You use a Lambda function to connect to an Oracle RDS instance and run some long SQL queries. The timeout of the Lambda function is set to 15 minutes, and the function sometimes reaches a timeout. You propose to increase the allocated memory of the Lambda function. However, your manager is worried about the cost. How would you answer this question?

Answer options:

A.The cost will not change as the allocated memory does not impact the price.
B.The cost will decrease for sure as the total duration of code execution will be less.
C.The cost may not increase as the execution time for the Lambda may be less although you will be charged more for the memory.
D.The cost will not change because the number of requests for the function does not change.

Correct Answer – C
Option A is incorrect: Because the amount of allocated memory impacts the cost.
Option B is incorrect: Because the price also depends on the amount of memory that you allocate to the function.
Option C is CORRECT: Because the price of duration is calculated based on both the amount of memory and execution time. When the function has more memory, the execution time may drop.
Option D is incorrect: Because the memory also impacts the cost of the function.
Reference:
https://aws.amazon.com/lambda/pricing/