For example, you can save data to a file or illustrate the results with a chart. Listeners - These elements are used to post process request data.This tutorial focuses on the Web service requests only. Samplers - These elements are configurable requests to the server HTTP, FTP, or LDAP requests.The scheduler also allows you to set the start and end of the run time. The loop count defines the running time for a thread. For example with 5 threads and 10 seconds of ramp-up time, it will take 2 seconds between each thread creation. Each thread simulates a user and the ramp-up period specifies the time to create all the threads. Thread group - These elements are used to specify number of running threads and a ramp-up period.The simplest test plan normally includes the following elements: To create a load test in JMeter build a test plan, which is essentially a sequence of operations JMeter will execute. It also exposes an API that allows you to run JMeter-based tests from a Java application. A thread group is designed to simulate a concurrent load. The loop simulates sequential requests to the server with a preset delay. A typical JMeter test involves creating a loop and a thread group. It is Java based and is highly extensible through a provided API. JMeterĪpache JMeter is a tool that can be used to test applications utilizing HTTP or FTP servers. We also discuss how to measure the data and interpret results displayed on graphical tools provided with JMeter chart. The example test plan illustrates the creation of a test plan, thread group, loop, and a Web service request. In particular we demonstrate it by deploying a simple Web service on BEA WebLogic Server 9.0. In this article we show how JMeter can be used to load test Web services. The software features FTP and HTTP requests and extensible custom scripting features. It can be used to analyze overall server performance under simulated heavy load. This type of test not only provides an absolute measure of system response time, but also targets the regressions on server and application code, examines if the response from the server matches the expected result, and helps to evaluate and compare middleware solutions from different vendors.Īpache JMeter-a performance testing framework from Apache, has been widely accepted as a performance testing tool for Web applications. Several questions should be addressed at system performance analysis: will the system or server be able to process simultaneous requests coming from hundreds, or thousands of clients, and, what is the frequency of requests the system can handle. Early identification of software load limitations helps to configure the system appropriately to avoid unexpected crashes. Inclusion of performance estimates into planning and development cycles ensures that the application delivered to a customer satisfies high load, availability and scalability requirements. Performance testing is an important part of any distributed or Web application testing plan.
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