JMeter View Results in table

Question

I am running some tests on a rest client. When I started Jmeter, I also setup some listeners such as "View Results in a table". When I run a test. I dynamically see the table being populated.

On the bottom of the table, there is a small toolbar having elements such as

No. of samples, Latest sample, Average and Deviation. What are these elements indicating? No. of samples - Does it mean the total requests that have got the response? Latest sample - Does it mean the latest request being sent? Average - Average of what? Deviation - No clue

JMeter "View Results in Table" Bottom Pane

Answer 1

View Results Table uses lot of memory. Please check JMeter best practices for the actual load test.

To understand about the metrics, add Summary Report to your test plan. (Right click on Thread Group > Add > Listener > Summary Report).

Here is the sample Summary Report.

Here is the View Results in Table for the same execution.

In this example,

Latest sample : last sampler's Sample Time (ms).

Average : a set of numerical values (in this context it is sample time), calculated by adding them together and dividing by the number of terms in the set.

Deviation : standard deviation of Sample Time (ms). JMeter uses STDEVP function.

No of Samples : Total number of requests/samplers triggered in the test plan. If you checked, Child Samples, then it will list only sub-samples instead of the main samples.

Here is the Excel sheet view of the results.

Answer 2

1. Don't use any listeners while your test is running
2. Don't run your test in GUI mode, make sure you are running the test in command-line non-GUI mode

In regards to your questions:

• Latest sample - basically latest sampler Elapsed Time
• Average - arithmetic mean of response times for all samplers (sum of all samplers response time divided by their count)
• Deviation - standard deviation for all samplers

Check out JMeter Glossary for detailed explanation on the above and others metrics.