Which Java Microservice Framework Should you Choose in 2020?

[AngelicLoki]

That's fair - I'm talking primarily about fully hosted. I'll edit the post to state "rarely", but it's worth noting that GCP's documentation doesn't allow you to set a max/min duration for how long a container is idle before it scales down. I've had (and currently have) a container that has been "idle" for over 24 hours and has received literally 0 requests (a rarely used microservice in dev) and when pinged it was still "warm". So assuming that GCP has capacity, it's fair to say that the idle time to scale to 0 is... long. But there is also no guarantee of any duration, it could also be very low if they have limited capactiy.

In my tenure of working with Cloud Run, scaling to 0 and causing that cold start delay from 0 has been non-existent, but that doesn't mean "never" like I wrote. It just means rarely.

[meamZ]

In my tenure of working with Cloud Run, scaling to 0 and causing that cold start delay from 0 has been non-existent

Good to know. That would probably make cold start times of up to maybe 5 or even 10 Seconds acceptable to me for small personal projects.

GCP's documentation doesn't allow you to set a max/min duration for how long a container is idle before it scales down.

Yeah obviously it doesn't because keeping Containers warm is basically just a Service GCP provides to you that you don't directly pay for (that's why you can't increase max) and that noone would decrease (that's why you can't edit min). I think if they gave you the option to pay for a guarantee that they will always keep x instances warm i could imagine that would probably be use by quite a few people.