Trend Views

Trend views show the value of a metric across time. Trends show spikes or dips in activity and help identify whether a metric is increasing or decreasing. Trend views provide one or more of the following chart types:
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HID_Trend_Views
Trend views show the value of a metric across time. Trends show spikes or dips in activity and help identify whether a metric is increasing or decreasing. Trend views provide one or more of the following chart types:
  • Trend Chart
    View a traditional trend line for each device, component, or metric.
  • Stacked Chart
    View a stacked line on top of each other for each device, component, or metric.
Trend views displaying data up to the present moment may contain dips or spikes for the present moment as data is processed.
Maintenance indicators apply to all the devices and components in a site group. When the associated site group is selected in the context, maintenance indicators appear as shading in trend views. For more information, see Schedule Maintenance Indicators.
Trend views apply a lighter shading to show business hours. For more information, see Configure Business Hours Filtering.
Trend View Options
Trend views let you quickly change the trend lines that are displayed on the graph. The following options also apply to MultiTrend views:
  • To remove a metric from the chart temporarily, right-click the metric in the legend, and click
    Hide
    .
  • To add a metric back into the chart, right-click the metric in the legend, and click
    Show
    .
  • To hide all other metrics, right-click a metric in the legend, and click
    Focus
    .
  • To narrow the view on a precise time frame, click and drag across the time frame in the chart.
    Select a time frame of at least 30 minutes. For MultiTrend views, you must drill into an individual trend view before you can select a time frame.
  • To apply the precise time frame to the entire dashboard, click
    Apply to Dashboard
    at the bottom of the chart.
  • To revert the view to the default settings, click
    Undo
    in the lower-left corner.
Trend View Element Examples
Trend views can include the following elements:
A specific trend view might or might not include the following elements. A specific trend view might include elements in addition to following elements.
  • Baselines
    If available, the baseline trend line lets you determine whether utilization trends are changing. The baseline data
     
    that is plotted in many views shows statistical deviations from "normal" performance for a given statistic. For more information, see Baseline Calculations.
  • Events
    If available, events appear as flags indicating the times that the events occurred.
    Events are based on as-polled data. If a rollup is applied to the trend line, a threshold event might appear outside the trend line.
  • Trend Projections
    If available, projections on charts appear as dashed trend lines that predict future performance of metrics. Each projection is based on trends in recent values in the time frame of the chart. Projections help determine whether current performance is within normal bounds.
    By default, each projection includes a future time frame equivalent to one time beyond the current time frame. For example, if the time frame is the Last Hour, the projection shows values for the next hour.
    For views that support projections, you can show or hide the projection data by editing the view settings.
The following image shows the important elements of a trend view:
TrendView
TrendView
Configure a Trend View
To configure a trend chart, customize or edit a trend view. For standard view configuration details, see Customize Views.
Follow these steps:
  1. Select 
    Show
     or 
    Hide
     from the drop-down list to control any of the following trend lines or data points:
    • Projection
      The line that plots projected average values for twice the current time period.
    • 95th Percentile
      The line that plots the values in the top 5 percent of measurements that were taken during the reporting interval.
    • Events
      The data points that show when events were reported during the reporting interval.
    • Goal Line
      The line that plots the value that you selected as the goal for the metric in this view. This option is available only for some of the trend views.
    Not all trend line options are available for all trend chart types.
  2. Set a value for the 
    Goal Line
     if you selected to show it. 
    Goal lines serve as visual indicators of fixed metric values. For example, select a value within a critical threshold range to determine whether performance is approaching a degraded level quickly.
  3. Supply a label for the goal line to identify the value that you selected.
MultiTrend Views
MultiTrend views let you combine trend data from multiple components in a single-line trend chart. You can compare the data from up to 12 components in a single MultiTrend view. You can use MultiTrend views to view data from the following interfaces:
  • Multiple interfaces in a group
  • Interfaces in your inventory with the worst performance metrics
  • Interfaces on a single device
MultiTrend views require more page space than other types of views. To add a MultiTrend view to a dashboard, add it to a single-column area in the layout. Do not add a MultiTrend view to a small section on a dashboard layout.
MultiTrend views also require more space for the PDF output.
 The following image shows the important elements of a MultiTrend view:
MultiTrendView
MultiTrendView
MultiViews
MultiViews let you combine statistics from multiple interface charts in a single view. Use MultiViews to diagnose performance issues on a device. For example, you can compare the recent performance of all interfaces on a card in a single view. More MultiViews that query for different types of metrics are available in the Device category when you edit a dashboard.
MultiViews require more page space than other types of views. To add a MultiView to a dashboard, add it to a single-column area in the layout. Do not add a MultiView to a small section on a dashboard layout.
MultiViews also require more space for the PDF output.
The following image shows the important elements of a MultiView:
MultiView
MultiView
Configure a MultiTrend View or a MultiView
To configure a MultiTrend chart or MultiView, customize or edit a MultiTrend view or MultiView. For standard view configuration details, see Customize Views.
Follow these steps:
  1. Change the
    Sort Direction
    , which is Descending order (highest values first) by default. The sort direction determines which interfaces are reflected in the first pages of trend charts.
  2. Select one of the following 
    Standardized Axis 
    options for the Y-axis of each trend chart:
    • Fixed at 0 to 100
      Maintain a static range, 0 through 100, for the Y-axis.
    • Calculated
      Let the Y-axis adjust dynamically, based on the range of metric values that are included. The calculated setting is applied to all charts in the view.
    • Scale per Chart 
      Let the Y-axis adjust dynamically, based on the range of metric values for each chart in the view. The Y-axis scaling of one chart in a view does not affect the scaling of any other chart.
  3. Select one of the following options for the
    Chart Display Order
    :
    • Display by Metric
      Sort the interface charts by metric value, with the highest (most severe) values shown first, top to bottom.
    • Display by Name
      Sort the interface charts in alphanumeric order, by interface name.
Trend/Table Views
Trend/table views provide tables with data. As you hover over each metric, a related trend chart displays. The trend chart shows the metric value over the selected time range for each item. The table lets you see the values across the entire time range for each item being charted. Some out-of-the box trend/table views show a column with a line graph. For more information about these views, see Table Views.