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Configure options for Grafana's bar gauge visualization |
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Bar gauge | 100 |
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Bar gauge
Bar gauges simplify your data by reducing every field to a single value. You choose how Grafana calculates the reduction. This visualization can show one or more bar gauges depending on how many series, rows, or columns your query returns.
{{< figure src="/static/img/docs/v66/bar_gauge_cover.png" max-width="1025px" alt="Bar gauge panel" >}}
The bar gauge visualization displays values as bars with various lengths or fills proportional to the values they represent. They differ from traditional bar charts in that they act as gauges displaying metrics between ranges. One example is a thermometer displaying body temperature in a bar filling up.
You can use a bar gauge visualization when you need to show:
- Key performance indicators (KPIs)
- System health
- Savings goals
- Attendance
- Process completion rates
Configure a bar gauge visualization
The following video shows you how to create and configure a bar gauge visualization:
{{< youtube id="7PhDysObEXA" >}}
{{< docs/play title="Bar Gauge" url="https://play.grafana.org/d/vmie2cmWz/" >}}
Supported data formats
To create a bar gauge visualization, you need a dataset querying at least one numeric field. Every numeric field in the dataset is displayed as a bar gauge. Text or time fields aren't required but if they're present, they're used for labeling.
Example 1
| Label | Value1 | Value2 | Value3 |
|---|---|---|---|
| Row1 | 5 | 3 | 2 |
The minimum and maximum range for the bar gauges is automatically pulled from the largest and smallest numeric values in the dataset. You can also manually define the minimum and maximum values as indicated in the Standard options section.
You can also define the minimum and maximum from the dataset provided.
Example 2
| Label | Value | Max | Min |
|---|---|---|---|
| Row1 | 3 | 6 | 1 |
If you don’t want to show gauges for the min and max values, you can configure only one field to be displayed as described in the Value options section.
Even if the min and max aren’t displayed, the visualization still pulls the range from the data set.
Example 3
The bar gauge visualization also supports multiple records (rows) in the dataset.
| Label | Value1 | Value2 | Value3 |
|---|---|---|---|
| Row1 | 5 | 3 | 2 |
| Row2 | 10 | 6 | 4 |
| Row3 | 20 | 8 | 2 |
By default, the visualization is configured to calculate a single value per column or series and to display only the last set of data. However, it derives the minimum and maximum from the full dataset even if those values aren’t visible. In this example, that means only the last row of data is displayed in the gauges and the minimum and maximum values are defined as 2 and 20, pulled from the whole dataset.
If you want to show one gauge per cell you can change the Show setting from Calculate to All values and each bar is labeled by concatenating the text column with each value's column name.
Panel options
{{< docs/shared lookup="visualizations/panel-options.md" source="grafana" version="<GRAFANA_VERSION>" >}}
Value options
Use the following options to refine how your visualization displays the value:
Show
Choose how Grafana displays your data.
Calculate
Show a calculated value based on all rows.
- Calculation - Select a reducer function that Grafana will use to reduce many fields to a single value. For a list of available calculations, refer to Calculation types.
- Fields - Select the fields display in the panel.
All values
Show a separate stat for every row. If you select this option, then you can also limit the number of rows to display.
- Limit - The maximum number of rows to display. Default is 5,000.
- Fields - Select the fields display in the panel.
Bar gauge options
Adjust how the bar gauge is displayed.
Orientation
Choose a stacking direction.
- Auto - Grafana determines the best orientation.
- Horizontal - Bars stretch horizontally, left to right.
- Vertical - Bars stretch vertically, bottom to top.
Display mode
Choose a display mode.
- Gradient - Threshold levels define a gradient.
- Retro LCD - The gauge is split into small cells that are lit or unlit.
- Basic - Single color based on the matching threshold.
Value display
Choose a value display mode.
- Value color - Value color is determined by value.
- Text color - Value color is default text color.
- Hidden - Values are hidden.
Name placement
Choose a name placement mode.
{{% admonition type="note" %}} This option only applies when the orientation of the bar gauge is horizontal. When the bar gauge is in the vertical orientation, names are always placed at the bottom of each bar gauge. {{% /admonition %}}
- Auto - Grafana determines the best placement.
- Top - Names are placed on top of each bar gauge.
- Left - Names are placed to the left of each bar gauge.
- Hidden - Names are hidden on each bar gauge.
Show unfilled area
Select this if you want to render the unfilled region of the bars as dark gray. Not applicable to Retro LCD display mode.
Bar size
Choose a bar size mode.
- Auto - Grafana determines the best bar gauge size.
- Manual - Manually configure the bar gauge size.
Min width
Limit the minimum width of the bar column when the gauge is oriented vertically.
Automatically show x-axis scrollbar when there's a large amount of data.
{{% admonition type="note" %}} This option only applies when bar size is set to manual. {{% /admonition %}}
Min height
Limit the minimum height of the bar row when the gauge is oriented horizontally.
Automatically show y-axis scrollbar when there's a large amount of data.
{{% admonition type="note" %}} This option only applies when bar size is set to manual. {{% /admonition %}}
Max height
Limit the maximum height of the bar row when the gauge is oriented horizontally.
Automatically show y-axis scrollbar when there's a large amount of data.
{{% admonition type="note" %}} This option only applies when bar size is set to manual. {{% /admonition %}}
Legend options
{{< docs/shared lookup="visualizations/legend-options-1.md" source="grafana" version="<GRAFANA_VERSION>" >}}
Standard options
{{< docs/shared lookup="visualizations/standard-options.md" source="grafana" version="<GRAFANA_VERSION>" >}}
Data links
{{< docs/shared lookup="visualizations/datalink-options.md" source="grafana" version="<GRAFANA_VERSION>" >}}
Value mappings
{{< docs/shared lookup="visualizations/value-mappings-options.md" source="grafana" version="<GRAFANA_VERSION>" >}}
Thresholds
{{< docs/shared lookup="visualizations/thresholds-options-2.md" source="grafana" version="<GRAFANA_VERSION>" >}}
Last, colors of the bar gauge thresholds can be configured as described above.
Field overrides
{{< docs/shared lookup="visualizations/overrides-options.md" source="grafana" version="<GRAFANA_VERSION>" >}}