How can i distribute networks while load testing in JMeter?
Suppose my load test is of 1 hr. and i have 100 users. I want to distribute network like-
20% users - 2G speed
40% users - 3G speed
rest - 4G speed.
OR, other scenario like throughout the whole test of 1hr. 20% traffic will on 2G speed, 40% traffic on 3G and rest on 4G speed.
Can anyone tell me that how to mimic this network behavior in JMeter?
You will need to kick off 3 JMeter instances in Distributed Mode
For 1st JMeter instance add the next lines to user.properties file to mimic 2G network:
httpclient.socket.http.cps=6400
httpclient.socket.https.cps=6400
For 2nd JMeter instance add the next lines to user.properties file to mimic 3G network
httpclient.socket.http.cps=2688000
httpclient.socket.https.cps=2688000
For 3rd JMeter instance add the next lines to user.properties file to mimic 4G network:
httpclient.socket.http.cps=19200000
httpclient.socket.https.cps=19200000
More information: How to Simulate Different Network Speeds in Your JMeter Load Test
Related
I'm trying to test my https endpoint with JMeter. I want to make at least 10000 requests per second, but when I set the number of threads to 10000 I get way less rps, around 500.
I've tried setting the number of threads to 1000 and 100, surprisingly I get this same number of rps. I'm using HTTP Sampler and "use Keep-Alive" is set to true. When I look in the statistics I see that when using 100 threads, it makes use of Keep-Alive and connect_time is around 100 ms, but when the number of threads is higher connect_time grows, it's like it stops reusing the connections.
I know this isn't a server issue, because I've tried testing that same endpoint with Yandex.Tank and phantom and it can easily maintain 10 000 requests per second, the problem is it can't use response data to make furhter requests, that's why I have to use JMeter for this task.
This can be done by using "Stepping thread group". It will allow you to send 10000 request per second upto specified time. Refer below image.
Stepping Thread Group
Download jar from below link.
https://jmeter-plugins.org/wiki/SteppingThreadGroup/
I hope you are trying to achieve this using one machine. Try with multiple machine or jmeter distributed mode.
https://jmeter.apache.org/usermanual/jmeter_distributed_testing_step_by_step.pdf
https://www.blazemeter.com/blog/how-to-perform-distributed-testing-in-jmeter/
https://blazemeter.com/blog/3-common-issues-when-running-jmeter-scripts-and-how-solve-them/
I am assuming that it is the issue with machine which is not able to generate that much load. Usually, i have use max 300 threads per machine but it depend on the machine config. Just check if the machine is having issue and multiple machine is able to generate more load, considering server is not having any issue.
Hope this helps.
Update:-Usually 200-500 can be handled my modern machines.
Please check the below link to have some more info:-
1.How do threads and number of iterations impact test and what is JMeter’s max. thread limit
2.https://www.blazemeter.com/blog/what%e2%80%99s-the-max-number-of-users-you-can-test-on-jmeter/ .
I want to conduct a HTTP load test.
I've 8 different managed servers(with different ports and same IP), and I want to load balance my requests(5 requests per sec). How should I configure it in JMeter?
In HTTP Request, use a Variable for your port :
${port}
Use a CSV Data Set that will use a CSV file containing 1 row per port:
To have 5 requests per sec, add a Constant Throughput Timer and set its Target Throughput:
Alternatively you might want to use this 3rd party plugin :
https://jmeter-plugins.org/wiki/ThroughputShapingTimer/
Another option, if it's 1 request you can also split it to 8 requests with different servers and put requests under Interleave Controller.
Each request will send to different server.
You can check the Interleave across threads checkbox for supporting threads.
If checked, the interleave controller will alternate among each of its children controllers for each loop iteration but across all threads
For timing use #UBIK LOAD PACK suggestion.
In general I don't think that sending requests to different servers is something that real users will do so most probably you will have (or already have) a load balancer (or several for failover reasons) in front of your system acting as a single entry and exit point.
So well-behaved JMeter test should target the load balancer, not single backend host, this way you will be able to test failover, resilience, load balancing algorithms, etc.
Configure your JMeter test to hit the load balancer instead of individual servers
Make sure you have DNS Cache Manager added to your Test Plan
If needed you can limit JMeter's throughput via Constant Throughput Timer
I am new to JMeter and I have been tasked to do a POC where I need to load test the webserivce. I learnt the basics like adding the test plan, adding threads, adding SOAP/RPC Requestsampler and I got the response as well. But, I am not sure how to achieve the below scenario using JMeter.
I need 600 users to hit the service per request/second (this should run for 10 minutes) and the 2nd scenario is about 2000 users to hit the service at 5 request/second (again this should run for 10 minutes)
Also, would it be possible for JMeter to handle this many number of threads/users?
Any inputs would be deeply appreciated.
Given you properly configure JMeter it shouldn't be a problem to simulate 2k users, actually you may need more as if your web service response time will exceed 1 second - you won't be able to achieve 2k requests per second.
Configuring JMeter:
Run test in non-GUI mode
Disable all Listeners (if any)
Increase JVM Heap size
See 9 Easy Solutions for a JMeter Load Test “Out of Memory” Failure for detailed explanation and instructions
Simulating 600 / 2000 requests per second.
Set "Loop Count" to Forever or -1 in Thread Group
Tick "Scheduler" box and set desired duration (600 seconds)
Add Constant Throughput Timer and specify the desired throughput in requests per minute
It is recommended to use HTTP Request sampler for web services testing, you can set Content-Type and SOAPAction headers using HTTP Header Manager
i am new to Load testing and would like configure my jmeter setting for the following requirement below. My understanding is Theard are different from request per second. If so what will be values in thread group for the below requirement.
"Initial load 20 request/second, increase load with 100 request/second for each minute.
Perform load test until we see an increase in latency "
You should put something very high into Thread Group and use one of the following approaches to define your load pattern:
Constant Throughput Timer - it comes bundled with JMeter
Throughput Shaping Timer or Concurrency Thread Group- available via JMeter Plugins project
In order to automatically stop the test when latency exceeds threshold you can use AutoStop Listener, again it comes with JMeter Plugins.
In general latency is networking related metric so even if your application is slow as a snail you can have low or even zero latency so I would recommend considering response time and/or transactions per second metrics as well.
I am new to jmeter and scripted for login authentication. Project requirement is to see the load for 10K concurrent users.
Script is working fine but to enhance I need suggestions on how to do the following thigs:
How can I see that how much time/average time the server takes to load a page.
which thread grp (studied Ultimate thread group but it is not very clear to me), should be used to see the maximum load the server can sustain in a particular time, for that rampup time need to be adjusted (correct me if I am wrong).
Please tell how to adjust the rampup time with respect to users/waiting time etc., in short how to do incremental/proportional observation to see the server performance(there is no Gateway error etc)
If you're looking for your server capacity boundaries I would rather stick to "requests per second" rather than to "concurrent users" as users may work with different applications in a different way.
For instance, if it is image gallery - the majority of users will be browsing images and do this rather frequently, for instance request next image i.e. each 2 seconds. Given image load time 1 second it will be an image per 3 seconds - 20 images per minute. In this case 10000 users will create the load of 3333 requests per second.
If your site is articles collection, users will need some more time to read an article, i.e. 2 minutes. In that case 10000 users will create 83 requests per second load.
JMeter provides Constant Throughput Timer out of the box, you can set desired target throughput in requests per minute using it. And once you're already aware of JMeter Plugins project, it offers Throughput Shaping Timer - more advanced test element with extended functionality.
If you go "throughput" way, no matter which Thread Group you choose as the load will be orchestrated by aforementioned timers.
See What is the Relationship Between Users and Hits Per Second? article for more detailed explanation.
Once you design your test scenario run it in non-GUI mode (as JMeter's GUI is very resource intensive) as:
jmeter -n -t /path/to/your/testplan.jmx -l /path/to/resultsfile.jtl.
When the test finishes, open JMeter GUI, add Aggregate Report listener and inspect min/max/average response times per requests.