---
title: Limits
description: Review GraphQL Analytics API query limits.
image: https://developers.cloudflare.com/core-services-preview.png
---

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

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# Limits

The following limits apply to Workers Analytics Engine:

* Analytics Engine will accept up to twenty blobs, twenty doubles, and one index per call to `writeDataPoint`.
* The total size of all blobs in a request must not exceed **16 KB**. The 16 KB size limit for the blobs field applies to **each individual data point**, regardless of how many are included in a single request using writeDataPoints().
* Each index must not be more than 96 bytes.
* You can write a maximum of 250 data points per Worker invocation (client HTTP request). Each call to `writeDataPoint` counts towards this limit.

## Data retention

Data written to Workers Analytics Engine is stored for three months.

Interested in longer retention periods? Join the `#analytics-engine` channel in the [Cloudflare Developers Discord ↗](https://discord.cloudflare.com/) and tell us more about what you are building.

```json
{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"/directory/","name":"Directory"}},{"@type":"ListItem","position":2,"item":{"@id":"/analytics/","name":"Analytics"}},{"@type":"ListItem","position":3,"item":{"@id":"/analytics/analytics-engine/","name":"Workers Analytics Engine"}},{"@type":"ListItem","position":4,"item":{"@id":"/analytics/analytics-engine/limits/","name":"Limits"}}]}
```