Time required for a container/revision to scale up from 0

RajivBansal-2486 266

Hi,

Azure container apps support scale down to 0 in both dedicated and consumption plan. I want to know what is the typical time required for scaling. I understand that it will depend upon factors like container startup time etc., but please give a indicative figure assuming that container startup time is just few milliseconds.

Thanks

Shireesha Eeraboina (Quadrant Resource LLC) 570 Reputation points Microsoft Vendor

2024-12-16T07:55:13.81+00:00

Hi @Rajiv Bansal ,

Thanks for reaching out to Microsoft Q&A.

I understand that you want to know more about scaling mechanism/ how scaling work in container apps.

There is no default value or preside time and to scale out or scale in the container apps.

Azure Container Apps manages automatic horizontal scaling through a set of declarative scaling rules. As a container app scales out, new instances of the container app are created on-demand.

You can refer to the default scale behavior in container apps: https://learn.microsoft.com/en-us/azure/container-apps/scale-app?pivots=azure-cli#scale-behavior

Hope this helps, do let me know if you have any further questions.
VenkateshDodda-MSFT 23,141 Reputation points Microsoft Employee

2024-12-17T06:48:22.3966667+00:00

@Rajiv Bansal Following up to see if you have a chance to check the previous response and helped. Do let us know if you have any further questions on this.
RajivBansal-2486 266 Reputation points

2024-12-17T12:50:33.0466667+00:00

@VenkateshDodda-MSFT : I understand that scale behavior of container apps can be controlled using configurations. I am designing an application and need to see if scale to 0 is an option or not. This will depend upon the time a request needs to wait for the app to scale up.

So, I need some tentative figure or range that is taken to for scaling in a typical application. This can be based on certain assumptions like container startup time is negligible etc.

Accepted answer

VenkateshDodda-MSFT 23,141 Reputation points Microsoft Employee

2024-12-18T05:31:46.12+00:00

@Rajiv Bansal Thanks for your follow-up questions on this.

Container Apps support scaling-in and scaling-out the replicas to 0 and from 0 to N number of replicas.

Regarding the time take to scale a new replica to run your application there is no idle/default/SLA time that has been shared by Container apps Product team as it depends on multiple factors as you have called it out.

Let me know if you have any further questions
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