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Increasing a function's memory setting usually also

  • A.increases the processing power allocated to it
  • B.increases the maximum execution timeout
  • C.raises the account concurrency limit
  • D.reduces the per-millisecond price of execution

Answer: A

Correct answer: increases the processing power allocated to it

On the major platforms CPU is allocated in proportion to the memory setting, so raising memory raises processing power with it. That has a counter-intuitive consequence: a compute-bound function can be *cheaper* at a higher memory setting, because it finishes proportionally faster and the price is per gigabyte-second. The timeout and account concurrency limits are separate settings, and the unit price does not fall.

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