I am trying to perform load testing for my Web Application. Have created a Test plan with 16 scenarios using a single thread group. I have added multiple sampler requests under each scenario and used throughput controllers for each of these.
But when the test is run, I noticed that the scenarios are running sequentially whereas i Want the scenarios to run in parallel.
Can someone help me with this please.
This is how JMeter works. Each thread (virtual user) starts executing Samplers upside down (or according to Logic Controllers)
When you add more threads (virtual users) there will be some concurrency, as it evidenced by __threadNum() and __time() functions output:
So just provide enough threads (virtual users) and loops (iterations) on Thread Group level and you will get the concurrency you're looking for
Related
I'm testing a web application that only allow 5 active sessions. I want to simulate 100 concurrent REST API calls. But the below script doesn't work.
Jmeter script
Is it possible to simulate Once Only login but 100 concurrent users with JMeter?
You don't seem to be understanding what does Once Only Controller do.
It runs its child(ren) during only first iteration of the Thread Group, it doesn't execute them at the same time.
If you want to run 100 requests at the same moment - take a look at Synchronizing Timer
If in your setup 5 requests are successful and other 95 are failing you could consider logging in somewhere in setUp Thread Group and then pass the JMeter Variables holding the authentication context to the main Thread Group so all 100 threads would share the same login details.
We're getting negative thread count in JMeter for active threads.
The test plan contains various Http Web Test Plan related components and samplers using Parallel Controller. This is creating problems for us in getting correct metrics as JMeter is emitting the same -ve values to the listeners for active threads. Any insights what might be wrong and how to fix this?
Here's the screenshot from the test plan while executing -
First of all don't run JMeter in GUI mode, it's only for tests development and/or debugging, when it comes to test execution you should run JMeter in command-line non-GUI mode
I don't think you should have Parallel Controller as the first parent sampler, the most obvious use case is simulating AJAX requests, concurrency should be set on Thread Group level
I am using JMeter in Non-GUI environment.
I am increasing load now, e.g. 1...5000, but I want to decrease load gradually, e.g. 5000...1
Is it possible?
I can't use GUI env.
The easiest way is going for Custom Thread Groups plugins, for example:
Ultimate Thread Group
Stepping Thread Group
You can install these Thread Groups as a part of Custom Thread Groups bundle using JMeter Plugins Manager
Alternatively you can also use Timers to introduce ramp-down logic, however it will be mostly dependent on your application response time
More information on above approaches: How to Ramp Down in JMeter
Using jmeter, I have 10000 users need to hit the server and to respond back with in 40 sec.
During execution (in distributed mode) only 600 users really hitting (Checked in db) in server.
But in AGGREGATE REPORT it shows all requests hits the server.
What is the issue behind this? why the number of requests hits the server isn't consistent between db and jmeter listener?
Probably your test configuration is a little bit wrong.
JMeter acts as follows:
JMeter starts all the threads (virtual users) within the bounds of ramp-up period specified in the Thread Group configuration
Each thread (virtual user) starts executing samplers upside down
When there are no more samplers to execute and no more loops to iterate the thread is being shut down.
You can check how many threads were actually active using Active Threads Over Time Listener or the same chart of the HTML Reporting Dashboard
So you may run into a situation when some samplers have already done their work and some haven't been yet started. Basically you need to provide enough loops to make sure all 10k threads will be up and running for the required test duration.
See JMeter Test Results: Why the Actual Users Number is Lower than Expected guide for more information.
i have one thread group in jmeter and in it i create several http request sampler and when i run this thread group,i found that seems all these http request executed one by one from "view rults tree". So i what to know how can all these http request run concurrently?
My thread group and test plan only need to be executed once one minute,and i use a bat file to run ,command is :
call C:\apachejmeter\bin\jmeter.bat -n -t C:\apachejmeter\app1.jmx -l d:\restmon\restmon.jtl
your prompt reply would be deeply appreciated!!!!!
This is how JMeter works:
JMeter creates threads defined in Thread Group
Threads start executing samplers upside down (default) or according to logic controllers
When there are no samplers to execute and no loops to iterate thread is being shut down
There are several ways to control concurrency:
Playing with ramp-up and run time
Using Synchronizing Timer which is capable of pausing threads until required number is reached and releases them at the same moment of time
Switching to Ultimate Thread Group which provides some extra options to control the load scenario.
I think that Synchronizing Timer is what you're looking for.