Lambda Idempotency: Prevent Duplicate Processing
Lambda functions, by design, are meant to be executed at least once, which means you can't just assume your function will run exactly one time.
Lambda Articles
47 articles
Lambda Invoke: Async vs Sync Invocation Patterns
Lambda Invoke: Async vs Sync Invocation Patterns — practical guide covering lambda setup, configuration, and troubleshooting with real-world examples.
Lambda Java 21: Upgrade from Java 11 Runtime
The Java 11 to Java 21 runtime upgrade for AWS Lambda isn't just about a newer JVM; it's a fundamental shift in how Lambda manages and executes your Jav.
Lambda + Kinesis: Process Stream Records in Batches
Lambda + Kinesis: Process Stream Records in Batches — practical guide covering lambda setup, configuration, and troubleshooting with real-world examples.
Lambda Layers: Share Dependencies Across Functions
Lambda Layers let you package dependencies separately from your function code, making your deployment packages smaller and your code easier to manage.
Lambda Local Testing: SAM and Docker Workflows
SAM and Docker can be a powerful combination for local Lambda testing, but getting them to play nice can feel like a dark art.
Lambda Payload Limits: Handle 6MB and 256KB Constraints
Lambda Payload Limits: Handle 6MB and 256KB Constraints — practical guide covering lambda setup, configuration, and troubleshooting with real-world exam...
Lambda Multi-Value Headers: Return Multiple Header Values
Lambda functions can return multiple values for the same HTTP header. Let's say you're building an API gateway endpoint that needs to set a Set-Cookie h.
Lambda Node.js Bundling: Minimize Package Size with esbuild
Lambda Node.js Bundling: Minimize Package Size with esbuild — Lambda functions using Node.js often balloon in size, making cold starts slow and deployme...
Lambda Power Tuning: Find Optimal Memory Configuration
Lambda functions don't just run code; they run it inside a specific amount of memory, and that memory allocation is the single most important lever for .
Lambda Provisioned Concurrency: Eliminate Cold Starts
Provisioned Concurrency for AWS Lambda isn't just about eliminating cold starts; it's a mechanism to guarantee a predictable execution environment, even.
Lambda Python Packaging: Bundle Dependencies Correctly
Lambda Python Packaging: Bundle Dependencies Correctly — practical guide covering lambda setup, configuration, and troubleshooting with real-world examp...
Fix Lambda Recursive Invocation Loop Errors
Your Lambda function is calling itself, and the system is trying to prevent infinite billing. Here are the common culprits and how to fix them:
Lambda Reserved Concurrency: Throttle Function Invocations
Lambda reserved concurrency is a feature that lets you guarantee a certain number of execution environments for a specific Lambda function.
Lambda Response Streaming: Stream Large Responses
Lambda Response Streaming lets you send back large payloads from your Lambda functions without hitting the 6MB API Gateway payload limit.
Lambda Runtime Migration: Upgrade Deprecated Runtimes
You're migrating a Lambda function and hit a wall because the runtime you're using is deprecated. This means the underlying operating system and languag.
Lambda S3 Trigger: Process Uploads Automatically
Lambda functions can react to S3 object creation events, allowing you to process files as soon as they're uploaded without constant polling.
Lambda Secret Rotation: Rotate RDS Passwords Automatically
Lambda secret rotation on RDS passwords is surprisingly complex because the AWS Secrets Manager system itself is designed to be a secure vault, not a dy.
Lambda SnapStart: Reduce Java Cold Starts to Milliseconds
Lambda SnapStart can make your Java functions start up in milliseconds, but it's not a magic bullet that just works out of the box.
Lambda + Step Functions: Orchestrate Complex Workflows
Lambda and Step Functions are a killer combo for building robust, serverless workflows, but most people think of them as just "calling one Lambda after .
Lambda Versions and Aliases: Manage Deployment Lifecycle
Lambda versions and aliases are how you manage different states of your Lambda functions over time, letting you deploy, test, and roll back code safely.
Lambda VPC: Configure Private Access Without Cold Start Penalty
Your Lambda functions, when placed inside a VPC, suddenly can't talk to the outside world directly. This problem is about giving them that access back, .
Lambda Warm-Up: Keep Functions Hot with CloudWatch Events
Lambda functions can become sluggish for the first request after a period of inactivity because the underlying execution environment needs to be initial.
Lambda X-Ray Tracing: Debug Distributed Invocations
AWS X-Ray lets you trace requests as they travel through your distributed applications, giving you a visual map of your system's performance and pinpoin.
Lambda + API Gateway: Build Serverless REST APIs
A serverless REST API built with AWS Lambda and API Gateway doesn't actually eliminate servers; it just moves the burden of managing them to AWS, allowi.
Lambda ARM vs x86: Graviton2 Performance Compared
AWS Lambda functions running on ARM Graviton2 processors can offer significantly better performance and cost-efficiency compared to their x86 counterpar.
Lambda Blue-Green Deployments: Zero-Downtime Releases
Lambda blue-green deployments allow you to release new versions of your Lambda functions with zero downtime by running the old and new versions concurre.
Lambda Canary Deploys: Route Traffic with Aliases
Lambda aliases are the secret sauce behind canary deployments, allowing you to gradually shift production traffic from one version of your Lambda functi.
Lambda Circuit Breaker: Handle Downstream Failures
A Lambda circuit breaker doesn't actually break anything; it's a pattern of gracefully degrading service when a dependency fails, preventing a cascading.
Lambda CloudWatch Insights: Query Logs at Scale
CloudWatch Logs Insights lets you query your logs interactively, but its real power is unleashed when you need to sift through terabytes of data generat.
Lambda Cold Starts: Cut Initialization Time to Under 100ms
Lambda cold starts are often a performance bottleneck, but you can shrink them to under 100ms by optimizing your function's initialization phase.
Lambda Concurrency: Reserved vs Provisioned Limits
Lambda's concurrency limits aren't just about how many functions can run at once; they're a surprisingly nuanced dance between immediate availability an.
Lambda Container Images: Deploy Up to 10GB Functions
Lambda container images let you package your function code and dependencies as a container image, allowing for much larger deployment packages.
Lambda Cost Calculator: Understand Invocation Pricing
Lambda's pricing isn't just about how many times your function runs; it's about how much time and memory you allocate for those runs, and it’s billed in.
Lambda Custom Runtime: Build Your Own Bootstrap
A Lambda custom runtime allows you to run code written in any language on AWS Lambda, bypassing the need to use a pre-built runtime provided by AWS.
Lambda Dead Letter Queue: Capture Failed Invocations
A Lambda Dead Letter Queue DLQ doesn't actually capture failed invocations; it's a destination for events that Lambda failed to deliver to their intende.
Lambda Destinations: Route Success and Failure Outputs
Lambda Destinations let you route your function's output to other AWS services, making it a powerful tool for building event-driven architectures.
Lambda + DynamoDB Streams: React to Table Changes
DynamoDB Streams are a way to capture every change to your DynamoDB table and send those changes as a sequence of events to a stream.
Lambda Secrets: Inject Config Without Hardcoding
Lambda functions often need sensitive configuration data, like API keys or database credentials. The conventional wisdom is to inject these as environme.
Lambda /tmp Storage: Expand Ephemeral Storage to 10GB
Lambda functions are getting a storage upgrade, and it's not just about more space. Here's a Lambda function running with 10GB of /tmp storage, writing .
Lambda SQS Event Source: Process Queues Automatically
Lambda functions can poll an SQS queue and process messages automatically, but only if you configure the event source mapping correctly.
Lambda Extensions: Add Datadog Monitoring Sidecar
Lambda Extensions are a way to inject custom code into your Lambda function's execution environment. They run alongside your function, can be invoked be.
Lambda Fan-Out: Parallel Processing with SNS and SQS
Lambda functions are often used for event-driven architectures, but sometimes a single event needs to trigger multiple Lambda functions.
Lambda Function URLs: Expose Functions Without API Gateway
Lambda Function URLs are a surprisingly simple way to expose your Lambda functions directly over HTTP without the overhead and complexity of API Gateway.
Lambda URL vs API Gateway: When to Use Which
Lambda URL vs API Gateway: When to Use Which — practical guide covering lambda setup, configuration, and troubleshooting with real-world examples.
Lambda Go Performance: Benchmark vs Python and Node.js
Lambda Go Performance: Benchmark vs Python and Node.js — Go's Lambda functions often outperform Python and Node.js due to a combination of lower cold st...
Lambda IAM Roles: Least-Privilege Execution Permissions
Lambda functions can't do anything without explicit permission. That's the core of least privilege for IAM roles, and it's a surprisingly powerful conce.