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How to: Zoom in on a Region of the Graph

After a load test has finished, you can use zoom bars to zoom in and scroll to a region of the graph. By zooming in, you can examine the data that was generated during a load test run in finer detail.

NoteNote:

Zoom in available only when you are analyzing the result of a completed load test, not while you are observing the results of a running test. For more information, see Analyzing Load Test Results.

Before you change the graphs' display by zooming in or out or by scrolling, follow this procedure to display graphs.

To display graphs

  1. Run a load test until it is completed.

    For more information, see How to: Run a Load Test.

  2. At the end of the load test run, click Yes in the dialog box that asks about viewing results from the load test results store.

    - or -

    View the details of a previously run load test. For more information, see How to: View Results from a Repository.

  3. Click Graphs if your graphs are not displayed.

  4. If zoom bars are not displayed, click Show Zoom Controls.

    Two zoom bars are available for each graph. The zoom bar that controls vertical scale appears to the left of the graph. The zoom bar that controls horizontal scale appears under the graph.

    Each zoom bar has two handles. A handle is a rectangular area at each end of the zoom bar.

When you have multiple graphs displayed, you can keep them synchronized so that they display the same portion of the load test run.

To synchronize zooming and scrolling

  1. On the Load Test Analyzer, click Synchronize Horizontal Zoom Controls.

    When the Synchronize Horizontal Zoom Controls button is selected, zooming and scrolling the time scale of an individual graph also zooms and scrolls the time scale of the other graphs.

  2. Again, click Synchronize Horizontal Zoom Controls.

    When the Synchronize Horizontal Zoom Controls button is not selected, zooming and scrolling the time scale of an individual graph affects that graph only.

To zoom and scroll to a region of the graph

  1. On the zoom bar under a graph, drag the left-side handle to the right.

    This zooms in on the latter part of the test run. Similarly, dragging the right-side handle to the left zooms in on earlier parts of the test run.

  2. To zoom in on a particular area, slide both handles toward the center of a graph.

    The closer the two handles are to each another, the more you zoom in to display shorter, finer segments of the load test.

    Click the center section of the zoom bar and then drag it to scroll to a particular point in the load test.

To zoom to a region of the graph by clicking and dragging

  1. Click a graph at one end of the zoom area.

  2. Drag the mouse pointer to the other end of the zoom area.

  3. Release the mouse button.

    This magnifies the area that you defined by clicking and dragging.

The following procedure describes how to quickly zoom out without having to adjust the ends of the zoom bar.

To zoom out

  1. Right-click a zoomed-in graph.

  2. On the shortcut menu, select Zoom Out Horizontal.

    This zooms out to show the entire duration of the load test run.

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