I need to perform tests on hundreds of HTTP links one after the other.
That means i want to, for instance, perform a 3 minute test with 5 users on 1 link and after that's done, do the same for the next link.
1 way to do this is to create a ThreadGroups for each link, each having a HTTPsampler and just have all of the run consecutively. But i read that that would create memory problems for the testing machine.
So what is the correct way of doing this? I really don't feel like creating and manualy running a separate TestPlan for every link.
You can use only one HTTP Request sampler, the suggested Test Plan structure:
Thread Group with the number of threads (virtual users) you want to simulate
CSV Data Set Config containing the list of URLs
Runtime Controller configured to last 180 seconds
HTTP Request sampler configured to hit the URL:
This way you will hit 1st URL for 180 seconds then 2nd URL for 180 seconds, etc.
For the problem you have mentioned you can create single test plan instead of multiple test plans and add multiple thread groups inside it and make sure that run thread consecutively is checked.
In each thread group mention the thread count and test duration as mentioned in the example below.
Related
I have a single thread group which has 3 requests and have set the Number of Threads(users) = 2.
I would like all the requests to be executed in sequential order for each user before it repeats these steps for the next user and so on.
Output expected:
HTTP Request 1_Thread 1
HTTP Request 2_Thread 1
HTTP Request 3_Thread 1
HTTP Request 1_Thread 2
HTTP Request 2_Thread 2
HTTP Request 3_Thread 2
However, the output results vary differently for each run and are not in the order I expect. How can this be corrected?
I have tried following but with no luck in achieving my output
1. Enable/disable "Run Thread Groups consecutively
2. Running the test in non-GUI mode
I have attached a screenshot as an image as I am not able to embed into this message yet.
Appreciate if anyone can help me with this query
Thanks
Output Screenshot
For execution of Sampler Request by only Single Thread at a time use Critical Section Controller.
For more info about Critical Section Controller Critical Section Controller
The Critical Section Controller ensures that its children elements (samplers/controllers, etc.) will be executed by only one thread as a named lock will be taken before executing children of controller.
Critical Section Controller takes locks only within one JVM, so if using Distributed testing ensure your use case does not rely on all threads of all JVMs blocking.
Practical Example:
Place all your request under Critical Section Controller
Run the test for any number of Threads you want
Observe the Result in View Results Tree
Note : If you want to run it sequentially from 1 thread to N, make sure you provide Ramp Up Period properly.
I'm a newcomer to Jmeter and want to be able to run some setup requests once only, in which some variables are setup, before I then run a set of further requests for as many users as I set in the Number of Users Thread Group. These users are passed the variables created in the Once Only Controller.
I've inherited a script as follows, using a Once Only Controller:
If I set the Number of Threads as 10 to ramp up to 10 in one second and run for one minute, I expect the number of Samples (requests) made in the Once Only Controller to show as 1. I only want these requests to run once then subsequent requests to use the setup data.
Why then, when I run, do I see the samples as 10 in the requests that are set in the Once Only Controller:
Bear in mind there may be some fundamental misunderstandings given my I'm a newcomer to Jmeter.
I found the setUp Thread Group Controller which seems to be what I need. However, this does not seem to pass variables extracted using the JSON extractor into the next Thread Group 'Load Test'
Thanks
Use Once Only Controller for running specific samplers for every thread
The Once Only Logic Controller tells JMeter to process the controller(s) inside it only once per Thread
You can add samplers to setUp Thread Group so it'll be executed once before test
execute before the test proceeds to the executing of regular Thread Groups.
Note keep its default (especially Number of Threads = 1)
As per Once Only Controller documentation:
The Once Only Logic Controller tells JMeter to process the controller(s) inside it only once per Thread, and pass over any requests under it during further iterations through the test plan.
So each your Thread will execute Once Only Controller's children only once, no matter how many loops your thread group will have.
As you have 10 threads each of 10 threads will execute the requests once.
If you want to execute the request by only one thread, no matter how many requests are in the Thread Group - I would recommend going for If Controller instead
Substitute Once Only Controller with an If Controller
Use the following condition:
${__groovy(ctx.getThreadNum() == 0 && vars.getIteration() == 1,)}
i have the need to run one http request sample more times than the rest of the samples in the Test group, for example, i need to run for 10 users, but for each of them, i need to run one of the samples multiple times, lets say 10, is there a way to achieve it?
1) I set "Number of Threads (Users)" in Thread group to 10, so i have 10 total users (with data taken for every thread from a CVS file, with equal number of rows and threads, so 1 thread is an unique data set.
2) I make some requests after, but for only one of the requests, i need to make it like 100 times in parallel for the same data for every thread, so in total, i will make 1000 (100 http requests for 10 unique users/threads) requests to that endpoint
Thanks in advance!
Edit: I found the loop controller, but its not making the 100 http requests at the same time for each thread in the thread group, it makes another one when the first ends
If I correctly got your requirements, to wit:
You need to execute one sampler more times than other samplers
The execution must occur at exactly the same moment
The most obvious choice would be either Parallel Sampler or Parallel Controller (depending on the nature of your requests). You can install both test elements using JMeter Plugins Manager:
I have a requirement in JMeter, while executing several recorded HTTP Request (placed inside Transaction Controller) in Thread Group, They should start its execution from one by one ie) Controller 1, Controller 2, ... & Final Controller.
But when I gave 100 threads it start execute, Controller 1 for 100 times then Controller 2 for 100 times and it continues the same till last controller.
From the above shown image you can verify my results. And I need to know, how can I prioritize my controllers when I gave multiple thread counts. My exact output for 100 threads should be like as mentioned below,
1. Controller 1, 2, and till final controller should run as 1st thread count
2. Controller 1, 2, and till final controller should run as 2nd thread count
3. Same like it should continue till the 100th thread count
Please let me know how this requirement is possible in JMeter 4.0
Thanks in advance
This is default JMeter behaviour, JMeter threads (virtual users) are absolutely independent so:
When you start your test with 1 user it starts executing Samplers upside down, one by one
When you start your test with 100 users - all 100 users start executing samplers upside down. And given you have 100 concurrent users it might be the case that first sampler is being executed by multiple users at once.
Normally this is what the majority of people require. If you got the requirement to run all requests by 1st user followed by all request by 2nd user and having 100 users in parallel - suggest the person, who gave you this requirement to quit IT and become a lawnmower as the requirement doesn't make sense and is contradictory.
You can still achieve it using Concurrency Thread Group configured like:
Which will give you what you're looking for:
You can install Concurrency Thread Group using JMeter Plugins Manager.
I am trying to run http samplers sequentially for multiple requests. Where the output of 1 API response is the input of next API request. My concern is when I run with 5 users (for. e.g), then at given point of time it first executes 1st API with 5 users then second API with 5 users, in this process the API where input is required gets lost. Please help me on this. I need a solution, where all the samplers are first executed for first user, then for second thread all the samplers are executed and so on.
Dzizu is correct, threads are independent so you are going to run into problems with this approach.
Since you are using 5 users across the test, it would be better to have one thread group with 5 users, and then have Simple controllers (or Transaction controllers) that hold the HTTP samplers and whatever else you are using. This will ensure that the samplers are executed concurrently, but they can still share data if required.
Simple example below:
Threads usually are independent. The easiest way in my opinion is to put full process in one thread and then multiply threads in thread groups.
Eventually I tried to solve this by using loop count option. For example if I want to simulate 5 users in 1 second, I set values as loop count=5,threads=1,ramp-up=.2.
This worked for me so give it a try.
Use the Transaction Controller or Simple Controller to group your samplers together and run them in sequence without worrying about the number of threads. For me, it is working as expected :).