2 cores and 4GB RAM should have no problem handling thousands or tens of thousands of concurrent requests on the JVM. Lambda's documented concurrency maximum is

2 cores and 4GB RAM should have no problem handling thousands or tens of thousands of concurrent requests on the JVM. Lambda's documented concurrency maximum is "tens of thousands"[0], which means an 8GB m6g.large or ECS instance can probably handle larger bursts than lambda can. If you had extreme bursts, you'd also be having almost every request hit a cold start. [0] https://docs.aws.amazon.com/lambda/latest/dg/gettingstarted-limits.html https://docs.aws.amazon.com/lambda/latest/dg/gettingstarted-...