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Serverless AWS Lambda Development · 课时

无服务器定价与免费层级

了解 AWS Lambda 的计费方式以及哪些用量会计入成本，并了解慷慨的免费层级如何让您几乎无需花费就能构建和试验。

无服务器定价与免费层级 是 CoddyKit 上的免费 Serverless AWS Lambda Development 课时。 这是第 4 节课，共 4 节。 你可以在下方免费阅读本课时的完整内容 — 然后在浏览器中使用内置代码编辑器和全天候 AI 导师进行实践。 这是 Serverless AWS Lambda Development 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 Serverless AWS Lambda Development 课程共包含 4 节课。

本课时的部分内容尚未翻译，以英文显示。

Pay Only for What You Use

With serverless you pay per request and per compute time, never for idle servers. When nobody calls your function, you pay nothing.

The Two Cost Components

Lambda cost has two parts: Requests (a flat price per million invocations) and Duration (billed per millisecond, scaled by memory).

GB-Seconds Explained

Duration uses GB-seconds: memory in GB times run time in seconds. More memory or longer runs cost more. Here is a quick estimator.

def estimate_gb_seconds(memory_mb, duration_ms):
    memory_gb = memory_mb / 1024.0
    duration_s = duration_ms / 1000.0
    return memory_gb * duration_s

print(estimate_gb_seconds(512, 200))

The Free Tier

The Lambda free tier gives 1 million requests and 400,000 GB-seconds every month — and it never expires after 12 months.

A Tiny Function is Nearly Free

A 128 MB function running 100 ms can serve millions of requests inside the free tier, making Lambda perfect for hobby projects and prototypes.

Memory Affects Cost and Speed

More memory also adds CPU, so sometimes more memory finishes faster and lowers total GB-seconds and cost. Always test — never assume.

Idle Costs Nothing

Unlike an always-on EC2 box, a deployed Lambda nobody calls costs zero compute. You only pay to store the code.

Watch the Hidden Costs

Lambda is cheap, but it triggers paid services: API Gateway requests, CloudWatch Logs storage, and data transfer all add to the bill.

Estimate Before You Build

Use the AWS Pricing Calculator to model monthly cost from invocations, average duration, and memory. Estimating early avoids surprises.

Set Billing Alarms

Set a billing alarm in CloudWatch or AWS Budgets so you get notified the moment spending crosses a threshold you choose.

Compare to Servers

For spiky or low-volume work, serverless usually beats an idle server. For steady, very high constant load, a reserved server can be cheaper.

Quick Check

Check your billing understanding.

Recap

Recap: Lambda costs per-request plus GB-seconds, has a big always-on free tier, trades memory for speed, and rewards estimating and alarms.

常见问题解答

「无服务器定价与免费层级」课时是免费的吗？

是的 — 「无服务器定价与免费层级」的完整文本可在网页上免费阅读。要进行交互式练习（内置代码编辑器和全天候 AI 导师）并解锁 Serverless AWS Lambda Development 课程的其余内容，请升级到 CoddyKit PRO。 Serverless AWS Lambda Development 课程共包含 4 节课。

「无服务器定价与免费层级」这节课中我会学到什么？

了解 AWS Lambda 的计费方式以及哪些用量会计入成本，并了解慷慨的免费层级如何让您几乎无需花费就能构建和试验。 你通过在浏览器中直接运行的动手代码来练习 Serverless AWS Lambda Development，全天候 AI 导师会在你学习这节课的过程中回答你的问题。

学习 Serverless AWS Lambda Development 需要有经验吗？

无需任何先前经验。CoddyKit 上的 Serverless AWS Lambda Development 课程适合初学者到高级学习者，你可以从这里开始或从头开始，按照自己的节奏学习。 这是第 4 节课，共 4 节。

「无服务器定价与免费层级」课时需要多长时间？

大多数 CoddyKit 课程大约需要 5–10 分钟。每节课都很精短且互动，所以你能稳步进步，并在网页和应用中从离开的地方继续。

我能在这节 Serverless AWS Lambda Development 课中编写并运行代码吗？

能。每节 Serverless AWS Lambda Development 课都包含内置代码编辑器，你可以在浏览器中直接编写并运行真实代码，并获得即时 AI 反馈 — 无需本地设置。

此课程中的所有课时

  1. 什么是无服务器计算
  2. AWS Lambda 入门
  3. 您的第一个 Lambda 函数
  4. 无服务器定价与免费层级
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