineering, new developments carry both a risk of success or failure. Consequently, developers have to test new milestones before releasing them to clients. A load test is one of them. It falls under a bigger bracket called performance testing. It is aimed at testing the success of systems such as a computer or its applications, a network, a peripheral, or a server.

Any new development comes with the system’s specifications such as the speed limit, a maximum number of simultaneous users, etc. A load test will subject the system to these limits, and the developer gets to observe how the system behaves, according to LoadTesting. As a result, he can release the development in the market, or make a few corrections or totally scrap off the idea.

Another often confusing term is stress testing. Simply put, with stress testing, the aim is to see how far your system continues in operation after being subjected to extreme conditions. Whereas with load testing, the objective is to identify how much work the system can handle before failure.

Approach To Load Testing

There are two primary ways to apply load testing;
• Endurance testing (also known as longevity testing) – Investigates a system’s ability to withstand constant workload for long. Note that the workload here is moderate not extreme.
• Volume testing- The system is subjected to heavy workload but only for a short time.
With the above tests, the developer can identify the system’s component limitations, bugs, and bottlenecks.

Some popular tools you can use are:

http://www8.hp.com/us/en/software-solutions/loadrunner-load-testing/

Load-View-Testing.com

http://grinder.sourceforge.net/

A Practical Example

John, a software engineer, develops a new app ABC designed to help users shop online. Ideally, John should specify how many users the app can handle simultaneously. To test if his development works as per the specifications, John needs to run multiple programs on this app. The concept behind this is that while customers are shopping, cashiers are releasing invoices. Consequently, the store assistants are packing orders received from the orders department.

Another relevant test would be to redirect a significant amount of traffic to this app. In the real world, customers will be engaging this app for several reasons such as requests for quotations, complaining about the products bought, etc.

App ABC will either handle the load smoothly or give errors or the worst case scenario crash. Depending on how the app reacts, John will now develop solutions, test the app again until he is confident of his development. Only then should he release the app to his client.

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