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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 ↗ and tell us more about what you are building.