Posts by Yan Cui

Shine Some Light on Your SNS to SQS to Lambda Stack
The combination of SNS to SQS to Lambda is a common sight in serverless applications on AWS. Perhaps triggered by...
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Seven Tools to Help You Become a Better Serverless Developer
Serverless technologies let us do more with less effort, time and energy. They let us focus on creating user value...
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AWS Lambda: function URL is live!
AWS announced the release of the Lambda Function URLs feature today. In this post, I describe what it is, how...
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Welcome to 10GB of tmp storage with Lambda
Every Lambda function comes with 512MB of ephemeral storage in the shape of a /tmp directory. This storage space can...
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Serverless Observability: It's easier than you think!
Observability is a measure of how well the internal state of a system can be inferred from its external outputs....
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Graviton-Based Lambda Functions, What It Means For You
AWS just announced support for AWS Lambda functions powered by AWS Graviton2 processors. These are 64-bit Arm-based processors that are...
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Automating Serverless Tasks with the Lumigo CLI
Here at Lumigo, our mission is to help customers succeed with serverless by solving the observability problem and letting them...
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How to monitor and debug AppSync APIs
AWS AppSync is a fully managed GraphQL service that makes it easy for you to build scalable and performant GraphQL...
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Package your Lambda function as a container image
Today, AWS announced another major feature to the Lambda platform: the option to package your code and dependencies as container...
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Lambda Logs API: a new way to process Lambda logs in real-time
AWS released Lambda Extensions just over a month ago, and we explained what they are and why they matter. Today,...
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AWS Lambda Extensions: What are they and why do they matter
There is a growing ecosystem of vendors that are helping AWS customers gain better observability into their serverless applications. All...
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AWS Lambda Cold Starts: Solving the Problem
What are Lambda Cold Starts? Cold starts can be a killer to Lambda performance, especially if you’re developing a customer-facing...
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How to Debug Slow Lambda Response Times
When you build your application on top of Lambda, AWS automatically scales the number of “workers” (think containers) running your...
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What alerts should you have for serverless applications?
A key metric for measuring how well you handle system outages is the Mean Time To Recovery or MTTR. It’s...
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Debugging AWS Lambda Timeouts
Some time ago, an ex-colleague of mine at DAZN received an alert through PagerDuty. There was a spike in error...
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How to Debug AWS Lambda Performance Issues
Ten years ago, Amazon found that every 100ms of latency would cost them roughly 1% in sales. This is a...
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Unlocking new serverless use cases with EFS and Lambda
UPDATE 21/06/2020: following the official launch of this feature, we have performed more thorough performance testing to see how mounting...
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A time machine for your env variables
One of the great things about Lumigo is that it records a lot of context about each Lambda invocation. This...
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HTTP API goes GA today!
As you read this, API Gateway HTTP API is now Generally Available. This is an important milestone, and kudos to...
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5 reasons why you should use EventBridge instead of SNS
Top 5 reasons to use EventBridge instead of SNS SNS and SQS have been the goto options for AWS developers...
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