Containers limitations

Published on 12 October 2021

This section contains usage limits that apply when using Serverless Containers.

Resources	Criteria	Limits	Scope
Namespaces	Max Number	100*	Project
Containers	Max Number	1000*	Organization
Total container memory**	Max Size	600 GiB	Organization
Image size compressed	Max size	250 MiB	Container
Image size uncompressed	Max size	1 GiB	Container
Temporary disk size	Max size	512 MiB	Container
Invocation rate	Max Number	1000 per second	Container
Concurrency	Max	80	Container Instance
Scale (simultaneous Container Instances)	Max	20	Container
Environment Variables	Max Number	100	Container + Namespace
Environment Variables	Max Size	1000 chars	Environment Variable
Secret Environment Variables	Max Number	100	Container + Namespace
Secret Environment Variables	Max Size	65536 bytes	Secret Environment Variable
Time before scale to zero	Time	15 minutes	Instance
Time before scale down	Time	30 seconds	Instance
Timeout	Max	15 minutes	Request

* Lower limits may apply before account verification. Please contact our support team if you have any questions.

** Total container memory is the sum of the memory allocated to all your containers at their maximum Scale.

These limits are enforced as Account quotas.

Configuration Restrictions

In order to ensure the proper functioning of the product, we restrict the use of certain ports and environment variables

Blocked ports:
- 25: Due to potential abuse (spam), no outbound traffic is allowed through this port.
- 465: Due to potential abuse (spam), no outbound traffic is allowed through this port.
Unavailable custom ports Please don’t make your containers listen on these ports which are used by our service.
- 8008
- 8012
- 8013
- 8022
- 9090
- 9091
Reserved environment variables:
- PORT: Port on which your server should listen to default is 8080
- SCW_*: Reserved for product configuration (for example: token validation)