> For the complete documentation index, see [llms.txt](https://docs.fractalworks.io/joule/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.fractalworks.io/joule/components/analytics/analytic-tools/window-analytics/sliding-window.md).

# Sliding window

## Objective

Sliding windows, unlike tumbling windows, output events only for points in time when **the content of the window actually changes**.

In other words, when an event enters or exits the window. Every window has at least one event. Events can belong to more than one sliding window.

## Time based windows

### Example

Configures a sliding time based window with a size of 10 seconds using an analytical slide window of 7 seconds.

```yaml
time window:
  emitting type: pageFailures
  policy:
    type: slidingTime
    slide: 7
    window size: 10
    time unit: SECONDS
```

### Attributes schema

<table><thead><tr><th width="155">Attribute</th><th width="280">Description</th><th width="220">Data Type</th><th data-type="checkbox">Required</th></tr></thead><tbody><tr><td>window size</td><td>Size of window with respect to timeUnit</td><td>Long</td><td>true</td></tr><tr><td>slide</td><td>Time interval to shift in to next window</td><td>Long</td><td>true</td></tr><tr><td>time unit</td><td><p>TimeUnit used for configuring window trigger. Supported types:</p><ul><li>NANOSECONDS</li><li>MICROSECONDS</li><li>MILLISECONDS</li><li>SECONDS</li><li>MINUTES</li><li>HOURS</li><li>DAYS</li></ul></td><td><p>TimeUnit</p><p>Default: MILLISECONDS</p></td><td>false</td></tr></tbody></table>

## Event count based windows

### Example

Configures a sliding window with a maximum of 1000 events with a slide size of 300 events.

```yaml
time window:
  emitting type: pageFailures
  policy:
    type: slidingCount
    window size: 1000
    slide: 300
```

### Attributes schema

<table><thead><tr><th width="160">Attribute</th><th width="285">Description</th><th width="201">Data Type</th><th data-type="checkbox">Required</th></tr></thead><tbody><tr><td>window size</td><td>Maximum number of events before triggering window processing</td><td>Long</td><td>true</td></tr><tr><td>slide</td><td>Number of latest events to shift in to the next window</td><td>Long</td><td>true</td></tr></tbody></table>


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.fractalworks.io/joule/components/analytics/analytic-tools/window-analytics/sliding-window.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.