can somebody please advise how to create a jmeter thread properties correctly with the following requirements
55 user a min ramp-up over an hour with a test running for 4 hours.
If you need 55 users added each minute during 1 hour, you set up should look like:
Number of Threads: 3300 (55 users x 60 minutes)
Ramp-up: 3600 (1 hour == 3600 seconds)
Loop Count: Forever
Scheduler -> Duration: 14400 (3600 seconds in hour x 4)
Be aware that 3300 concurrent threads is quite a high load, make sure that you're following recommendations from JMeter Performance and Tuning Tips guide.
If you won't be able to create such a load from a single machine consider Distributed Testing when one JMeter master machine orchestrates several slaves, for instance 3 slaves having 1100 virtual users each.
So you think about something like this setup I show on the screenshot below, isn't ot? It is set on jp#gc - Stepping Thread Group that comes with jmeter plugins in standard set. You have there 55 users tat will ramp up to that value through 3600 seconds and will hold that load for next 3 hours (10800 sec).
Related
I am doing load test on my system using Jmeter. the requirement is I need to generate 150 requests per minute for a duration of 20 minutes constantly.
I tried with below approaches
I tried by giving this configuration.
No of threads - 3000 [150 req/min * 20 mins]
rampup period - 1200sec [20mins * 60]
But here test stopped after creation of 2004 thread. by giving
this error
Failed to start the native thread for java.lang.Thread “Thread Group 1-2004”
Uncaught Exception java.lang.OutOfMemoryError: unable to create native thread: possibly out of memory or process/resource limits reached in thread Thread[#51,StandardJMeterEngine,6,main]. See log file for details
Used concurrency thread group with below details
Target concurrency - 150
ramp up time - 1 min
hold target rate time - 20 mins
but here no of samples collected are more than 3000 [150 req *20 sec] which i feel is not correct
Is it possible to create exact load according to my requirement in Jmeter(150 req/min ->duration of 20 mins) or should I explore other tools like locust??
tried with precision timers (attaching screen shots)
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Your understanding of relationship between users and hits per second is not correct.
When JMeter thread (virtual user) is started it begins executing Samplers as fast as it can. The throughput (number of requests per second) mainly depends on the response time.
For example:
you have 1 user and 1 second response time - the load will be 1 request per second
you have 1 user and 2 seconds response time - the load will be 0.5 requests per second
you have 2 users and 2 seconds response time - the load will be 1 requests per second
you have 4 users and 2 seconds response time - the load will be 2 requests per second
etc.
If you want to slow down JMeter to the desired number of requests per minute it can be done using Timers.
For example:
Constant Throughput Timer:
Precise Throughput Timer:
Throughput Shaping Timer
I have the following scenario:
every 1/2 hour a user send a file to the server
every 5 seconds a user pings the server
do it for 4000 users during 24 hours
my question is, can i do the following and achieve the same results?
every 15 minutes a user send a file to the server
every 2.5 seconds a user pings the server
do it for 2000 users during 24 hours
thanks.
Add Thread Group to your Test Plan and configure it to have 4000 virtual users, loop forever and run for 84600 seconds (24 hours * 60 minutes per hour * 60 seconds per minute)
Add a HTTP Request to ping the server
Add Constant Throughput Timer as a child of the HTTP Request sampler and configure it to fire 12 times per minute (60 seconds in minute / 5 seconds)
Amend Calculalte throughput based on dropdown value according to your test scenario (whether each user or any user should ping the server each 5 seconds)
Apply the similar configuration for remaining use cases.
I'm using a Stepping thread group for a load test
This is the configuration of stepping thread group.
Instead of running for 4 hours, it is stopping after it is run for 17 minutes. What could be the reason?
You can add Runtime Controller as a parent of your test to enforce running time, in your case Runtime in Seconds = 14400 (4 Hours 60*60*4)
You can change the config for the "Stepping thread group" under "threads every" and set the time limit to small value (20 sec) and "Using ramp-up" as total rampup time required(300 sec)
My scenario is I'm running 50 threads for 15 mins and the running 100 threads for 15 mins. The total time of the of the test is 21 mins.
The 50 threads will start running after 10 seconds, slowly ramping up, for 5 mins 50 threads will run simultaneously and then after 5 mins 100 threads with start running slowly with ramping up and run for 15 mins.
After 100 threads finish the 50 threads will continue there running.
The image below will show you the jp#gc thread group
The image will show you the jp#gc ultimate thread group
I only want the responses (maily in graph format ) drilled down to only when 100 users are present, I dont want aggregate of all the soak test.How can this be done? I have also tried loading the jtl.gz file on https://loadosophia.org , it also gives the aggregate reportwhich i dont want.
I only want the specific report of the spike added of 100 users for 15 mins
Please let me know.
Thanks in advance
You can grep your file to only select the interval of time you want and use it to generate file.
Another option is to use this method:
http://www.ubik-ingenierie.com/blog/automatically-generating-nice-graphs-at-end-of-your-load-test-with-apache-jmeter-and-jmeter-plugins/
With this plugin:
http://jmeter-plugins.org/wiki/GraphsGeneratorListener/
And use the fields :
Start Offset
End Offset
If I run distributed testing in GUI mode with 4 client servers(1 Master + 3 Slave) and set the following values in my Plan -
Number of Threads = 12000
Ramp Up time = 1000
Loop count = 1
After completion of Test I get 36000 Samples (which is ok as 12000 * 3 = 36000) but my question is for ramp up time - will it be 3000 for 36000 users??
or will it remain 1000 for 36000
Thanks in Advance
It will be 1000, the same for all client.
Note such a load test profile seems strange as running only 1 request is not what happens with usual usage, what are you trying to simulate ?