---
header: High Volume Logging
lang: en
last_updated: '2021-03-09'
url: https://docs.fastly.com/products/high-volume-logging
---

Fastly's [real-time log streaming](https://docs.fastly.com/products/fastlys-full-site-delivery#real-time-log-streaming) features allow you to tune the performance of Fastly services, but are limited to a monthly average of two log statements per request, per service. For customers who need to increase this limit, Fastly offers High Volume Logging.

## Billing

High Volume Logging is billed based on the cumulative log statements streamed in excess of the Fastly's Full-Site Delivery [Real-Time Log Streaming](https://docs.fastly.com/products/fastlys-full-site-delivery#real-time-log-streaming) limits. Usage is calculated using the average size of all log statements multiplied by the number of statements in excess of the limit. The size is measured in log GBs streamed, pre-compression. Consider setting a \[spend alert]\(https://www.fastly.com/documentation/guides/account-info/billing/about-the-spend-alert-page/) for your account to automatically be notified when your month-to-date bill approaches or meets a specific dollar amount.

> **NOTE:** For more details about this product, including [pricing information](https://www.fastly.com/pricing) and help with purchasing it, contact your customer success manager or email [sales@fastly.com](mailto:sales@fastly.com).