google-cloud-platformgoogle-app-enginegoogle-app-engine-go

Why does my flex env google app engine instance have a minimum of 2 instances running, even when there is no traffic?

I'm running a flex environment google app engine service, and I can't understand why it always shows 2 instances running, even when there is no traffic. The flex environment I'm using is a distroless golang service.

I know with flex environments you can't set min instance properties. Now that I am getting traffic, I see the instance count is at 3, which makes me wonder, are two of these instances actually doing anything.

My CPU utilization runs at about 30%. Memory usage is 1.6 GB.

My yaml:

instance_class: F1

runtime: custom
env: flex

includes:
  - .env.yaml
Solution

  • You must include a scaling description in your app.yaml file to control the min instance value.

    By default, the min instance is set to 2. Set it to one in your scaling config override.