I'm looking for a way to display pie chart/table after running 100 tests, but all available built-in reports seem to accumulate data on time spent per sample, controller and about performance metrics.
Although tests mostly check performance and some metrics are usefull, we also need statistics on actual response data.
Each http request queries service for items availability per product.
After tests finish we also would like pie chart appear with 3 sections:
Available
Low on stock
Unavailable
Now, I found "Save Responses to a file" listener but it generates separate files which isn't very good. Also with "View Results Tree" we can specify filename where responses will be dumped.
We don't need the whole response object and preferably not even write anything to disk.
And than, how to actually visualize that data in JMeter after tests complete? Would it be Aggregate Graph?
So to recap: while threads run, each value from json response object (parsed with JPath) should be remembered somewhere and after tests complete these variables should be grouped and displayed as a pie chart.
I can think only of Sample Variables property, if you add the next line to user.properties file:
sample_variables=value1,value2,etc.
next time when you run JMeter test in command-line non-GUI mode the .jtl result file will contain as many extra columns as you have Sample Variables and each cell will contain respective value of the variable for each Sampler.
You will be able to use Excel or equivalent to build your charts. Alternatively you could use Backend Listener and come up with a Grafana dashboard showing what you need.
Related
I was wondering if there was a easier way to do this. Below is a simple load test specification:
WHen I run for high loads the Summary Report might report percentage errors. And you can also probably view those requests in that View Results Tree page. (That is if we catch the error-ed request quickly enough).
Now what do we do if we want to study all the errors to see if there is some pattern in them, or, simply to know all kinds of errors in the http load test? I am looking for some feature or hack to this effect.
You can generate HTML Reporting Dashboard which provides:
A Statistics table providing in one table a summary of all metrics per transaction including 3 configurable percentiles, basically the same as your Summary Report listener
An error table providing a summary of all errors and their proportion in the total requests
A Top 5 Errors by Sampler table providing for every Sampler (excluding Transaction Controller by default) the top 5 Errors
Response codes per second zoomable chart
There is a separate Listener - Response Codes per Second
JMeter .jtl result files are basically .CSV files so you can open it with MS Excel or equivalent and perform grouping or plot errors messages at a timeline chart
And last but not the least, for "high loads" it's recommended to disable or even remove all the Listeners (especially View Results Tree guy) because they don't add any value and just consume the valuable resources.
I've executed a single request for an API in Jmeter. When I am trying to check for the latency details, I get different values of latency in View Result Tree and View Results in Table.
Sample Details in View Results Tree Listener is Load time:23202, Latency:23202
Sample Detail in View Results in Table Listener is Sample Time: 23241, Latency: 0
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What can be the possible reasons for the same?
Is there any way we can get the correct latency details in Jmeter when we hit any request?
The reason for the same is that you're looking into different results of the same.
If you open .jtl results file using text editor of your choice or an application like MS Excel you will see that there is one line for each request
And when you open .jtl results file using "Browse" button in the listener of your choice - the values are the same for each request in any listener
So the situation you're describing is not possible as you're comparing not the same results as they even have different response time.
More information:
JMeter Glossary
How Do I Run JMeter in Non-GUI Mode?
When I run the test in GUI, i see the Average, Min, Max in GUI. But when I run in console, is there a way to add these to the csv file?
These values are being calculated so you will be able to see the values only when you open .jtl results file after test finishes in the listener of your choice, i.e. Aggregate Report or Summary Report.
If you want to see the interim statistics while your test is being executed you have the following choices:
JMeter Summarizer output. JMeter reports some numbers into stdout while your test is being running
You can get some extended information if you run your JMeter test using Taurus tool as a wrapper
Both console and web interface options are available, in order to see current test execution stats in browser start your test like:
bzt yourtest.jmx -report
And finally you can use Backend Listener to send your results into database, message queue or web service and use custom plotting application to print out either raw or parsed statistics, here you are limited only by your fantasy:
More information:
JMeter: Real Time Results
How to Use Grafana to Monitor JMeter Non-GUI Results
JMeter produces some basic fields/result_field. JMeter doesn't create everything you see in different types of Listeners.
You can give this a try.
Create a plan
Generate atleast 100 samples (As large amount of data is required for some listeners), using a single sampler (request)
Use as many Listeners as you want of different types (say 15 types of listeners)
Run the plan....
Now in the filename field of all the listeners give series of names of files like a1.jtl a2.jtl
and so on....
see the screen shot
enter image description here
Now again run the plan. Go to the files and open them in some good editors like notepad++.
For your surprise you will find the same data in all the files irrespective of the type of listener generating the file.
Crux of the matter is : JMeter gathers only handful of information from the run, the rest information which is shown in different Listeners is COMPUTED by the JMeter.
So you can read the *.jtl file into any of the listener.
In JMeter, the new way since 3.0 to have results is to use the Web report generated at end of test:
http://jmeter.apache.org/usermanual/generating-dashboard.html
I am using the View Results in Table and View Results In Tree to view some results of a test.
My thread group has a number of users = 20; Rump up period =1; Loop=1000; This is a request to send the coordinates to server. After running these results differ. In View Results in Table displays error statuses:
But in View Results In Tree the result is successful, without errors:
What does it mean?
Problem with the view "Results in Tree" is that it doesnt show all Samples. It just shows the latest 500 sampels
From the User's Manual...
Starting with version 3.2 the number of entries in the View is restricted to the
value of the property view.results.tree.max_results which defaults to 500 entries. The old behaviour can be restored by setting the property to 0. Beware, that this might consume a lot of memory.
So the last 500 entires from your table should match with the tree. For more information you might wanna check this
You'll have to restart JMeter for it to apply the new setting
As per JMeter Changelog for version 3.2
Starting with JMeter version 3.2 the number of results in View Results Tree is limited by default to 500 entries. If you want more entries, you have to set the property view.results.tree.max_results to a higher value, or to 0, if you don't want to impose any limit. You can set the property in bin/user.properties. More info might be found here.
Add the next line to user.properties file (it lives in JMeter's "bin" folder)
view.results.tree.max_results=0
Restart JMeter to pick the property up
This way you will "tell" View Results Tree listener to show all the samplers (be aware that JMeter can fail to display 20 000 samplers in the View Results Tree listener)
Out of topic, but still important:
As per View Results Tree listener documentation
View Results Tree MUST NOT BE USED during load test as it consumes a lot of resources (memory and CPU). Use it only for either functional testing or during Test Plan debugging and Validation.
As far as I can see, you are running your test in GUI mode. Please don't, JMeter GUI should be used for tests development and debugging only, when it comes to test execution you should run your test in command-line non-GUI mode.
I want to be able to run a JMeter test for thousands of users and plot the results dynamically using a JQuery based charting library like HighCharts i.e. the response from every virtual user must be plotted in near real time to show a stock ticker like chart which gets updated dynamically. I am OK running the test in Non-GUI mode.
I have tried the following,
- Run the JMeter test in non-GUI mode and write the response to a file. What I notice is that the results get written to the file in a buffered manner which means even if I have a program monitoring the file for new records, I wont get it in real time.
I am looking for suggestions on how this can be achieved
1. Do I need to write a custom JMeter plugin? In this case how will it work?
2. Is there some listener which can give me the desired data
3. Can this be done via post processor?
I have seen real time reporting being done on some cloud based load testing websites which use JMeter, so I'm sure it can be done, but how?
There is some buffering when writing to a file, but it shouldn't be more than a few seconds worth of data.
I'd go with the route of reading the log file into something like statsD using something like logstash.net and from there you can probably find an existing solution that pushes it to a chart.
You can disable buffering by adding this in user.properties file:
jmeter.save.saveservice.autoflush=true
This impacts slightly performances for test that have low or no pauses.
To do what you want you could use this kind of library:
http://www.chartjs.org/