App Engine Basic Scaling

[Andrew Hoy]

Hi all,

I have a query regarding max_instances when using basic scaling in the App Engine Standard environment (Node.js). Im my app.yaml file, I set max_instances to 1. This appears in the config section under App Engine > Versions in this UI:

runtime: nodejs8

env: standard

instance_class: B4_1G

handlers:

  - url: '.*'

    script: auto

basic_scaling:

  idle_timeout: 600s

  max_instances: 1

network: {}

All of the above looks correct. However, when I add the 'Max Instances' column, the value is set to 'auto' (see attachment). Can someone please let me know what I'm doing wrong here? Why is the UI showing 'auto' even though the config section shows max_instances set to 1?

Thanks,

Andy

[Omair (Cloud Platform Support)]

Hi Andrew,

You are using basic scaling which is different from manual scaling. In basic scaling instances are created on demand to handle request and automatically turned down when idle. The maximum number of instances that can be created is defined in the max_instances parameter. To read about types of scaling available in App Engine Standard please visit the link on [1]. Having said that, it does seem like a bug to me that the maximum instances is showing as auto. You can report this on  Issue Tracker as a bug.

[1]https://cloud.google.com/appengine/docs/standard/python/how-instances-are-managed#instance_scaling

[Andrew Hoy]

Hey Omair,

Appreciate you getting back to me.

Great, this is exactly what I wanted to use basic scaling for - thanks for confirming. I Have reported the bug on the issue tracker.

[Amit (Google Cloud Support)]

Hello Andrew

Thank you for your clarification. If you have any other queries, please let us know.