Take advantage of environment reuse, and check that

background processes have completed.

▪ Manage database connection pooling with a database

proxy. Persist state data externally.

▪ Configure Function with Resource-based policy. Resourcebased policy grants permissions to invoke your lambda

function. Execution role defines a function's permission to

interact with resources.

▪ Use Environment variables to store secrets securely and

adjust your function's behavior without updating code. An

environment variable is a pair of strings that are stored in a

function's version-specific configuration. 

https://docs.aws.amazon.com/lambda/latest/dg/best-practices.html