I have a requirement to create simple Burst test in Jmeter:
10 requests-> 20 requests -> 30 requests
On single worker mode.
Throughput 20ms
Anticipated response time : <=200ms
How can we achieve this with Jmeter without using parallel threads?
I am looking for a simple solution.
Thanks a lot
Add plugin
Ultimate Thread Group to JMeter
Add Ultimate Thread Group component with settings of 3 rows
Set Start Threads Count 10,20 and 30
Use different start times so requests batch will be executed in different times
"Ultimate" means there will be no need in further Thread Group plugins. The features that everyone needed in JMeter and they finally available:
infinite number of schedule record
separate ramp-up time, shutdown time, flight time for each schedule record
and, of course, trustworthy load preview graph
Consider using Throughput Shaping Timer and Concurrency Thread Group combination which provides flexible way of defining load patterns:
They can be connected together using Feedback Function so JMeter will be able to kick off more threads in order to reach the desired throughput (number of requests per second) if current amount is not enough.
Both can be installed using JMeter Plugins Manager:
Related
I have the following
but when I run this with 60 threads I don't see the threads being fired off every second. Instead it seems like the requests in the transaction controller are fired off at a rate of 60 requests per min.
Is there a way I can have JMeter create threads at the rate of 60 per minute without a limit on requests?
You need to use Rampup duration in that case. Again that is one time activity, once threads are created they will execute the request and will die / repeat if you need.
Ultimate Threadgroup plugin is also helpful here.
Generally everybody is interested how much throughput(req per unit time) can server take. So in your case its doing correct job i.e. sending requests 60 per sec.
In practice creating multiple threads per sec is bad practice and IMO such testing is not useful (Why it is required?) because client threads in JMeter is not important but requests sent to server by threads (can be 1-10 or 100) many times and how server responds is important.
If your use case is different then share it in detail and we'll discuss. Hope this helps.
If you want JMeter to kick off one thread per second you need to specify Ramp-Up Period equal to the number of threads (virtual users) under Thread Group, if you want 60 virtual users - go for 60 seconds ramp-up.
Also make sure you allow your Thread Group to loop forever as if you don't - you will run into a situation when some threads have already done their job and some haven't been started yet.
Example configuration:
Example output:
More information: JMeter Ramp-Up - The Ultimate Guide
I would like to make Recovery testing to server, I can simulate connection pool full with high load and thus failed in timeout to get connection.
I need to start my test with high load, reach a failure and decrease load gradually,
JMeter can't change it dynamically so I search for plugins and Concurrency Thread Group is doing the opposite,
Increase it gradually, is there a way to make it decrease the value?
Is my only option is to start a new execution with decreased load?
Recovery testing is done in order to check how fast and better the application can recover after it has gone through any type of crash or hardware failure etc.
It can be done using vanilla JMeter without any plugins, JMeter acts as follows:
All threads defined in the Thread Group are started within specified ramp-up period (here you can gradually increase the load)
All threads start executing samplers upside down (or according to the Logic Controllers)
When thread doesn't have any samplers to execute and/or loops to iterate - it's being shut down.
So given you gradually start your requests and thread group is not configured to run forever - the ramp-down should be pretty much the same as ramp-up. You can "help" JMeter a little bit using Gaussian Random Timer, check out How to Ramp Down in JMeter guide for more details.
I found a jmeter plugin jp#gc - Ultimate Thread Group which I can start with high load by adding first row with high thread count and then decrease thread count by adding second (or more) row .
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 would like to execute a loop of HTTP requests with an incrementally number of users.
For example, I want something like that :
1st loop : 1 user
2nd loop : 2 users
3rd loop : 3 users
...
Is that possible with the JMeter GUI ?
Thanks in advance !
You can achieve this effect by using the Stepping thread group plugin
You can gradually increase the number of concurrent users in JMeter. But not in the way you are actually asking ie, every loop / iteration!
Simply - You can not change the thread count within the test once the JMeter test has started running . But you can use variables for the user count and supply to the test before the test starts.
To gradually increase the user count, you can use any of the below thread groups
You can use the regular thread group, ramp-up period. 100 users and 1000 seconds ramp up period, will add 1 user every 10 seconds.
Stepping Thread Group
Ultimate Thread Group
Actually JMeter doesn't allow this, however you can work it around using different approach, for instance if you stick to Requests Per Minute rather than to Virtual Users.
You can use Constant Throughput Timer to set desired initial throughput (i.e. N requests per minute) and increment it by desired factor each Thread Group iteration.
Despite word "Constant" in its name the throughput doesn't have to be constant, it can be a JMeter Variable or Function or JMeter Property.
Reference material:
How to use JMeter's Throughput Constant Timer
Beanshell Server
Throughput Shaping Timer - an advanced version available via JMeter Plugins, has some extra scheduling capabilities.
I have made some PHP scripts and I want to test the response time for simultaneous users in JMeter. This scripts are run in a very short time (50 miliseconds).
What I would like to do is to simulate a load test from 1 to 50 of users where each user (thread) repeats the request for an unlimited period. So first we will have 1 user, after 2 simultaneous users, after 3 ... and so on.
I am trying to do it but with I have is response times where it is evident that there is no simultaneous request.
With HP loaddrunner we can define number of iterations for each thread, is this possible in JMeter?
You can possibly use these 2 thread group implementations
Stepping Thread Group
Ultimate Thread Group
from Jmeter Plugins package, that let you set load-increase for you scenario as you want.
As well you can also look onto Synchronizing Timer if you want "better" concurrency - but this is rather stress-testcase than load one.