Posts by Yan Cui
Yan Cui Nov 22 2024
You now have deeper insights into Lambda ESM with these new metrics
Lambda’s Event-Source Mapping (ESM) has been a game-changer for Lambda users. It gives users an easy and cost-efficient way to...
Yan Cui Oct 10 2024
Five Ways to Improve Serverless Performance
Serverless is an incredible paradigm, but performance tuning sometimes feels like a black box. You have no control over the...
Yan Cui Jan 15 2024
Does Step Function's new TestState API make end-to-end tests obsolete?
Step Function added support for testing individual states [1] with the new TestState API [2]. Which lets you execute individual...
Yan Cui Dec 04 2023
re:Invent 2023 day 4 recap
Werner Vogel’s keynote is usually the highlight of re:Invent and 2023 is no different. Although there were no noteworthy service...
Yan Cui Nov 30 2023
re:Invent 2023 day 3 recap
AI-related announcements dominate once more. New models for Bedrock. Vector search everywhere, and DynamoDB does a bait-and-switch. Welcome to day...
Yan Cui Nov 29 2023
re:Invent 2023 day 2 recap
We had the opening keynote by Adam Selipsky. If you missed the live stream, you can watch it on YouTube...
Yan Cui Nov 28 2023
re:Invent 2023 day 1 recap
After the absolute barrage of announcements on day 0, day 1 brought us some mild excitement and one big disappointment…...
Yan Cui Nov 27 2023
re:Invent 2023 day 0 recap
In typical re:Invent fashion, AWS has made a series of big announcements before the main event even kicks off! Here...
Yan Cui Nov 26 2023
The best pre:invent serverless announcements you may have missed
It’s that time of the year again as re:Invent is almost upon us Here is a list of the serverless-related...
Yan Cui Sep 19 2023
Is Bun the Next Big Thing for AWS Lambda? A Thorough Investigation
It’s been only a few days since the Bun 1.0 announcement and it’s taken social media by storm! And rightly...
Yan Cui Aug 01 2023
Save money on Serverless: common costly mistakes and how to avoid them
When used properly, serverless technologies like AWS Lambda can lower the cost of running a system. This is because you...
Yan Cui Apr 07 2023
Return large objects with AWS Lambda’s new Streaming Response
Lambda has a size limit of 6MB on request and response payloads for synchronous invocations. This affects API functions and...
Yan Cui Nov 28 2022
AWS Lambda cold starts are about to get faster
Over the past few years, AWS has made incremental improvements to Lambda’s cold start performance. Nowadays, cold starts are much...
Yan Cui Nov 10 2022
AWS Lambda Telemetry API: a new way to process Lambda telemetry data in real-time
Back in 2020, we covered the launch of Lambda Extensions and the subsequent release of the Lambda Logs API. These...
Yan Cui Aug 18 2022
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...
Yan Cui Aug 11 2022
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...
Yan Cui Apr 06 2022
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...
Yan Cui Mar 24 2022
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...
Yan Cui Nov 11 2021
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....
Yan Cui Sep 29 2021
Graviton-Based Lambda Functions, What It Means For You
https://lumigo.io/learn/aws-lambda-cost-guide/AWS just announced support for AWS Lambda functions powered by AWS Graviton2 processors. These are 64-bit Arm-based processors that are...
Yan Cui Feb 15 2021
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...
Yan Cui Jan 18 2021
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...
Yan Cui Dec 01 2020
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...
Yan Cui Nov 12 2020
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,...
Yan Cui Oct 08 2020
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...
Yan Cui Sep 20 2020
What Causes AWS Lambda Cold Starts & 7 Ways to Solve Them
[inline_banner_by_id id=5428] What are Lambda Cold Starts? Cold starts can be a killer to Lambda performance. Lamba cold starts happen...
Yan Cui Sep 03 2020
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...
Yan Cui Aug 17 2020
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...
Yan Cui Aug 12 2020
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...
Yan Cui Jul 01 2020
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...
Yan Cui Jun 16 2020
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...
Yan Cui May 22 2020
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...
Yan Cui Mar 12 2020
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...
Yan Cui Mar 05 2020
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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