Only by learning these JMeter plug-ins can we design complex performance test scenarios

Why use jmeter What about thread group plug-ins ？

jmeter The built-in thread group plug-in simulates very limited pressure testing scenarios , When it is necessary to simulate complex pressure measurement scenarios , I recommend you to use jmeter Thread group plug-in .

How to download jmeter What about thread group plug-ins ？

Early versions of jmeter We can expand the functions we need , Directly provide the download address to download ,

But the latest jmeter Version no longer supports downloading plug-in packages directly , Instead, , We need to download a download Plug-in management tool to help us download plug-ins .

The download address of the plug-in management tool's official website is as follows ,

ttps://jmeter-plugins.org/downloads/all/

Click on “plugins-manager.jar” link , Wait for plug-in management jar After downloading the package , copy to jmeter In the catalog \lib\ext Next ,

If jmeter At this time, it is in the startup state , Need to restart jmeter, By the way ,jmeter The download address of the official website is http://navo.top/yIBzqe.

stay jmeter Window , Click the menu item in turn Option Options -》Plugins Manager, In the pop-up plug-in download window JMeter Plugins Manager in ,

Select tab “Installed Plugins”,

Type in the search box “Custom Thread Groups”

Check “Custom Thread Groups”, single click 【Apply Changes and Restart JMeter】, Wait for the thread group plug-in to download and restart jmeter.

Next is how to use the thread group plug-in ？ The commonly used thread group plug-ins are Ultimate Thread Group Plug ins and Custom Thread Groups plug-in unit . The two thread group plug-ins are introduced below .

01
Ultimate Thread Group plug-in unit
How to open Ultimate Thread Group plug-in unit ？ stay jmeter Window , Click the menu item in turn ： test plan -> Right click -> add to ->

Thread group ->[email protected] - Ultimate Thread Group, This opens Ultimate Thread Group plug-in unit .

The meanings of the columns in the following thread group execution schedule are as follows ：

Start Threads Count： The total number of threads started by the current line

Initial Delay/sec： Delay starting the thread of the current line , Company : second

Startup Time/sec： The time required to start all threads of the current line to peak , Company : second

Hold Load For/sec： The stable load time after the current row thread reaches its peak , Company : second Shutdown Time： Time required to stop all threads in the current line , Company : second

Use Ultimate Thread Group It can simulate simple concurrent scenarios 、2^n Step scene 、 Surge scenario 、 Jagged scene **. The following describes how to set these scenarios .

（1） Simple concurrent scenario settings

single click 【Add Row】, stay Start Threads Counts Column settings 100 Concurrent , Slow pressurization Startup Time The column value is 30sec complete , Keep running Hold Load For The column value is 60 second , Slow and reduce pressure Shutdown The column value is 10sec complete .

（2） Surge scene settings **

Surge scene setting features ：

The first 1 Secondary load 100 Concurrent , load 30sec, The relief 10sec, continued 60sec;

The first 2 Secondary load 200 Concurrent , Delay 100sec（=30sec+10sec+60sec）, load 30sec, The relief 10sec, continued 60sec; The first 3 Secondary load 100 Concurrent , Delay 200sec（=100sec+100sec）, load 30sec, The relief 10sec, continued 60sec;

Load for the fourth time 200 Concurrent , Delay 300sec（=200sec+100sec）, load 30sec, The relief 10sec, continued 60sec

Simulate a period of high pressure for a period of time , After a period of higher pressure , The pressure drops slightly. This kind of business system pressure like the waves .

02
Custom Thread Groups plug-in unit
How to open Custom Thread Groups plug-in unit ？ stay jmeter Window , Click the menu item in turn ： test plan -》 add to -》 Thread group （ user ）-》[email protected] - Stepping Thread Group, This opens Custom Thread Groups plug-in unit .

The following thread group execution plan parameters , As shown below , The meaning of each parameter is ：

this group will start * threads**： How many threads are loaded ,100,

First,wait for： How long to wait to start loading threads （ How many seconds does the first thread delay to start loading ）,0, Then start * threads**： How many threads are loaded for the first time ,0,

Next,add * threads every * seconds ： How many threads to load next time ,10, How long does the current run take to load the thread again ,

using ramp-up： Load thread time ,5 second , in other words 10 Thread in 5 Load in seconds Then hold load for： How long does the thread run after it is fully loaded ,60 second ,

Finally,stop * threads every … seconds**： How long to stop how many threads , Every time 1 Seconds to stop 5 Threads .

Custom Thread Groups Plug ins are often used to simulate load test scenarios .