I have a requirement where I have to load 1 million Telephone numbers from database and once that data is retrieved, need to call one REST endpoint using multiple threads. So I will load the data once and once data is loaded, use same dataset to hit rest endpoints concurrently.
I am a newbee to Jmeter and I am not able to figure out how to create thread groups to achieve this.
I would recommend
Using setUp Thread Group to load the data from the database, there add:
JDBC Connection Configuration to specify your database URL, credentials, etc.
JDBC Request Sampler to execute the query and save the results into JMeter Variables
JSR223 Sampler to write the results into a CSV file
Check out How to Retrieve Database Data for API Testing with JMeter article for example implementation.
Using normal Thread Group to create the concurrent requests:
CSV Data Set Config - to load the numbers from the CSV file so each virtual user would use the new number on next iteration
HTTP Request sampler to call your API
Related
I want to use 100 concurrent users in one thread group in Jmeter. but I want to each thread to use different user login password. how to achieve that?
full credit to Apache Jmeter documentation:
Some test plans need to use different values for different users/threads. For example, you might want to test a sequence that requires a unique login for each user. This is easy to achieve with the facilities provided by JMeter.
For example:
Create a text file containing the user names and passwords, separated by commas. Put this in the same directory as your test plan.
Add a CSV DataSet configuration element to the test plan. Name the variables USER and PASS.
Replace the login name with ${USER} and the password with ${PASS} on the appropriate samplers
The CSV Data Set element will read a new line for each thread.
UPDATE documentation link
https://jmeter.apache.org/usermanual/best-practices.html
There are multiple options depending on where do you want to keep the credentials.
The most commonly used approach is storing login/password combinations in the CSV file and using CSV Data Set Config for reading them. By default each JMeter thread will read the next line from the file on each iteration
If your credentials are in the database you can use JDBC PreProcessor
If you plan to run your test in Distributed Mode and don't want to worry about copying test data to all slave machines - there are HTTP Simple Table Server and Redis Data Set Config
More information: JMeter Parameterization - The Complete Guide
How Do that in jmeter by using JDbc or JSr223sampler,after completion of execution generate jtl/CSV results file,to take the results file particular values like samplers,average response time,90 percentage values and convert milli seconds and push to DB,how do the process tell me as soon as possible
Which DB? There is Backend Listener which have a couple of implementations, one of them - InfluxDbBackendListenerClient allows storing all (or specified) metrics into InfluxDB
See How to Use Grafana to Monitor JMeter Non-GUI Results - Part 2 for comprehensive steps on installation and configuration of JMeter and InfluxDB for real-time results storing
I am a Load Runner tester and would like to know how below requirements can be done in Jmeter.
Data parameterization - How can we implement unique and random data parameterization in Jmeter.
how do we get vuser id value for each virtual users in a Thread group?
If we need to initialize/load any data during vuser initialization (vuser_init() in load Runner) , how can we do it? Also, how do we call any function when vuser is ending, like vusr_end() in LoadRunner.
In Core JMeter:
For Data parameterization, use CSV DataSet , it will pick columns from CSV file and expose them as JMeter Variables you can use with ${varName}
To get user id, use jmeter function __threadNum()
There is no strict equivalent, for vuser_init you can use a Once Only Controller. For vuser_end, there is no equivalent
For parameterization:
CSV Data Set Config - for sequential data
Random CSV Data Set Config - for random data
HTTP Simple Table Server - for unique and random data, suitable for Distributed Testing (basically equivalent of the Virtual Table Server)
__threadNum()
Normally it is being done in:
vuser_init() - setUp Thread Group
vuser_end() - tearDown Thread Group
Hi I am new to JMeter.
Is it possible that I can input a CSV file (with 25 rows of unique customerID number) and use many HTTP (GET) URL request simultaneously for every row in the csv file?
Thank you for your response in advance.
Assuming that you have one thread group, with n threads, what you describe is the default behavior of CSV data set when you set the sharing mode to All threads. Every thread, will pickup the customer id from next line of the file.
Please see following link for details.
http://jmeter.apache.org/usermanual/component_reference.html#CSV_Data_Set_Config
I want to simulate a few hundred http request each with a different token and userId which I have in a database table.
What's the best way of setting up a jMeter load test to do this?
You can use JDBC Sampler to extract you data from DB to create a CSV and a JSR223 Sampler using groovy (add groovy-all.jar in jmeter/lib folder) to write the extracted values to a CSV file.
Then in the real plan , use CSV DataSet Config using the generated file.
Depending on how you want to use the dataset, you will play with Sharing mode attribute.
If you want to do both steps within the same plan you can use a Setup thread Group that will contain the JDBC Sampler part to write the CSV File, this will use 1 thread and then
the other part in regular Thread Group that will use the number of users you need.
One way is to put all your parameters into a csv file and use CSV Data Set Config in jmeter. Right click on the thread you have created - add- Config Element- CSV Data Set Config. Remember you need to set the Number of Threads(users) to match the number of users in your CSV file.