Why VuGen is an old gen?

New generation programmers do not program in C. This is the sentence I have learnt on the latest Loadrunner training I was teaching. University students study C and C++ programming language optionally nowadays and when they do, they only use it for a semester. Moreover they are quickly seduced by programming languages running in managed […]

Sharing Load Generators in HP Performance Center

Load Generator

One of the most appealing features of HP Performance Center is the automatic resource management. The Performance Center infrastructure can be shared between multiple test projects. Each project bundles the test scripts, test data and the associated load test configurations. Several load generators (aka. hosts) can be assigned to a Performance Test Project. From the […]

Using LR Download Filter to protect your measurements

This post will show how to exclude calls to external systems using Loadrunner; this allows the AUT to be tested in isolation.  A typical webpage relies on a number of resources which are external to the site. Analytics services, embedded social media, advertising assets and different Google Services (maps, charts, etc.) are good examples for […]

Modeling spike tests with HP Performance Center

This post will show how to create a Performance Spike Test using HP Performance Center. Spike testing can be characterised as an abnormal surge in traffic for a short period.  Reasons can include: An advertising campaign has just been launched, special offers being made available or an offer has just been opened and there is pent up demand.  Modelling […]

Creating Custom Metric Graphs with HP Loadrunner

perfcenter-userdatapoints

This post will describe how to create your own custom metric graphs in HP Loadrunner. Using the Analysis tool you can view the standard metrics of a Load Test. But you can also use the VuGen scripts to report your own numbers as ‘User Data Points’ and feed them into the Analysis component. Let’s assume you […]

Pacing Loadrunner User Scenarios

Configuring the virtual user script with the number of virtual users

This article will describe the different options for pacing available within Loadrunner and outline how they can be used.  In the pervious blog  we calculated the necessary number of virtual users to produce the desired load.  The previous formula relied on the length of the user scenario. How does the load generator execute the script? The generator starts […]

Calculating the number of Virtual Users to achieve the target load using HP Loadrunner

Configuring the virtual user script with the number of virtual users

With Performance Center you can configure the number of virtual users for your test scenario. This blog describes how to use it with the scenario runtime length to target the test system with the required load. Business requirements (if there are any) should state how much load the website is expected to handle. The definition […]

Avoiding HP Performance Center installation problems

Recently I installed HP Performance Center internally onto my companies infrastructure (Version 9.52). In this post I would like to share my experiences and give you some tips on how to avoid the installation problems I encountered. HP Performance Center is a comprehensive enterprise-grade software solution for executing, monitoring and reporting load tests. The logical structure of the product has […]