A 911-adjacent callback API on Lambda must keep consistently low latency; the agency accepts paying for idle warm capacity. Which setting addresses cold starts?
Select an answer to reveal the explanation.
Short Explanation
When every millisecond on a callback API matters and idle cost is OK, provisioned concurrency keeps engines warm—like firefighters sleeping at the station. Zero reserved concurrency is the opposite of low latency.
Full Explanation
Provisioned concurrency pre-initializes a specified number of Lambda execution environments, reducing cold-start latency for latency-sensitive APIs when the cost is acceptable. Setting reserved concurrency to zero causes throttling; removing memory or disabling the role breaks the function.