---
title: RateWindow
summary: To be used for picking the window in a rate counter lookuprate or a ERL checkrate call.
url: https://www.fastly.com/documentation/reference/compute/sdks/cpp/fastly/erl/enum.RateWindow/
---

**Kind:** Enum  
**Module:** [erl](https://www.fastly.com/documentation/reference/compute/sdks/cpp/fastly/erl/)  
**Package:** compute-sdk-cpp 0.7.0  
**Source:** https://github.com/fastly/compute-sdk-cpp/blob/ff911e47be2f319e83a9cde960d2c3c5db534280/include/fastly/erl.h#L52

To be used for picking the window in a rate counter `lookup_rate` or a [ERL](https://www.fastly.com/documentation/reference/compute/sdks/cpp/fastly/erl/class.ERL/) `check_rate` call.

## Variants

### OneSec

**Value:** `= 1`

### TenSecs

**Value:** `= 10`

### SixtySecs

**Value:** `= 60`