sampler | Dynamic weighted sampling with replacement | Animation library

1. This v1/pages is just a label, don't waste your time by searching for it, sampler labels may be absolutely different:

   if you open .jtl results file you should see the URL of the request and once you figure this out you will be able to make the decision whether to keep it or not.

   One of possible reasons is that particular this request returns large response which doesn't fit into memory, if this is the case and you're not too interested in the response - you can tick "Save response as MD5 hash" instead:

2. There are 2 ways of fixing "Java heap space" error:

   • Reduce heap usage, i.e. see this hint with MD5 sum or consider going for Distributed Testing
   • Increase heap size. For example 2 gigabytes may be not enough, try allocating more heap if you have enough RAM. Also if your pipeline is running on Linux you need to slightly amend your command to look like: HEAP=-Xms512m -Xmx2048m && export HEAP && ./jmeter -n -t test.jmx ......

It's impossible to provide an answer without seeing the screenshot of your Test Plan or even better Schematic View (the option is available under "Tools" main menu entry since JMeter 5.1)

Given you're able to see the extracted value in the debug sampler I can think of 2 possible options:

1. Your syntax of referring the user_id variable is wrong, in JMeter the Variables are accessed like ${user_id}
2. Placement of your JSON Extractor is wrong, i.e. instead of putting it as a child of a specific sampler you have it at the same level as all Samplers therefore it's getting applied to the Debug Sampler as well and the extracted value gets overwritten. See Scoping Rules user manual section for more information

1. Regular Expression Extractor:

Just got the answer from Optuna developers:

A (private) attribute was introduced to the TPESampler in v2.8 and if you've pickled or serialized the sampler before this introduction, you'll encounter this AttributeError when unpickling it with v2.8.

The solution to this problem is re-instantiating the sampler object and substitute it to the study.sampler:

WebRTC (getDisplayMedia) typically records as webm.

I have a sample app running at record.a.video

and in the code (which looks similar to yours, but for the mimetype): https://github.com/dougsillars/recordavideo/blob/main/public/index.js#L652

gl.bindTexture binds the texture to the active texture unit. The active texture unit is a global state and can be changed with gl.activeTexture. Every time gl.activeTexture is called, the active texture unit is changed. This affects all subsequent calls to gl.bindTexture.
The 2nd line in loadTexture is gl.bindTexture(gl.TEXTURE_2D, texture) and binds the texture to the randomly set texture unit.
Use the texture unit 0 (gl.TEXTURE0) in loadTexture to load the texture. After loading the textures, bind them to specific texture units. Alternatively, you can pass a specific texture unit to loadTexture and use it when loading the texture.

You need to simulate real-life activity of each real user, if all of them are doing the same actions - it's sufficient to implement these actions. If different users are doing different actions - it makes sense to move these actions into different Thread Groups

Stress Test assumes finding the limits of your application so I would suggest the following approach:

1. Start with 1 user
2. Gradually increase the load at the same time looking into Response Times Over Time and Transactions per Second charts
3. Up to certain load response time will remain the same and throughput will be increasing at the same factor as the number of users does, when response time will start growing and transactions per second will decrease it will indicate that you reached the saturation point and that would be the maximum of users which your system can support.

Try to avoid using listeners as they don't add any value, just consume resources, you should be running your test in non-GUI mode and when the test finishes either use listeners to open and analyze .jtl results file or generate HTML reporting dashboard

As Justin said you aren't assigning the return value of os.path.join anywhere. This will create a path, but if you aren't doing anything with it, nothing happens.

You have to use the .write() function to write the file to the os.path.join return value.

This code should work.

You should use the reference ws when defining myrange.