SQS messages to trigger same lambda function instances one to one

Question

I have a requirement where at a single point of time each SQS messages in the same SQS queue should trigger separate lambda instances

For Example the SQS queue has n number of messages at a given time then expectation is, it should trigger n instance of lambdas

Message_1 --> Lambda_function_A_instance_1
Message_2 --> Lambda_function_A_instance_2
Message_n --> Lambda_function_A_instance_n

Use case: Need to keep separate instance of lambda functions for each messages in order to process data files which are > 10G.. So each message will invoke new lamnda instance of the same function

Answer 1

To configure Lambda to read only one message from SQS at a time, you need to set the BatchSize parameter to 1 when creating the SQS event source mapping. This will ensure that only one message is read from the queue at a time.

Additionally, you can set the VisibilityTimeout parameter to a value that is greater than the Lambda function's timeout value to ensure that the message is not processed multiple times.