it's all about the Performance Testing
Representational State Transfer (REST) uses the HTTP request method, and the most popular are GET, POST, PUT and DELETE. Responses to these requests return status codes indicating success or failure as well as any applicable headers, and JSON representing the affected fields (or nothing) in the message body. The following sections describe how you can easily write a JMeter script with one of these methods.
In POST requests, you can fill in both the body and the headers. You can also specify query parameters in path. The HTTP headers, which contain metadata, are tightly defined by the HTTP spec. They can only contain plain text and must be formatted in a certain manner. To specify headers, you’ll need the HTTP Header Manager, and the most common headers are Content-Type and Accept.
Post Body can be useful for the following requests: GWT RPC HTTP, JSON REST HTTP, XML REST HTTP, and SOAP HTTP Request.
For instance, we use the server name: localhost.8020
Path : /rest/management/profiles/Dev-SOAINTGR/testruns
Body : <testRun category=”performance” platform=”Windows” versionMajor=”5″ versionMinor=”1″ versionRevision=”1500″ versionBuild=”111″ />
Note:- replace the server name(URL), path and soap body with your required parameters
And header: Content-Type: text/xml
Refer below picture
Now add the view results in tree listener and run your test.