The JMeter Open Model Thread Group

In previous blog posts we covered how the basic Thread Group is extended to perform more advanced functionality through the Custom Thread Groups package, and other similar plugins such as the Arrivals Thread Group.  One that we have yet to discuss is the Open Model Thread Group.  Presently, this built-in thread group is still marked as experimental, however it is available and used in current production releases in JMeter. Conceptually the Open Model Thread Group isRead More →

JMeter Thread Group

As the essential component that contains samplers and logic controllers, the Thread Group is the element that most JMeter tests start with. JMeter uses a Thread Group as the container to define a collection of simulated users. In this way, one or more requests contained within the Thread Group will follow a prescribed virtual user count, ramp-up time, and looping over this configuration if desired. Above is an example of how a basic Thread Group mightRead More →

Continuously Increase Load with the JMeter Arrivals Thread Group

When you want to determine the ultimate load of a system, the JMeter Arrivals Thread Group allows the test designer to set a rate by which the load test will continuously increase requests.  By extension, this component is also useful in certain cases where it is desirable to increase request rates exponentially. In a previous post we outlined the various plugins in the Custom Thread Groups package for JMeter. In addition to the most commonly usedRead More →

Using the JMeter Dummy Sampler

  When designing your JMeter test locally, it is useful to have target endpoints to test against. Depending on your test logic, this may even be a requirement. However, a suitable environment for making these requests is not always available. To avoid generating an unknown number of uncontrolled requests against real endpoints, there  the JMeter Dummy Sampler.  In this brief post, we will show you how to add the Dummy Sampler to your load test andRead More →

JMeter plugins

One of the greatest strengths of JMeter is its extensibility with plugins. You can add a plugin to a JMeter test to perform just about any action you can think of for a load test. We will summarize the abilities of the most popular JMeter plugins in the JMeter Plugin Catalog, giving insight to how the top users of JMeter are constructing their load tests. Thread Groups and Test Architecture Custom Thread Groups – This isRead More →

Random Data in JMeter Performance Tests

In a related post, we discussed how to parameterize your JMeter tests from a CSV source file. In this article we will take things a step further, and show you how to introduce variability into your requests by pulling from your CSV source file to have random data in your JMeter performance tests. Random CSV Data Set Config Plugin Building upon the functionality of the CSV Data Set Config plugin that ships with JMeter, there isRead More →

filter the JMeter Dashboard Report

When you run a JMeter load test on RedLine13 with output files enabled, a JMeter Dashboard Report is automatically generated. The results complement the RedLine13 test results page. In certain use cases it may be necessary to filter the data displayed and recreate the report on a subset of that data. In this post, we will cover how the report is generated, and how to filter the JMeter Dashboard Report to display customized results. How isRead More →

RedLine13 Security Updates

We have made RedLine13 security updates that address a JMeter security vulnerability and we’ve added MFA for RedLine13 login. These changes are available for Enterprise users. JMeter Vulnerability JMeter has an active security vulnerability #5766 that will be fixed in JMeter 5.5.1. But that release is not available yet so RedLine13 has fixed this vulnerability until JMeter 5.5.1 is available. This has a severity of critical and exploiting this vulnerability could potentially allow for remote codeRead More →

Protecting Sensitive Data

One of the primary functions of a load test is to vet target test applications to see how well they can hold up to production conditions. In that endeavor it is sometimes necessary to provide login credentials and other protected information to be used in conjunction with these tests. This can present a challenge in protecting sensitive data when load testing in the cloud. In this post, we will cover how to test with JMeter inRead More →

A Guide to JMeter Preprocessors and Postprocessors

When building your JMeter test, samplers provide the core functionality. They are responsible for sending the actual HTTP requests and handling those responses. However, as your test becomes more complex and sophisticated, it may be desirable to add conditional logic to your requests. Furthermore, you may wish to dynamically process the inputs and outputs to these. JMeter provides this functionality though a host of preprocessors and postprocessors. This brief post will serve as a guide toRead More →