Latest AWS Lambda Articles

AWS Lambda is a serverless computing service that runs application code without requiring developers to provision or manage servers. You deploy a function, configure its runtime, memory, permissions, and event sources, and AWS executes the code when it is invoked. Lambda automatically manages the un

AWS Lambda execution lifecycle explains what happens from the moment a Lambda function is invoked until the function finishes and the execution environment is either reused or removed. Understanding this lifecycle helps explain cold starts , warm starts , global variable reuse , SDK client reuse , d

AWS Lambda cold starts are one of the most discussed topics in serverless architecture. A cold start happens when AWS Lambda needs to create a new execution environment before running your function. This extra initialization time can increase latency, especially for user-facing APIs.

AWS Lambda concurrency is one of the most important concepts to understand before running serverless applications in production. Lambda can scale quickly, but that does not mean every downstream system can handle unlimited parallel requests.

AWS Lambda is easy to start with, but production Lambda systems require more than writing a handler function. You need to think about idempotency , retries , timeouts , IAM permissions , database connections , observability , deployment strategy , and downstream limits .

AWS Lambda performance optimization is not only about cold starts. A slow Lambda function can be caused by heavy dependencies, poor memory configuration, slow network calls, database connection problems, inefficient batch settings, or downstream systems that cannot handle Lambda concurrency.

AWS Lambda is event-driven by design. A Lambda function usually does not run by itself. It runs because something invokes it: an HTTP request, uploaded file, queue message, database stream record, schedule, or event from another AWS service.

AWS Lambda is often introduced as a simple way to run code without managing servers. But in real production systems, Lambda is rarely used alone. It usually becomes part of a larger architecture with API Gateway , SQS , SNS , EventBridge , DynamoDB , S3 , Step Functions , and other AWS services.

AWS Lambda is a serverless compute service that allows you to run code without creating or managing servers. Instead of provisioning EC2 instances, installing runtimes, configuring scaling rules, and patching operating systems, you write a function and configure when it should run.

AWS Lambda already provides horizontal concurrency by running more execution environments as request volume grows. But a single invocation can still spend most of its lifetime waiting for HTTP APIs, S3, DynamoDB, Redis, databases, or other network services.