Benefits

• Easy Pricing: • Pay per request and compute time
• Free tier of 1,000,000 AWS Lambda requests and 400,000 GBs of compute time
• Integrated with the whole AWS suite of services
• Integrated with many programming languages
• Easy monitoring through AWS CloudWatch
• Easy to get more resources per functions (up to 10GB of RAM!)
• Increasing RAM will also improve CPU and network.

Lambda with EventBridge

• use lambda with eventbridge rules to set up a serverless cron
• EventBridge has two types of rules:
  • Rules with event pattern
  • Schedule ( Cron )

Lambda with S3 Event Notifications

• use case: generate thumbnails of images uploaded to s3

Lambda Permissions

• IAM Roles
  • grant lambda function permission to AWS Services
• Resource-based Policies
  • Give other AWS Services permission to invoke lambda functions

Lambda Performance

• Any code that takes a lot of time to execute ( such as opening a db connection ) should be placed outside of your lambda function handler.