I am trying to configure a test for signup-login with invalid credentials imitating bruttforce attack. However, I want to make requests as a single user.
So the scenario is the next:
Request to sign up with valid params;
Attempt to log in with invalid params in a loop.
I am adding throughput timer but then I need to set up a high number of threads to generate for example 1 request per second.
How can I set exactly one user and run only one request per second in a loop?
UPDATE - SOLUTION
Everything was rather simple but still strange for me.
Maybe someone will face the same problem.
To get a number of requests per one user throughput timer should be placed not inside the controller but inside the thread itself.
To achieve Target Request Per Second use Throughout Shaping Timer : How to use Throughput Shaping Timer
JMeter Plugin link : Download from here
Few Important Notes:
JMeter threads of Thread Groups in scope of the Element will be
stopped when RPS schedule finishes.
Provide enough working threads for your RPS, JMeter timers can only delay threads (and limit RPS). You may pair this plugin with Concurrency Thread Group using Schedule Feedback Function to dynamically maintain thread count required to achieve target RPS.
If you're using versions of JMeter lower than 3.3 and if you have RPS that lower at the end of test, make threads to lower also. Оtherwise you'll have a spike in last second.
Avoid using zero RPS value as start of test, this produce spike also
Avoid zero RPS during the test, this may lead to nasty effects
Now, practical example showing 1 RPS for 1 User:
You might want to reconsider the location of the timer, it obeys JMeter Scoping Rules so it gets applied to all Samplers which are in your Thread Group.
If you want to apply it to only one - make it a child of the relevant sampler.
Also be aware that Constant Throughput Timer is precise enough on minute level so you might want to switch to the Precise Throughput Timer
Related
In my application I want hit 20000 request in 10 hrs but I want distribute load in different time with different number of request means ex in 1 hrs 2000 request second hrs 3000 request third 1000 request like that how achieve this means how to separate load in diff time with diff no. of request
The easiest option is going for Throughput Shaping Timer, configuration implementing your described setup:
It's a good idea to use Concurrency Thread Group in combination with the Throughput Shaping Timer, they can be connected via Feedback Function so JMeter would be able to start extra threads if the current amount is not sufficient in order to reach/maintain the desired number of requests per second.
Both are JMeter Plugins and can be installed using JMeter Plugins Manager
Another solution could be using Constant Throughput Timer.
N.B. although the Timer is called the Constant Throughput timer, the throughput value does not need to be constant. It can be defined in terms of a variable or function call, and the value can be changed during a test. The value can be changed in various ways:
You could set the throughput using a property or variable.
Calculate the throughput values you need at different time intervals and set the property when the time is reached.
props.put("currentTPM", 120)
You will have some work in checking the duration since the test is started.
You may create a separate thread group to control the throughput. Rename the thread group name to TG-TM. Set the number of threads to 1 and loop count to infinite. Set the duration of the thread group.
def lstThrouputInOneHour= [2000,3000,1000,5000,4000,5000]
def currentIndex=vars.get("__jm__TG-TM__idx").toInteger()
if (currentIndex <lstThrouputInOneHour.size() ) {
def currentTPH=lstThrouputInOneHour[currentIndex]
def currentTPM=currentTPH.intdiv(60)
props.put("currentTPM",currentTPM.toString())
Thread.sleep(60*60*1000)
}
Note: Please introduce a startup delay to other thread groups to ensure they have access to the throughput value when they start.
This solution can be extended to work with Bean Shell Server where you could change the throughput values (JMeter properties) remotely
I am trying to load test an API and I am trying to make sure I fire only 2 requests in a second due to the throttling limit set at the API Gateway level so if the third request is sent within a second (this happens if the response time of the earlier request is < 1 sec) then I get HTTP-429 error saying 'too many requests'. Please could someone suggest if I can use any timer to achieve this?
Thanks,
N
Constant Throughput Timer is the easiest of built-in test elements, 2 requests per second is 120 requests per minute. However it is precise enough only on "minute" level so you might need to play with ramp-up period
Precise Throughput Timer is more "precise" but a little bit harder to use as you need to provide controlled throughput and test duration
If you don't mind using JMeter Plugins there is Throughput Shaping Timer which provides the maximum flexibility and visual way of defining the load
For this particular case, I suggest the Arrivals Tread Group. This TG will let you exactly configure the desired TPS (Arrival Rate), plus the plugin will instantiate the necessary threads to generate the load. No need to guess how many threads/vusers you'll need.
I don't know if I have placed the timer at the correct location. I am not able to get Precise Throughput Timer working.
Any JMeter component needs to be placed according to JMeter Scoping Rules
How do you expect the timer to "work" given you have only one thread and one iteration in the Thread Group especially given your test finishes in 500 milliseconds and you configured the test duration as 500 seconds
If you want to limit your test throughput to 1 request per second for 1 thread and 1 iteration only - I can only think of introducing pacing as none of the existing timers won't be able to do this given that short test duration
I am quite new to jmeter and try to do a performance test of my application. I want to generate 100 request per second scenario however my server takes 3-4 secs to respond to every request. I am running my test for 1 mins which means number of requests fired should be 60k within the time span. However jmeter actually waits for the response before it sends next request. Which is not what I am looking for.
How can I make sure that jmeter sends a new requests every second with 100 req/sec without waiting for the response so that the number of requests fired per min is 60k.
I am trying to use constant throughput timer with 60k as request per min, however that is not helping. Here is my test screenshot.
EDIT
I have done like this
And Throughput shaping timer being as
So ideally I should get number of samples as 3000?, still not getting that.
Make sure you provide enough threads (virtual users) under Thread Group, "vanilla" JMeter won't kick off any extra threads if actual throughput is less than target one you specify in the Constant Throughput Timer.
Another solution would be using Concurrency Thread Group along with the Throughput Shaping Timer. They can be tied together via feedback loop so if you use these test elements JMeter will start more threads if the current amount won't be enough to reach the desired requests per second rate.
You can install both using JMeter Plugins Manager
My suggestion is to consider using the Arrivals Thread Group. This TG will allow you to configure the desire average throughput (ATP); the TG will instantiate the required threads needed to achieve the ATP goal.
I've got a pretty basic test plan in JMeter consisting of a Thread Group and a bunch of HTTP Requests separated by Timers and a Summary Report. I notice when I watch the report that all 10 of my threads make the first request, then pause for some time, then all make the second request.
Is it possible to have each thread execute the full script independently of the others so that (given a Ramp-up delay) you have overlapping workload, i.e. some threads executing the first step while others are on the 3rd or 4th etc?
Threads DO execute independently in JMeter.
Make sure you are you using any Ramp-up period in the thread group definition.
Another reason for what you're seeing is probably due to using a constant timer which ends up in requests looking they they are synchronized. If you simply change it to one of the Random timers you'll get more randomness in the delay between requests.
Here are two good sources about timers:
http://performancetestersdiary.wordpress.com/2013/03/06/jmeter-timers-in-pictures/
http://www.softwaretestingclass.com/timers-in-jmeter-tutorial-series-6/
Yes, Threads DO execute independently in JMeter, but,if you start at the same time and do the same things, all the requests will be issued at the same time (specially if you are using a constant throughput timer).
I use two way of approaching this problem:
use a uniform random timer under a "once Only controller", at the beginning of the thread.
The value of the timer should be close equal or close to the time it takes to execute the service.
use rampup time (same value as above). It is deterministic and simpler to use (which can be bad or good, according to your needs.
Click on your "Test Plan"
Check/Select the Property: Run Threads consecutively (i.e. Run Groups one at a time)
Hope this will help.