One of the most important part of a load test is to view, save and compare statistics. In loadUI there are several ways to do this:
1. The Statistics Workbench
The Statistics Workbench is the most powerful way to analyze results in loadUI. It allows you to view live statistics for components, assertions and server monitors — from the current run as well as comparing and printing old Results. The Statistics Workbench opens in a separate window and has its own toolbar and menu.
The Results Workbench
The Statistics Workbench button is placed in the project views upper right corner:
2. The Summary Report
It is possible to generate a report once a test is completed, which will give the results of the test, including such information as the number of samples run, and the number of assertions passed, and the number of assertions failed, as well as the statistics for the run. It will display this on both on the level of the project as a whole, as well as breaking it down to the component level. Each TestCase within a project has a separate section of the report, with a similar breakdown.
The Summary Report
The Summary Report button, placed in the project view's upper right corner, is only enabled once the test has been completed:
Read more about the Summary Report in The Summary Report article.
3. Components
3.1. The TableLog Component
The TableLog Component displays the actual input that it receives, and can save it to a file for later analysis. It is particularly useful when connected to the output of the statistics component, since this will allow you to see the actual data, and possibly use it later.
TableLog Component
To just log Virtual Users that matches a certain criterion (e.g. TimeTaken above 100ms), connect it to a Condition component. Read more about this here.
3.2. The Statistics Component
The Statistics component is a custom component, meaning it's not bundled with loadUI, but can be downloaded for free. In most cases it’s less powerful than the Statistics Workbench, but the fact that it’s a project component can have its advantages in certain cases. One case when the Statistics component is useful is if you want connect some kind of logic to statistical values, e.g. connect a Condition component after it, that evaluates the average Response time and take different action depending on the value.
In order to see any statistics, you need to connect the Statistics Component to the output of a Runner component. Once you've connected a Runner output to a Statistics component, the graph viewer will immediately show the data being sent from the connected Runner.
Notice that the Statistic component actually shows two overlapping graphs. The left Y-axis is linked to the values coming to the left input terminal, while the right Y-axis is linked to the right terminal in the same fashion. The component settings allow you to specify which values that should be monitored.
Statistics Component
4. Interpreting statistics
Now that you know how to get statistics in loadUI, take a moment to read Essential Statistics to learn which statistics to look at.
