> ## 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.value` `percent_change_``greater_or_equal 40)` |

## Payload Configuration

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