Read a Full Page Chart

Topics marked with * relate to features available only in vFabric Hyperic.

Contents of a Full Page Chart

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Observed Measurements

Each bar on a chart represents a timeslice that is 1/60 of the selected metric display range. A chart can plot a maximum of 60 points. The value of the Y-axis at the top of the bar is the observed metric value for that timeslice. What the value represents varies by the nature of the metric:

  • Static — For a static metric, one whose value does not vary over time (for instance a timestamp), the plotted value corresponds to a single measurement.

  • Dynamic — For a dynamic metric, one whose value may go up or down over time:

    • The plotted point is the average of the values collected over the timeslice that ended at the time shown for the bar in the X-axis. The length of time over which the value was averaged depends on the current metric display range. For a display range of eight hours, each charted point represents the average of the preceding eight-minute period (8 hours / 60 time slices along the X-axis = 8 minutes). If the metric is collected every 60 seconds, and the chart's display range is 60 minutes, each of the 60 plotted points on the graph represents the single, observed value for the metric at a single point in time.

    • The I-bar superimposed on the vertical bar shows the range of values collected during the timeslice.

  • Trends Up and Trends Down — For a cumulative metric, one whose values either always increases or decreases, (such as bytes served, uptime, minimum response time), the plotted point is the maximum (or minimum) value for the time slice. The value shown for a metric that for trends up or down metrics is not the average over the timeslice.

More About Timeslices

Charts are divided into a maximum of 60 slices, where each slice represents the same amount of time, over any display range the user chooses. For example:

  • If the charted metric's collection interval is 5 minutes and the selected metric display range is one hour, during which the metric value was collected 12 times, the chart will contain 12 time slices, and each slice will represent a single observed metric value.

  • If the metric display range is 5 hours, during which the metric value was collected 60 times, the chart will display 60 time slices, each will represent a single observed metric value.

  • If the selected display range is 10 hours long, during which the metric value was collected 120 times, the chart will display 60 timeslices – the maximum — and each bar will summarize the 2 data points collected during the timeslice. For dynamic metrics, data points are averaged. For trends up or down metrics the highest/lowest value is plotted.

Peak, Average, and Low Values

By default, three colored horizontal lines appear on a metric chart that show the peak (pink), average (green) and low (blue) values collected for the metric for duration plotted.

Baseline and Acceptable High and Low Values

Available only in vFabric Hyperic

In vFabric Hyperic, this additional information may appear on a chart:

  • Baseline — The baseline value for the metric is shown as a tan horizontal line.

  • Low Range — A pink horizontal bar appears across the chart, between the low range value and the maximum value shown on the chart's Y-axis.

  • High Range — A green horizontal bar appears across the chart, between the high range value and the minumum value shown on the chart's Y-axis.

Learn About Baselines

See Baselines and Configure Metric Baselines.

Participating Resources

This section lists the resource and its metrics or the resources (if you are charting metrics for a group) that are plotted in the chart. Users can change the individual resource's metrics or the set of group member resources that are included in the chart.

Metric Baseline and Expected Range

This section allows the user to view and change the values current calculated or set for the metric baseline and the acceptable range of metric values (outside of which observed metric values will be considered out-of-bounds (OOB). This section is available only when a single metric is charted.

Filter Chart Data

The chart legend allows users to select types of data to include in the chart:

  • Actual: The observed metric value at any point in time

  • Peak: The highest observed metric value (this will be a horizontal line)

  • Average: The average of observed metric values across the entire graph (this will be a horizontal line)

  • Low: The lowest observed metric value (this will be a horizontal line)

  • Low Range: The user-specific lowest acceptable metric value (this will be a horizontal line)

  • High Range: The user-specific highest acceptable metric value (this will be a horizontal line)

  • Baseline: The HQ- or user-set baseline value (this will be a horizontal line)

  • Control Actions: Indicates on the chart when control actions where performed on the resource (to help correlate the actions with changes in performance)

Change Metric Display Range

  • At the bottom right of the "Metric Chart" section, either:

    • To move forward or back eight hours, click the back-arrow or the forward-arrow, respectively. The new display range is indicated.

    • For a specific date/time range:

      1. Click Edit Range.

      2. For a range counting back from the current time: Select a length of time.

      3. For a date/time range: Select a date/time range.

      4. Click Redraw.
        The metric charts on the screen automatically refresh to reflect the new display range. This display range value applies to all resource-monitoring screens.

Save Chart to Dashboard

  • At the top of the page, click Save Chart to My Dashboard, to add the chart to the "Saved Charts" portlet in the dashboard.

    • If you have edit permissions for multiple dashboards, the Tools menu will instead have an Save Chart to Dashboards option. Select the option to view a list of dashboards for which you have edit permissions. You can select one or more dashboards, and click Add to add the chart to those dashboards.

Save the Chart in CSV Foromat

  • At the top of the page, click Export to CSV.