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Testing Hacks. API Testing. Performance Test Results produced by LoadRunner software are used as a benchmark against other tools. LoadRunner is not only pioneer tool in Performance Testing, but it is still a market leader in the Performance Testing paradigm. There is no competitor tool in the market which could offer such wide variety of protocols vested in a single tool.
What is more convincing to pick LoadRunner in software testing is the credibility of this tool. LoadRunner tool has long established a reputation as often you will find clients cross verifying your performance benchmarks using LoadRunner.
LoadRunner works on a principal of simulating Virtual Users on the subject application. Why do you need Performance Testing? An estimated loss of 4. Imagine yourself waiting for 5 seconds when searching for Google or making a friend request on Facebook. The repercussions of performance downtime are often more devastating than ever imagined.
Only a 5-minute downtime of Google. When a software system is deployed by an organization, it may encounter many scenarios that possibly result in performance latency. A number of factors cause decelerating performance, few examples may include:. In a real-life situation, these all these users will not be at homepage but in a different section of the websites. How can we simulate differently. Once a VUser script is finalized, Controller is one of the main LoadRunner components which controls the Load simulation by managing, for example:.
Taking an analogy from our example controller will add the following parameter to the VUGen Script. HP LoadRunner Controller is responsible to simulate thousands of VUsers — these VUsers consume hardware resources for example processor and memory — hence putting a limit on the machine which is simulating them. As a general practice, Controller resides on a different machine and load is simulated from other machines.
Depending upon the protocol of VUser scripts and machine specifications, a number of Load Injectors may be required for full simulation. All the errors and exceptions are logged in a Microsoft access database, named, output. These graphs show various trends to understand the reasoning behind errors and failure under load; thus help to figure whether optimization is required in SUL, Server e.
JBoss, Oracle or infrastructure. Below is an example where bandwidth could be creating a bottleneck. To determine system caters to such needs, Performance Engineer needs to analyze application behavior with an abnormal load. Below is a graph LoadRunner generates to elicit bandwidth.
Planning can be further divided into small stages as described below:. Another function of a controller is to commands the Load Generators via Agent during the test execution which involves Which script needs to pick? How much load needs to generate and at what time? When to stop the test? Analysis: It helps to view, dissect and compare the results of the load tests.
Analysis tool displays the result graphs and statistics to validate the test result against the defined NFRs Non-functional requirement and to find out the bottleneck performance bugs. The analysis tool also generates a report based on the test result. Why LoadRunner? There are many reasons to choose Microfocus LoadRunner as a Performance Testing tool: LoadRunner has a simple and interactive user interface. It removes the drawbacks of manual performance testing with its user-friendly components.
LoadRunner reduces the requirement of physical testers by replacing real physical users with virtual users Vusers. Vusers emulate the behaviour of real users and create real-world load on the server. LoadRunner limits the requirement of excess hardware. Since there are no physical users so a single Load Generator machine can generate multiple user load and reduces the requirement of hardware or physical machines.
A controller has a single point of control over all the Vusers. Easy correlation method to handle the dynamic values coming from the server. Also, intelligent auto-correlation feature Supports mobile and cloud performance testing The flexibility of the controller helps to create the user load test of any pattern.
Live graphs and statistics of client-side performance metric during the test. LoadRunner also supports to monitor the network and server resources to identify the bottleneck.
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