Techniques used within JMeter to determine issues in the system include the Stepping and Concurrency Thread Groups. wait 1 second. chalz. Rather than generate a sample, the test element either pauses or stops the selected target. Jmeter : While Controller : Loop not getting executed for second itreration. 1 it's recommended to use JSR223 Test Elements and Groovy language for any form of scripting; If for some reason (I fail to see any valid reason though) you still want to do this using JSR223 Sampler instead of Flow Control Action sampler - the relevant code would be:When JMeter executes this Pre-Processor element, it stores the values in the variables which can be referenced by any Samplers within the same thread group. JMeter is mainly used for testing Web application or FTP application but currently, it is applicable in. I can think of 2 possible reasons which might cause premature ending of your test: CSV Data Set Config is configured to stop thread on EOF, make sure it's set up like at the image below: Flow Control Action sampler is configured to stop either thread or test Jmeter 5. 8. Constant Timer - will create a delay before each Sampler it its scope. Currently, Taurus script language allows only sequential execution of requests with no flow control abilities. Add Flow Control Action sampler after the logintokensso request and configure it to "sleep" for 30 seconds: Or if you have to use the timer for any reason you can still go for the Flow Control Action sampler but with zero delay and make your Constant Timer a child of this Flow Control Action sampler:1. Then Network tab. more complex calculations you can amend the properties somewhere in setUp Thread. 3 SamplerThe InfluxDB External reporting allows you to send metrics to your own InfluxDB database and display them in your own grafana dashboards. To reset variable for next thread loop iteration, add before While Controller a Flow Control Action and put inside it a preprocessor called User Parameters. xml file (in JMeter’s bin folder): 1. 2 Answers Sorted by: 1 You will have to use If Controller and Flow Control Action after your assertion OR You may use ctx variable from your JSR223 Assertion to. The accepted answer in this thread is from 2014 and does not seem to work any more. I don't think your Uniform Random Timer really works, according to JMeter Scoping Rules it really adds a delay only when it's run in context of a Sampler. # Anonymous User - Product Search group1. 📕 Related Resource: JMeter Tutorial: Getting Started With the Basics. ) with child Throughput Controller set X percents (X is integer, 0 <= X <= 100) - so than X% from N loops is integer value too. Improve this answer. 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. Provide details and share your research! But avoid. first thread group for API A has Contniue selected and 1 thread and ramp up is 1 and loop count Infinite is selected and Same user on each iteration is selected. We will need a regular Thread Group to contain our test, and to that we will add a “ Once Only Controller ” and a “ Loop Controller ”: Step 2. e. Ở đây ta sử dụng Uniform Random Timer. put("date", date. In general I don't think that: test which does nothing but opening connections. More information: 6 Tips for JMeter If Controller Usage; If controller per se doesn't add any pause, you need to put i. Stop JMeter test execution only after n assertion errors. I am using jMeter for my testing script. 8, you will be able to delay thread creation until the time the thread must start working. 2/ add a Flow Control Action with a duration equals to 120000 (2min) in child of your thread group :. 1 What are Logical Controllers 2 Once Only Controller 3 Transaction controller 4 Loop controller 5. Follow Control Action -> Add -> Timer -> Uniform Random Timer. Means for Ex: I have 3 Transactions In a scenario, with 3 re. com run it 50 times, in addition to the loop value =2, you specified for the Thread Group above. 0. 2. Here's the order the script is written:. Especially in combination with one of the other items above. 1 Answer. or add a Flow Control Action sampler between "Validate" and "Cancel" requests and configure it to "Pause" for 3000 milliseconds: Both options will create a 3 seconds delay between "Validate" and "Cancel" requests. If you just put the Flow Control Action - it will delay each thread (virtual user) separately. functions. In the thread group the duration is set to 300 sec. And if the test runs in 3 minutes, I would be too long, and all the values would. As of JMeter 5. version, etc. You can download a JMX of this example here and import it in your project using the JMeter project option. Usually, it is helpful when you need to define think times based on some unique algorithm which is not currently provided by JMeter. To pause (sleep) current or all thread for specified amount of time (duration is set in milliseconds). JMeter should generate propert HTTP Request sampler and HTTP Header Manager. 4. JMeter has become an industry-standard tool for conducting functional, load, performance, and regression tests on web applications. FifoTimeout=120 in user. It prevents the performance plugin from correctly comparing test results, basically random aggregated results are being matched. Jmeter test scenario setup with target transactions per hour. pdf__idx} More information: Using the While Controller in JMeterConstant Throughput Timer will try to slow down JMeter's throughput to the defined value by sleeping for the period of time before executing the Sampler if needed. Flow Control Action is just below the while controller i. In particular, JMeter does not execute the Javascript found in HTML pages. Share. You may directly click on New button from the toolbar or use keyboard shortcut key “Ctrl+L”. I'm new to jmeter so i need help in controlling the iteration after a specific amount of seconds. OctoPerf load testing - JMeter settings documentation page. Here you will see the process to perform JMeter Performance Testing in 5 steps: 1. 1. Add Flow Control Action sampler after the last request. jmeter. I have used jmeter 2. In the “Connection” section, click on “Settings…”. public class TransactionControllerextends GenericController implements SampleListener, Controller, Serializable. and last but not the least the browser is being shut down when your test ends, if you want to keep the browser open it's sufficient to configure your test so it would never end by adding i. 0 and 60008. 0 is out! article: Check resume video download between iterations in case you want the plugin to download from where it left off in the last iteration. REM JMeterを起動する jmeter. JMX’ extension. JMeter JMX Recording Postman collection Selenium Web Driver Edit a Virtual User Edit a Virtual User The design page. The controls for a thread group allow you to Set the number of threads for each group. You can transfer a value between Thread Groups by converting it into a JMeter Property. I wanted to check if I can use JMX dummy sampler to implement the same JSR223 timer? Flow Control Action (was: Test Action ) ¶ The Flow Control Action sampler is a sampler that is intended for use in a conditional controller. Video $130. For instance, if you want to save an HTTP request sampler with a listener, you can save it as a test fragment and use it in other. Also looking into Constant Timer source it seems that you need to provide a Long value so change these 60000. Each Thread Group in a JMeter Test Plan simulates a particular real-world application scenario. How to determine when thread group is finished I have 2 threadgroups (ignore the. Add a Flow Control Action and add in it a JSR223PreProcessor with this code. first thread group for API A has Contniue selected and 1 thread and ramp up is 1 and loop count Infinite is selected and Same user on each iteration is selected. Thanks in advance! while-loop; jmeter; Share. Step1: Create a Test Plan. In Windows you can do something like Invoke-WindowsApi "kernel32" ( [bool]) "DebugActiveProcess" @ ( [int]) @ (JMETER_PID). 0 was released this week! Since the last release in February 2018, this new version has many major and impactful changes to both improving user experience and bug fixes. 2. Tạo Flow control action: Add -> Sampler -> Follow Control Action Sau đó ta chọn thêm Timer cho Action này. out); Basically, it returns all the System Properties PLUS JMeter properties remote_hosts, jmeter. 1" 2020-04-14 Note: There might be more issues for flow control action when Break current loop is used, so if you have time please investigate. Sorted by: 10. The workaround is to add as first child of Loop Controller a Test Action (renamed to Flow Control Action since 5. To stop JMeter instance on all the remote machines : ALT + Z: To shutdown JMeter instance on all the remote machines: Right Arrow: To expand the. OS Process, Debug, and Flow Control Action Sampler. out files as. If you don't have Timers or Flow Control Action sampler or Inter-Thread Communication Plugin JMeter executes samplers as fast as it can immediately one after another. To pause (sleep) current or all thread for specified amount of time (duration is set in milliseconds). I will executed only once for every controller. get ('myVar'). Flow Control Action sampler with action to Stop the Current Thread; A JSR223 Test Element which conditionally stops the thread; So check your test plan and ensure that none of the above listed options is your case. UBIK LOAD PACK UBIK LOAD PACK. In general you should not be passing values between. If it is added at the Test Plan level then it acts as a global timer and the delay is added for all the samplers before the process. 1. 1 you're supposed to use JSR223 Test Elements and Groovy. this adds a "flow control action" after each page/transaction controller. If you want a standard pause (think time) between pages, you can use the "add think times to children". A Test Plan comprises of at least one Thread Group. The "Stop" action stops the thread or test after completing any samples that are in progress. To save only the elements located in a particular "branch" of the Test Plan tree, select the Test Plan element in the tree from which to start the "branch", and then click your right mouse button to access the "Save Selection As. bat file on windows. Tạo Flow control action: Thread Group -> Add -> Sampler -> Follow Control Action. def date = Date. Note: There might be more issues for flow control action when Break. Other (and the main factor) is your application response time because JMeter. Rather than generate a sample, the. Take a Look: JMeter Training. 0 was released this week! Since the last release in February 2018, this new version has many major and impactful changes to both improving user experience and bug fixes. Debug Sampler. Click on Add-> Non Test Elements-> HTTP (S) Test Script Recorder (HTTP Proxy server in older JMeter versions). If it is added under a sampler then the parent sampler will wait for the defined time. JMeter 5 has added more UI controls for script looping behavior. 1" 2020-04-14. Constant Timer. To open a new test plan (It may prompt to save the current unsaved test plan) CTRL + M. I am running a Jmeter Test Plan with an HTTP Request, to test the performance of a web service. Thread Groups is a collection of Threads. Now we can proceed with the demonstration: 1. or add a Flow Control Action sampler between "Validate" and "Cancel" requests and configure it to "Pause" for 3000 milliseconds: Both options will create a 3 seconds delay between "Validate" and "Cancel" requests. Or add JSR223 Sampler as the last request in the If Controller and put the following code into "Script" area. You can try out GitHub actions with a free. Each Sampler can be preceded by one or more Pre-processor element. Share. 30-second wait between iterations - Add Flow Control Action sampler and configure it to pause for 30000 milliseconds: Run the test for 60 minutes - find the relevant Thread Group configuration below: Roughly 24,000 calls per. 1. 2. As of JMeter 5. Jmeter - wait for a specific response and collect total response time. g. 2 (or to the latest stable version from JMeter Downloads page) as soon as possibleIf you want to introduce a delay between 2 requests there are following options: Add Flow Control Action Sampler before the 2nd request. Enter the port value that we have entered in the Port field of our browser. If there is another Sampler after it- you can add a Timer as a child of. jmeter. There is no need to have a counter, While Controller exposes a special variable, in your case it will be ${__jm__While Controller For Thumbnail-1 QA1. REM JMeterを起動する jmeter. 1" 2020-04-14 Note: There might be more issues for flow control action when Break current loop is used, so if you have time please investigate. · To apply the timer after a sampler, either add the Gaussian Random Timer as a child element of the next sampler or as a child element of Flow Control Action. Both the Flow Control Action (previously dubbed Test Action) sampler and the Results Status Action Handler post-processor have received new options to break the current loop as well as go to the next iteration of the current loop. We would like to show you a description here but the site won’t allow us. First and foremost thank you for the help. Now let’s discuss some commonly used samplers provided by Apache JMeter. JMeter timers obey JMeter scoping rules so if you want the Constant Timer to be applied to one specific sampler only - you need to make it a child of the sampler. Also you have options to continue execution, but move to next iteration using. My goal is to make the first 3 requests in a time X sec (about 10),. 0. Consider replacing the Constant Timer with the Flow Control Action sampler, it doesn't generate any SampleResult and being called exactly where it's placed just like. Tạo Flow control action: Add -> Sampler -> Follow Control Action Sau đó ta chọn thêm Timer cho Action này. Here is the problem. e. So JMeter will send a total of 2 * 50 = 100 HTTP Requests. Rather than generate a sample, the test element either pauses or stops the selected target. To set the "duration" value to "$ {thinkTime}, where thinkTime is defined in the "Dedfined Variables" controller, I have to edit and save each one. Start your free trial. requests. Asking for help, clarification, or responding to other answers. Add a module controller. JTL files with same columns are automatically merged into a single file named merged_X. JMeter supports a variety of samplers, such as HTTP Request, JDBC Request, FTP Request, and more. allows pauses to be included without needing to generate a sample. If you introduce artificial delay of 3 seconds - it will make the overall throughput lower. Add Flow Control Action sampler to the end of the "LoginAPI" thread group and configure it to "sleep" for i. You can control the number of users simulated (number of threads), the ramp up time (how long it takes to start all the threads), the number of times to perform the test, and optionally, a start and stop time for the test Sampler: tells JMeter to send requests to a server and wait for a response. You can give only the filename and JMeter will look for the CSV file and write results file into JMeter's "bin" folder (or the place where you launched JMeter from). Jmeter execute sampler only on last thread iteration. 5 there is no possibility to change these parameters in the runtime. bat (Windows) or Enter the command ‘jmeter’ (Linux/Unix). You may be interested. rampup=10 group1. ③ 保存したjmeter_ja. Watch on. Click on Thread Group. Ở đây ta sử dụng Uniform Random Timer. in this case the delay will be added after the last HTTP Request sampler. 4. If you introduce artificial delay of 3 seconds - it will make the overall throughput lower. sh file. Put your requests under the Loop Controller. last_sample_ok},)} it means that If Controller's children will only be executed if the previous Sampler wasn't successful. Irrespective of how much time the previous request took, it will apply the remaining time. Improve this answer. In case of HTTPS traffic import JMeter's self-signed certificate to Postman. Make the "token" Thread Group to loop forever. You can configure JMeter to "gather" all threads and tell them to wait for the specified amount of time together by adding a Flow Control Action sampler and a Synchronizing Timer with number of users to group by equal to the number of threads in your thread group But despite trying several different configs, Flow Control Action never runs. The next action to take after an in-thread sampler fails: Continue: Continue to perform subsequent operations. OS Process, Debug, and Flow Control Action Sampler Understand how to execute OS commands using OS process sampler. Dmitri T Dmitri. JMX’ extension. send another 500 requests. This way first thread group will execute the Login generating or refreshing the. Given you use Test Action my expectation is that you're sitting on one of the previous JMeter versions as this sampler has been renamed to Flow Control Action in JMeter 5. Controls the behavior of the flow, by either enabling or disabling flow behavior (such as logging) or by choosing a branch when the flow runs. Run Thread Groups in parallel. Jmeter passing two parameters to a custom function. These expressions are composed of: boolean operations && or ||. JMeter supports a variety of samplers, such as HTTP Request, JDBC Request, FTP Request, and more. Set HTTP Proxy to “localhost” and Port to “8080”. Basically the same as point 1 but if you need i. Either add a Constant Timer as a child of the "Cancel" request and set "Thread Delay" to 3000. Token can be passed from one thread group to another using __setProperty and __P () functions or. In addition you might want to check the Artifacts Directory and check jmeter. If you need rather separate script executions you can use your operating system scheduling mechanisms like Windows Task Scheduler or. Apart from this your "way to achieve the above" is correct. Subscribe to Our Channel : Flow Control Action sampler is used to modify the execution flow of JMeter by performing specific actions. Your while controller will have to check the iteration count only 2. He wrote it mainly to test the performance of Apache JServ (now called the Apache. Get full access to Mastering JMeter 5. 0. So you have 2 options: Either periodically send the request for the token refresh in another Thread Group (token TTL minus some reasonable number of seconds), the pause between "refreshes" can be introduced using Constant Timer or Flow Control Action sampler The approach of: Having a separate Thread Group to generate/refresh the token with 1 thread and the required number of loops. jmeter set up. It is designed to analyse and measure the performance and load functional behaviour of web application and variety of services. I need to calculate response time. The timer will be applied before the sampler is executed. 2. Flow Control Action sampler as a child of the If Controller and configure the desired delay in milliseconds there; Share. To open the online H elp page for the selected element. More information: A Comprehensive Guide to Using JMeter Timers. O’Reilly members experience books. Also be aware that starting from JMeter 3. Alternatively, select the appropriate Test Plan. usercount=10 group1. HTTP Request. Improve this answer. Select the “Manual proxy configuration” radio button. Flow Control Action is a sampler that is intended for use in a conditional controller. 21. Nhập thời gian bạn muốn: Action này sẽ “Pause” lại trong khoảng từ 600 ms -> 1000 ms. 1 Answer. Select Test Plan on the tree. Set this to 50. Switch from setUp Thread Group for “LoginAPI” to normal Thread Group and configure it to run either desired number of iterations or forever. I can't figure out why: JMeter. you need to amend your test plan configuration to include Synchronizing Timer with Number of Simultaneous Users to Group by set to 500 and replace the Constant Timer with the Flow Control Action sampler. Loop Controller. So just use this __Random () function directly where required. properties file as suggested by Dmitri T in one of my previous question for the same thing. The new options are highlighted in. Go to next iteration of Current Loop. Conclusion. Flow Control Action Sampler - will create a delay exactly where it's placed in. Once the condition is met you can use Flow Control Action sampler to stop the current thread: Share. Follow edited Feb 9, 2016 at 17:56. apc. If you want to add a delay between each iteration of each thread add a Flow Control Action Sampler as the first sampler and set the delay in the controller. JMX is an open test format that allows the test plan to be run in a text editor. Demo: JMeter Performance Testing. Improve this answer. e. Particular your case can be handled using If Controller and Flow Control Action Sampler combination; If you prefer or have to go for scripting - consider using the most performing language which is Groovy, it's recommended to use JSR223 Test Elements and Groovy language for scripting since JMeter 3. The correct way of creating a delay via script-based timer is using return keyword, the value should have Long data type and the delay is in milliseconds. Flow Control Action・・・Flow Control Action自身の実行を何秒遅延させるかを設定します。 「Sampler > Flow Control Action」の設定 Logical Action on Threa. Sau đó ta chọn thêm Timer cho Action này. In Windows you can do something like Invoke-WindowsApi "kernel32" ( [bool]) "DebugActiveProcess" @ ( [int]) @. err and jmeter. parse("yyyy. JMeter automatically treats HTTP Request samplers with status codes above 400 as failed so you don't have to go for scripting, you can stop the test using If Controller using the following condition: ${__jexl3("${JMeterThread. Hover the mouse on ‘Timers’. 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. Create a new JMeter test plan containing a few basic elements. Flow Control Action, however the Pause doesn't actually pause for me. . Component Properties - Properties that contain information about the duration and current state of the test. I'm scraping the token with JSON extractor, and parcing it using the BeanShell post-processor, by the following command:Navigate to JMeter_Home and execute the JMeter, which is saved as a . Given the placement of your Constant Timer according to JMeter Scoping Rules it's getting executed before each request which doesn't seem to be something you're looking for. . This can be. What is the Logic Controller? Logic Controllers let you define the order of processing request in a Thread. . Sorted by: 1. HTTP Request. You could use a JMeter variable or property to set a dynamic value. It describes the core concept of JMeter in layman’s terms to clear your basics and make a strong platform of performance testing skills using the JMeter tool. Sampler. Read the article to know more about different Launching modes of JMeter. 0. e. Third parameter can be used as a variable name to save random value. This could be an old bug in JMeter < 2. There are 2 options: Add Flow Control Action sampler as the last request in the If Controller and configure it like:. Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand ; Advertising Reach developers & technologists worldwide; About the company1 Answer. I don't know what I am missing. 4. Use Random JMeter function. I have refere this link. bat. Lets create a property file as given below. The simplest groovy code that could be written in the JSR timer is “return <delay time>” where the delay time is in. Add Flow Control Action sampler as the last request in the If Controller and configure it like: Or add JSR223 Sampler as the last request in the If Controller and put the following code into "Script" area. How can i pass multiple parameters in a single string in jmeter. The easiest solution would be creating a separate Thread Group with 1 virtual user and 1 HTTP Request sampler which will be refreshing the token. In the Thread Group control panel, enter Thread Properties as follows: Number of Threads: 100 (Number of users connects to the target website: 100) Loop Count: 10 (Number of. In order to use this script, a property named startTime exists. OS: AllSubscribe to Our Channel : you want to know how to use flow control action in jmeter or searching for a jmeter flow control action ex. Improve this answer. sh signal to the headless load stations during the load test itself), so I don't. this adds a "flow control action" after each page/transaction controller. I have a jmeter test plan below. Step 1. I'm trying to make a part of my thread group to be executed only in a last iteration of a thread. For variable delays, set the pause time to zero, and add a Timer as a child. log file. Definition 2: No. :To add a new Flow Control Action under a Thread Group/Controller: CTRL + 6: To add a new JSR223 PostProcessor under a Test Plan/Thread Group/Controller/Sampler:. Logic Controllers help you to control the flow the order of processing of samplers in a thread. Make sure that you understand every JMeter. If the threads are still running, i need to stop their execution and start the next iteration. . Loop to step 2, 30 times. You need to ensure that JMeter sends Connection header with the value of keep-alive. Phần 3: Sử dụng Regular Expressions làm việc với Session IDs và Tokens. Make the "token" Thread Group to loop forever. Add Flow Control Action sampler as the last Sampler in your "iteration" Add JSR223 Timer as a child of the Flow Control Action Sampler and put the following code. What is JMeter and Its Brief History. flow-1-50 in 1 minute, then 50-100 in 2nd minute, then 100-150 in 3rd minute. Listen for response 4. A Constant Timer element runs in the context of. last_sample_ok}"=="false",)} and add Flow Control Action sampler as a child of the If Controller. jmeter pass multiple values to variable in Body Data. 1. Apart from this your "way to achieve the above" is correct. 1 Samplers¶ Samplers tell JMeter to send requests to a server and wait. A Constant Throughput Timer element sets the Target Throughput property to your desired rate of samples per minute. 1. Via Flow Control Action Sampler (in conjunction with the If Controller) Via any of your JSR223 Test Elements as. 1 I noticed that the Constant Throughput Timer is unable to control the tests throughput if a Test Action / Flow Control Action is used after the Constant Throughput Timer declaration. Instead, you use an element of the Constant Throughput Timer , Constant Timer , or. jmx: jmx file. Other than load testing, you also. Since OctoPerf operates JMeter in the background, it is also possible to use JMeter functions. Compile the source code of the plugin and put it in the /lib/ext. 3 Microsoft Windows 10 Enterprise 64-bit java version "14. 3 Microsoft Windows 10 Enterprise 64-bit java version "14. If you want to add a random delay consider using JMeter function Random $ {__Random (1000,5000,)} Share. Basically, each Thread simulates one real user request to the server. Replace the Timer with a Flow Control Action PAUSE and you will have the behaviour that you want. I want to send all the records/data with packets of 50 records (all different) per minute in jmeter. Share. 11 hours and 30 minutes using Flow Control Action sampler; Pass the token to the main Thread Group which is doing the endurance test by saving it into a JMeter Property in first Thread Group and reading it using __P() function in second Thread Group0. Introducing the Synchronizing Timer will act as a "rendezvous" point so JMeter will wait until all the threads are available and then all of them will start "waiting" for 10 minutes at the same time. Phần 2: Hướng dẫn xây dựng kịch bản test. I use JMeter v5. We try to provide alternatives in the various languages supported by JMeter when possible. To do that, I tried to configure the thread group like this : Number of Threads = 3000 and Loop Control = 1. Flow control Action - This is special type of Sampler,. I can configure request parameter and other details, but I need how to implement only my mentioned definition and it's report. Flow Control Action sampler is used along with the logical controllers to control the sampler execution. 0. 4 - Flow Control Action Sampler. In this course, you’ll learn to invoke key features of the latest version of this testing tool to achieve peak performance for your web applications, all the while improving the testing team’s productivity by developing realistic and scalable test plans and automation. Add Flow Control Action sampler to the end of the "LoginAPI" thread group and configure it to "sleep" for i. Flow Control Action is a sampler that is intended for use in a conditional controller. Robust: leverage proven open-source technologies like JMeter. The delay can be introduced by either using a. So basically throughput is the number of requests which JMeter was able to within test duration time frame. 5 minutes after the POST request. TCP Sampler. In this YouTube Shorts video, we will be exploring the Flow Control Action Controller and Sampler in JMeter. Introduction to Jmeter ; Downloading and Installing JMeter ; Configuring Jmeter Classpath ;. To pause (sleep) current or all thread for specified amount of time (duration is set in milliseconds). The Loop Controller is a way of moving the number of iterations your samplers run away from the Thread Group to provide more control over your scenario profile. Add Thread Group. URL of your influxDB database in regards to the OctoPerf load generators. Let’s assume that we have a basic script with two request samplers: the first request sampler is located one step before the. Here is some more info about JSR223 Assertions and how to Script JMeter Assertions. Pause for 1 second } 5. Right click on Test Plan > Add > Non-Test Elements > HTTP (S) Test Script Recorder. In this course, you’ll learn to invoke key features of the latest version of this testing tool to achieve peak performance for your. Controls the behavior of the flow, by either enabling or disabling flow behavior (such as logging) or by choosing a branch when the flow runs. 0. AJP/1. 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. This tutorial provides basic and in-depth knowledge of the Apache JMeter Performance Testing tool.