A Java service needs about four minutes to reach full throughput after launch because its caches and JIT compiler warm up. Each new instance should receive a growing share of requests once it passes health checks. Which target group setting does this?
Show answer and explanation
Answer: D
Slow start mode on an Application Load Balancer target group sends a linearly increasing share of requests to a newly registered healthy target over a configured duration of up to 900 seconds. That gives the JVM time to warm up before it takes a full load. Setting the duration to cover the typical warm-up time avoids overloading cold instances.
Why the other options are wrong
- A. Cross-zone balancing spreads requests across availability zones, but it does not limit how much traffic a newly registered target receives.
- B. Deregistration delay controls how long a draining target finishes existing requests when it leaves the group. It does not govern how a new target ramps in.
- C. Stickiness keeps a client on the same target. It does not ramp new targets gradually and can send a whole client's traffic to a cold instance.