AWS Lambda 的 Provisioned Concurrency

AWS Lambda 推出了 Provisioned Concurrency,降低冷啟動所需要的時間以確保效率:「 New – Provisioned Concurrency for Lambda Functions 」。

看 benchmark 的資料就很清楚,可以避免冷啟動所產生的延遲:

這邊也可以看出來就算是冷啟動,大約也是多個一秒多。如果這個延遲是需要被處理的,就可以考慮用 Provisioned Concurrency 了。

價位上是依照保留的量:

You only pay for the amount of concurrency that you configure and for the period of time that you configure it. Pricing in US East (N. Virginia) is $0.015 per GB-hour for Provisioned Concurrency and $0.035 per GB-hour for Duration. The number of requests is charged at the same rate as normal functions. You can find more information in the Lambda pricing page.

不過如果量再更大,而且考慮成本,應該會考慮改回傳統的架構,用多台 EC2 instance 跑...

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