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Pan through the historical data shown in a chart

Before you begin

Open or create a view with charts containing metrics data. For more information, see Work with charts in the Monitoring Dashboard. For general information about the controls you can use to pan and zoom in and out of the metrics data generated in a chart, see Pan and zoom the metrics data shown in a chart.

For general information about Monitoring Dashboard charts, see The Parts of a Chart.

Under certain circumstances, described below, you can scroll back and forth through a time series chart's history to see both historical and current metrics data for the chart. Historical data is always retrieved from a WLDF archive, which is available if you have configured the WLDF Harvester to gather metrics data and created that archive. For more information about how this is handled, see Understanding How Data is Collected and Presented.

To scroll through historical data:

  1. Make sure that WLDF is configured to collect the metrics data you want to monitor. See Configuring the Harvester for Metric Collection.
  2. Select the chart containing the metrics you want to monitor.

    Note that to view historical data retrieved from a WLDF archive, the metric attribute represented in the chart must be the same as the one in the archive. That is, it must correspond to the same specific MBean instance.

  3. Pan the chart to display historical metrics data by using either of the following methods:
    • Use the chart overview — Click the highlighted portion of the chart overview control and drag it to the time span segment you want to display in the chart viewport. If the chart encompasses data from a lengthy interval of time, you might find that using the overview control for panning is very efficient. As you drag the highlighted portion, a message is displayed that shows the beginning and end times of the intervals you are scrolling through.
    • Using the left pan button — Click the left pan button repeatedly until the desired time span segment is displayed. By default, panning the metrics data in the viewport is done in increments of 20% of the time span that is shown. For example, if the chart viewport displays metric values for the five minute interval of 12:10:00 through 12:15:00, clicking the left pan button changes the interval to 12:09:00 through 12:14:00.

    While you pan, you can hover the mouse pointer over the chart overview to display a note window that identifies the specific time span segment currently displayed in the viewport, as well as the total time span represented in the chart. For more information about the details that are displayed in the note window, see Display summary notes about metrics and charts.

    If no archived data is available for a chart, only the data available in the cache of actively polled metrics can be displayed. If you scroll to a point earlier than the data available in the cache, no data is displayed in the chart.

    If you scroll back to view historical data that is not backed by the WLDF archive, the data can expire from the cache while it is still displayed in the chart. If this happens, you will not be able to view that historical data again once you scroll away from it. To alert you that the data points have expired, the chart behind those data points is darkened, and tooltips for the chart and for the expired data points display messages to report that the data has expired.

    By default, panning metrics data is done in increments of 20% of the time interval that is shown. For example, if the chart displays metric values over a 5 minute interval, panning is done in increments of one minute. You can change the panning increment percentage in the Dashboard Preferences dialog box, as explained in Set global chart properties.

  4. To reset the chart viewport to display the latest time interval of metrics data:
    1. Select the chart menu.
    2. Choose Reset Chart Viewport.

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