> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mezmo.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Percentage Volume Increase

> Example Change Alert configuration that fires when data volume rises by a set percentage compared to the prior tumbling window period.

This is an example of an alert that is triggered when there is an increase in the volume of data beyond a set percentage.

## General Configuration

| Field | Value |
| - | - |
| Name | Volume increase by 40% |
| Description | Alert when volume increases by 40% compared to the prior period |

## Evaluation and Condition Configuration

| Field | Value |
| - | - |
| Alert Type | Change Alert |
| Event Type | Metric |
| Group by Field Paths | `.name` `.namespace` `.tags` |
| Operation | Sum |
| Window Type | Tumbling |
| Window Duration (minutes) | 15 |
| Alert Conditions | `if (.value percent_change greater_or_equal 40)` |

## Payload Configuration

| Field | Value |
| - | - |
| Severity | Warning |
| Message Style | Static |
| Subject | Volume Surge at \[name of Source] |