I have a JMeter test executing a series of actions that I'd like to pause between.
It's currently set up like this:
Thread Group
+---Transaction controller
+---Sampler executing request
+---Test Action
+---Uniform Random Timer
+---Sampler executing request
+---Test Action
+---Uniform Random Timer
(etc.)
The test actions don't seem to cause any pauses. I have the test actions themselves set to pause the current thread for 0 milliseconds, and the timers to 60 seconds constant pause + up to 30 seconds random pause.
The actual result of running this is that it hops directly from sampler to sampler without pausing at all. What am I missing?
(ETA: This is JMeter 2.13, if that matters.)
Can you confirm that you use time in milliseconds in the Uniform Random Timers, to wit:
Random Delay Maximum: 30000
Constant Delay Offset: 60000
As if you have 30 and 60 correspondingly - the delay happens, but you are not detect it visually. Check "Sampler Start" times in View Results Tree listener to see start times.
Can you double check Transaction Controller configuration? By default timers, pre and post-processors execution time is not being included into report so the delay might happen but you just don't see it. You can include timers duration by checking "Include duration of timer and pre-post processors in generated sample" box
And finally you can also remove Test Action samplers as they're not required. If you put timers as children of "Sampler execute request" the timers will be executed before the requests. See A Comprehensive Guide to Using JMeter Timers guide for more detailed information on timers use cases.
Related
I have a JMeter (5.3) While Controller in a 1-user Thread Group, it reads a CSV and makes http calls for each row. I want all of these to complete as fast as possible (i.e. the loop completes uninterrupted), then the thread-group should pause, then I want the csv-loop to repeat*.
This is proving oddly difficult. Adding a Constant Timer below the While and it's (counter-intuitively) executed before the loop, yet I need it run immediately at start-up then subsequently delay. Similar SO posts advised a Flow Control Action, however the Pause doesn't actually pause for me.
Others suggest adding a Constant Timer child to Flow Control, but it's utterly ignored. In both cases, the csv rows execute repeatedly with no delay at all.
Has anyone got a recipe for this: Process full csv file every few hours?
Simple to say, strangely hard to do.
My setup: The 'CSV Data Config' uses 'Recycle on EOF':True 'Stop thread on EOF':False. Flow Control Action has 'Pause' Duration: 0 with the child timer set to the desired delay.
Thank you.
* please don't ask why, just assume I truly want this.
Flow Control Action, however the Pause doesn't actually pause for me.
This is kind of weird as it does work and introduces the pause when the thread reaches the sampler.
See the below image, with the Flow Control Action sampler disabled JMeter runs requests as fast as it can and when I enable it JMeter runs requests each 2 seconds according to the configured delay
With regards to "counter-intuitively" behaviour:
As per Timers documentation:
Note that timers are processed before each sampler in the scope in which they are found; if there are several timers in the same scope, all the timers will be processed before each sampler.
Timers are only processed in conjunction with a sampler. A timer which is not in the same scope as a sampler will not be processed at all.
To apply a timer to a single sampler, add the timer as a child element of the sampler. The timer will be applied before the sampler is executed. To apply a timer after a sampler, either add it to the next sampler, or add it as the child of a Flow Control Action Sampler.
Timers also obey JMeter Scoping Rules
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 using JMeter in order to test some environment. I build a thread group in JMeter that includes a couple of https requests with a delay between each of them.
somthing like this:
1. https request
2. random delay
3. https requst
4. random delay
6. https requst
7. random delay.
But for some reason the delays take much longer than they should and the test take much longer than it should (a delay of only 3 seconds or 3000 milliseconds takes 13 minutes). I try switching the random delays to constant ones but it still takes longer.
I tried searching online for a reason but I couldn't find a clear answer.
You should put the delay level under the request so it will impact only a single request,
Currently each delay affecting all the requests in the same level and that is causing the inconsistency
See JMeter's execution order
The only reason I can think of is that your test setup violates JMeter Scoping Rules
If you design your test like this:
All 3 timers will be executed before each request so instead of 3 seconds of waiting time after sampler you will get 9 seconds of waiting time before each sampler
If you want to apply a random delay before each sampler - leave only one timer.
If you want to apply different delays before each sampler - make timers children of the respective samplers:
If you want delay after the sampler instead of before the sampler - use Flow Control Action sampler instead of timer
I am working on stress test, but my first sampler floods server with tons of requests with very little amount of time, so I want to make a delay between each thread using request.
Test structure:
Thread1 - Sampler1 (for example: access login form)
Delay (custom seconds)
Thread2 - Sampler1 (for example: access login form)
Delay (custom seconds)
ThreadN - Sampler1 (for example: access login form)
Delay (custom seconds)
Thread1 - Sampler2
Delay (custom seconds)
Thread2 - Sampler2
Delay (custom seconds)
<...>
Synchronizing Timer
All threads realeased with final sampler (this part works)
I tried to put timers as samplers parents or childs. Probably I am missing something, because non of the timers are working for me.
I've found similar problem solutions, but non of the worked for me:
JMeter - sharing a delay between requests across multiple ThreadGroups
Delays for each thread in Ultimate Thread Group
I would suggest using the stepping thread group via http://jmeter-plugins.org/wiki/SteppingThreadGroup/.
In the 'thread scheduling parameters' section, you'll note you're able to specify the maximum number of threads to run at peak, but you're also also to slowly instantiate threads as you need them.
Very plainly, the setup below says "When I run this test, I'm eventually going to want 100 threads, but when I first start the test, wait 15 seconds, then only start 10 threads. Then add another 10 threads every 120 seconds. Once we reach max threads, keep working for 180 seconds, then slowly peel off 5 threads every 15 seconds.
This should meet your need.
As per your Test Plan description, you can use 1 of the timers mentioned below:
Gaussian Random Timer
Constant Timer
Hope this will help..
Constant Timer would be best option as per your mentioned requirement.
You can use 'Ultimate Thread Group' instead of regular Thread Group. There is 'Initial Delay' in ultimate thread group which will help you to achieve your requirement.
I have the following scenario to emulate in jMeter:
100 users logging in once and doing search every 30 secs, with think time 5 secs.
How do I implement this?
Right now I have something like this:
ThreadGroup(100usrs)
+-- OnceOnlyController(LogIn)
+-- LoopControler(Search)
+-- Timer(5s)
But I have no idea how to do the 30 secs delay between the Search instances.
Is it even possible or do I have to use some workaround?
Any help appreciated.
I think you have to add another timer as a child of LoopController: Timer(30). Your search requests are under the scope of that controller and your 30s timer should be there too.
http://jmeter.apache.org/usermanual/component_reference.html#timers
If you want to have a fixed delay between the search samples whatever response time of the Sample is then Orkito solution is not the right one.
His solution will add a 30 s delay before the search sample, so if search takes more time than expected your request will run each 30s + Time taken by search sample.
If you want to have a fixed delay between the search samples whatever response time of the Sample then solution is described here:
http://blog.milamberspace.net/index.php/2008/08/15/jmeter-fixer-la-duree-de-repetition-dune-requete-87.html
It's in french but there are screenshots and translation service should do the job.
Another important point to note:
Note that timers are processed before each sampler in the scope in which they are found; if there are several timers in the same scope, all the timers will be processed before each sampler.
Timers are only processed in conjunction with a sampler. A timer which is not in the same scope as a sampler will not be processed at all.
To apply a timer to a single sampler, add the timer as a child element of the sampler. The timer will be applied before the sampler is executed. To apply a timer after a sampler, either add it to the next sampler, or add it as the child of a Test Action Sampler.
Instead of use Constant Timer you should use Constant Throughput Timer, because this timer considers also Sample time(that is the execution time of each sample).
If you use a Constant Timer, you will have delay piled from each sample execution