# Thresholds
<a name="thresholds"></a>

****  
This documentation topic is designed for Grafana workspaces that support **Grafana version 8.x**.  
For Grafana workspaces that support Grafana version 12.x, see [Working in Grafana version 12](using-grafana-v12.md).  
For Grafana workspaces that support Grafana version 10.x, see [Working in Grafana version 10](using-grafana-v10.md).  
For Grafana workspaces that support Grafana version 9.x, see [Working in Grafana version 9](using-grafana-v9.md).

Thresholds set the color of either the value text or the background depending on conditions that you define.

You can define thresholds one of two ways:
+ **Absolute** thresholds are defined based on a number; for example, 80 on a scale of 1–150.
+ **Percentage** thresholds are defined relative to minimum or maximum; for example, 80 percent.

You can apply thresholds to the following visualizations:
+ [Bar gauge panel](alert-panel-bar-gauge-panel.md) 
+  [Gauge panel](gauge-panel.md) 
+  [Graph panel](graph-panel.md)
+  [Stat panel](stat-panel.md)
+  [Table panel](table-panel.md)

## Default thresholds
<a name="default-thresholds"></a>

On visualizations that support it, Amazon Managed Grafana sets the following default threshold value: 80 = red; Base = green; Mode = Absolute.

The **Base** value represents minus infinity. It is generally the *good* color.

## Adding a threshold
<a name="add-a-threshold"></a>

You can add as many thresholds to a panel as you want. The Grafana workspace automatically sorts thresholds from highest value to lowest.

**Note**  
These instructions apply only to the stat, gauge, bar gauge, and table visualizations.

1. Choose the panel that you want to add a threshold to.

1. Choose the **Field** tab.

1. Choose **Add threshold**.

   Amazon Managed Grafana adds a threshold with suggested numerical and color values. 

1. Accept the recommendations or edit the new threshold.
   +  **Edit color** – Choose the color dot that you want to change, and then select a new color.
   +  **Edit number** – Choose the number that you want to change, and then enter a new number.
   +  **Thresholds mode** – Choose the mode to change it for all thresholds on this panel.

1. Choose **Save** to save the changes in the dashboard.

## Adding a threshold to a graph panel
<a name="add-a-threshold-to-a-graph-panel"></a>

In the graph panel visualization, you can use thresholds to add arbitrary lines or sections to the graph to make it easier to see when the graph crosses a particular threshold.

1. Choose the graph panel that you want to add a threshold to.

1. On the **Panel** tab, choose **Thresholds**.

1. Choose **Add threshold**.

1. Fill in as many fields as you want. Only the **T1** fields are required.
   +  **T1** – Both values are required to display a threshold.
     +  **lt** or **gt** – Select **lt** for less than or **gt** for greater than to indicate what the threshold applies to.
     +  **Value** – Enter a threshold value. The Grafana workspace draws a threshold line along the y-axis at that value.
   +  **Color** – Choose a condition that corresponds to a color, or define your own color.
     +  **custom** – You define the fill color and line color.
     +  **critical** – Fill and line color are red.
     +  **warning** – Fill and line color are yellow.
     +  **ok** – Fill and line color are green.
   +  **Fill** – Choose whether the threshold fill is displayed.
   +  **Line** – Choose whether the threshold line is displayed.
   +  **Y-Axis** – Choose **left** or **right**.

1. Choose **Save** to save the changes in the dashboard. 

## Deleting a threshold
<a name="delete-a-threshold"></a>

1. Choose the panel that you want to remove a threshold from.

1. Choose the **Field** tab. (Or, for a graph panel, choose the **Panel** tab.)

1. Choose the trash can icon next to the threshold that you want to remove. 

1. Choose **Save** to save the changes in the dashboard.