SNS to Lambda vs SNS to SQS to Lambda

Question

I\'m trying to understand whether I need SQS in my workflow if someone can help explain. In my app, when an action is taken, it submits info to SNS topic which invokes LAMBDA to

Answer 1

SQS does not invoke Lambda. SQS cannot invoke anything. People using Lambda with SQS are running Lambda on an event timer, like once a minute, and every time the function runs it polls SQS to see if there is a message to process.

If you don't need to queue things up and prevent too many Lambda functions from running concurrently then you don't need a queue system like SQS.