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feat(serverless): add concurrency soft limit info MTA-7622 #7067

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feat(serverless): add concurrency soft limit info MTA-7622
Loic-kd Oct 30, 2026
26d9ece
feat(serverless): add ref to concurrency page
Loic-kd Oct 30, 2026
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Apply suggestion from @vanda-scw
Loic-kd Oct 30, 2026
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2 changes: 2 additions & 0 deletions pages/serverless-containers/reference-content/containers-concurrency.mdx
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Expand Up @@ -15,6 +15,8 @@ Unlike Serverless Functions, which handles only one request per instance, Server

A higher number of instances processing requests at the same time implies a greater usage of memory and [vCPU](/serverless-containers/concepts/#vcpu), and consequently a higher cost.

Concurrency is a soft limit used as an autoscaling target, not a strict per-instance cap. A container instance can temporarily process more concurrent requests than the configured value, especially during sudden bursts of traffic or when the maximum number of instances (`maxScale`) is reached.

```
Concurrency = 1

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20 changes: 11 additions & 9 deletions pages/serverless-containers/reference-content/containers-limitations.mdx
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Expand Up @@ -11,14 +11,14 @@ 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 |
| Namespaces | Max number | 100\* | Project |
| Containers | Max number | 1000\* | Organization |
| Total container memory\** | Max size | 600 GiB | Organization |
| Custom domains | Max number | 50 | Container |
| Recommended maximum uncompressed image size | Max size | 1 GB | Container |
| Temporary disk size | Max size | 24 000 MiB | Container |
| Invocation rate | Max number | 5000 per second | Container |
| Concurrency | Max | 80 | Container Instance |
| Concurrency\*** | Max | 80 | Container Instance |
| Max Scale (simultaneous Container instances) | Max | 200 | Container |
| CPU | Min/max | 70 to 6000 mvCPU | Container |
| Memory | Min/Max | 128 to 12228 MB | Container |
Expand All @@ -28,15 +28,17 @@ This section contains usage limits that apply when using Serverless Containers.
| 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 |
| HTTP request duration (timeout)\*** | Min/max | 10 seconds to 60 minutes | Request |
| HTTP request duration (timeout)\**** | Min/max | 10 seconds to 60 minutes | Request |
| Private Networks attached | Max | 1 | Container |
| Logs | Logs | 30000 per minute | Project |

\* Lower limits may apply before account verification. Contact our Support team if you have any questions.
\* Lower limits may apply before account verification. Contact [Scaleway Support](https://console.scaleway.com/support) if you have any questions.

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

\*** Use [Serverless Jobs](/serverless-jobs/) for tasks up to 24h.
\*** Maximum concurrency is a soft limit used as an autoscaling target, not a strict per-instance cap. See the [Containers concurrency](/serverless-containers/reference-content/containers-concurrency/) page for more information.

\**** Use [Serverless Jobs](/serverless-jobs/) for tasks up to 24h.

These limits are enforced as [Organization quotas](/organizations-and-projects/organization/organization-quotas/#serverless-containers).

Expand Down Expand Up @@ -227,11 +229,11 @@ Do not have your containers listen on these ports, as they are used by our servi

### Protocols

Serverless Containers support HTTP/1.1 and HTTP/2 connections. HTTP/1.0 is not supported. Refer to the [dedicated troubleshooting page](/serverless-containers/troubleshooting/http1-errors/) for more information on how to solve HTTP/1.0 issues.
Serverless Containers support HTTP/1.1 and HTTP/2 connections. HTTP/1.0 is not supported. See the [troubleshooting page on how to resolve HTTP/1.0 issues](/serverless-containers/troubleshooting/http1-errors/) for more information.

## Private Networks and Virtual Private Cloud (VPC)

Refer to the [dedicated documentation](/serverless-containers/reference-content/containers-private-networks/) on VPC and Serverless Containers integration for more information.
See the [Serverless Containers and Private Networks integration](/serverless-containers/reference-content/containers-private-networks/) page for more information.

## Default values for CPU and memory limits

Expand Down Expand Up @@ -275,4 +277,4 @@ leading to service disruption until a new successful deployment is made.

## Containers sandbox

Refer to the [dedicated documentation](/serverless-containers/reference-content/containers-sandbox/) for more information on the limitations of sandbox environments for Serverless Containers.
See the [Containers sandbox](/serverless-containers/reference-content/containers-sandbox/) page for more information on the limitations of sandbox environments for Serverless Containers.
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