Workers - Increased blob size limits in Workers Analytics Engine

We’ve increased the total allowed size of blob fields on data points written to Workers Analytics Engine from 5 KB to 16 KB.

This change gives you more flexibility when logging rich observability data — such as base64-encoded payloads, AI inference traces, or custom metadata — without hitting request size limits.

You can find full details on limits for queries, filters, payloads, and more here in the Workers Analytics Engine limits documentation.

export default {
	async fetch(request, env) {
		env.analyticsDataset.writeDataPoint({
			// The sum of all of the blob's sizes can now be 16 KB
			blobs: [
				// The URL of the request to the Worker
				request.url,
				// Some metadata about your application you'd like to store
				JSON.stringify(metadata),
				// The version of your Worker this datapoint was collected from
				env.versionMetadata.tag,
			],
			indexes: ["sample-index"],
		});
	},
};

worker.tsts

export default {
	async fetch(request, env) {
		env.analyticsDataset.writeDataPoint({
			// The sum of all of the blob's sizes can now be 16 KB
			blobs: [
				// The URL of the request to the Worker
				request.url,
				// Some metadata about your application you'd like to store
				JSON.stringify(metadata),
				// The version of your Worker this datapoint was collected from
				env.versionMetadata.tag,
			],
			indexes: ["sample-index"],
		});
	}
};