Loadrunner-analyzing Scenario Execution Chapter 5

Analyzing Scenario Execution • After running a scenario, you can use LoadRunner’s graphs and reports to analyze the performance of your application.

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Analyzing Scenario Execution After running a scenario, you can view a summary of the results to determine how your system performed. You can view the results in several ways: • The Vuser output file, output.txt, contains a full trace of the scenario run for each Vuser. This file is located in the scenario results directory. • The Controller Output window displays information about the scenario run. If your scenario run fails, look for debug information in this window. • The Analysis graphs and reports provide information about transactions and Vusers that can be used to determine system performance. You can study individual graphs or you can compare graphs from several scenarios using Cross-Scenario analysis. • The Spreadsheet and Raw Data views display the actual data used to generate the graph in a spreadsheet format. • The Export data utility enables you to export scenario results to text or database files for use with external applications such as spreadsheet programs. Krish Hegde

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Starting the Analysis • The Analysis is the LoadRunner component that processes results gathered during a scenario execution and generates graphs and reports. You can open the Analysis through the LoadRunner program group or directly from the Controller. • To open the Analysis directly from the Controller, select Results > Analyze Results. This option is only available after running a scenario. It automatically takes the latest result file from the current scenario, and opens it. Krish Hegde

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Collating execution Results • When you run a scenario, by default all Vuser information is stored locally on each Vuser host. After scenario execution the results are automatically collated or consolidated

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Analysis Graphs & Reports LoadRunner’s graphs and reports are divided into the following categories: • Activity: Activity graphs and reports provide information about the number of Vusers and the number of transactions executed during the scenario run. • Performance: Performance graphs and reports analyze Vuser performance and transaction times. • Web: Web graphs provide information about the throughput and hits of Web Vusers. Krish Hegde

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Viewing part of a Scenario • You can instruct LoadRunner to calculate graphs and reports based on a part of the scenario. To do that, filter time slots. • Choose Options > Time Filter in the Analysis window.

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Working with Analysis Graphs • LoadRunner also provides tools which enable you to modify the way that graphs are displayed. For each graph you can: – filter specific transactions and Vusers – enlarge a section of the graph – change the interval of the x-axis

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Transaction Response Time

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Working with Analysis Report • In order to view a report, you must generate the report from the LoadRunner Analysis window. LoadRunner reports are displayed in a Report Viewer. You can print, save, or export the data using the viewer. • To display a report: 1 In the Analysis window, choose File > Open to open the desired results file. 2 From the Reports menu choose a report. The report is generated and displayed. You can display multiple copies of the same report. Krish Hegde

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Reports

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Exporting Data from Analysis • • • •

You can export performance data to a spreadsheet application or to a statistical analysis application for further processing. You can export from: Graphs - Use the Spreadsheet or Raw Data view to copy and paste data directly into a spreadsheet program or save graph data as an Excel file. Analysis Window - Generate raw data text files with performance information. Reports - Save report data in a format compatible with a spreadsheet application or Microsoft Mail.

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Analyzing Scenario Activity •

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After running a scenario, you can analyze the Vuser activity that occurred during the scenario to check that the scenario ran as planned. You can use the following graphs or reports to analyze Vuser activity: Running Virtual Users Graph Rendezvous Graph and Report Transactions per Second Graph (Passed) Transactions per Second (Failed) Graph Failed Transactions Report Failed Vuser Report Scenario Execution Report Krish Hegde

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Performance Graphs • LoadRunner allows you to generate graphs that show scenario activity or overall scenario performance. Scenario performance graphs and reports let you analyze Vuser behavior throughout the scenario. • The Performance graphs map the transaction response time, and other general information about the scenario. Krish Hegde

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Cross Scenario Analysis • LoadRunner cross-scenario analysis graphs allow you to compare results and performance data from various scenarios on a single graph. • You can filter graphs to display selected scenarios, transactions, or Vusers. • By comparing the scenario results, you can determine which Vusers had acceptable response times and what event caused a bottleneck. Krish Hegde

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Web Vuser Graphs • After a scenario run, you can use graphs to analyze web server performance. Web Vuser graphs can help you analyze the behavior and performance of your web site.

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• Questions?

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