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Snailclimb merged 1 commit into from
Jan 25, 2022
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Update limit-request.md #1506

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2 changes: 1 addition & 1 deletion docs/high-availability/limit-request.md
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滑动窗口计数器算法相比于固定窗口计数器算法的优化在于：**它把时间以一定比例分片** 。

例如我们的借口限流每分钟处理 60 个请求，我们可以把 1 分钟分为 60 个窗口。每隔 1 秒移动一次，每个窗口一秒只能处理 不大于 `60(请求数)/60（窗口数）` 的请求， 如果当前窗口的请求计数总和超过了限制的数量的话就不再处理其他请求。
例如我们的接口限流每分钟处理 60 个请求，我们可以把 1 分钟分为 60 个窗口。每隔 1 秒移动一次，每个窗口一秒只能处理 不大于 `60(请求数)/60（窗口数）` 的请求， 如果当前窗口的请求计数总和超过了限制的数量的话就不再处理其他请求。

很显然， **当滑动窗口的格子划分的越多，滑动窗口的滚动就越平滑，限流的统计就会越精确。**

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