---
title: ratecounter.{NAME}.rate.10s
summary: null
url: >-
  https://www.fastly.com/documentation/reference/vcl/variables/rate-limiting/ratecounter-rate-10s
---

**Type:** FLOAT  
**Access:** read-only

**Available in:** all subroutines

Estimated per-second rate of change to the value of the most recently incremented entry in the named [`ratecounter`](https://www.fastly.com/documentation/reference/vcl/declarations/ratecounter/) across the [POP](https://www.fastly.com/documentation/guides/concepts/pop/) over the last 10 seconds.  This variable is computed asynchronously and may take up to a few seconds to reflect a change to the rate of increments.

Ratecounters can be incremented using the `ratelimit.check_rate`, `ratelimit.check_rates`, and `ratelimit.ratecounter_increment` functions.

For more information, see our [guide to rate limiting](https://www.fastly.com/documentation/guides/concepts/rate-limiting/).