Set maximum concurrent requests per instance

Console

1. In the Google Cloud console, go to Cloud Run:

   Go to Cloud Run

2. Select Services from the menu, and click Deploy container to configure a new service. If you are configuring an existing service, click the service, then click Edit and deploy new revision.

3. If you are configuring a new service, fill out the initial service settings page, then click Container(s), Volumes, Networking, Security to expand the service configuration page.

4. Click the Container tab.

   

   • Set the desired maximum concurrent requests per instance value in the text box Maximum requests per container.

5. Click Create or Deploy.

gcloud

To set maximum concurrent requests per instance, use the following command:

gcloud run services update SERVICE --concurrency CONCURRENCY

Replace the following:

• SERVICE: the name of your service.

• CONCURRENCY: the maximum number of concurrent requests per instance. For example, the following sets a maximum of 1 concurrent requests:

  gcloud run services update SERVICE --concurrency 1

Changing the maximum concurrent requests per instance of a given service will capture this setting in a new revision.

To revert to the default maximum concurrent requests per instance (80), use the command

gcloud run services update SERVICE --concurrency default

Replace SERVICE with the name of the service you are configuring.

YAML

1. If you are creating a new service, skip this step. If you are updating an existing service, download its YAML configuration:

   gcloud run services describe SERVICE --format export > service.yaml

2. Update the containerConcurrency attribute:

   apiVersion: serving.knative.dev/v1
   kind: Service
   metadata:
     name: SERVICE
   spec:
     template:
       metadata:
         name: REVISION
       spec:
         containerConcurrency: CONCURRENCY

   Replace the following:

   • SERVICE: the name of your Cloud Run service
   • IMAGE_URL: a reference to the container image, for example, us-docker.pkg.dev/cloudrun/container/hello:latest. If you use Artifact Registry, the repository REPO_NAME must already be created. The URL follows the format of LOCATION-docker.pkg.dev/PROJECT_ID/REPO_NAME/PATH:TAG .
   • CONCURRENCY: the maximum number of concurrent requests per instance.
   • REVISION with a new revision name or delete it (if present). If you supply a new revision name, it must meet the following criteria:
     • Starts with SERVICE-
     • Contains only lowercase letters, numbers and -
     • Does not end with a -
     • Does not exceed 63 characters

3. Create or update the service using the following command:

   gcloud run services replace service.yaml

Terraform

To learn how to apply or remove a Terraform configuration, see Basic Terraform commands.

resource "google_cloud_run_v2_service" "default" {
  name     = "cloudrun-service-concurrency"
  location = "us-central1"

  deletion_protection = false # set to "true" in production

  template {
    containers {
      image = "us-docker.pkg.dev/cloudrun/container/hello"
    }
    # Maximum concurrent requests
    max_instance_request_concurrency = 80
  }
}

Replace 80 with your desired maximum number of concurrent requests.

Console

1. In the Google Cloud console, go to Cloud Run:

   Go to Cloud Run

2. Click the service you are interested in to open the Service details page.

3. Click the Revisions tab.

4. In the details panel at the right, the concurrency setting is listed under the Container tab.

gcloud

1. Use the following command:

   gcloud run services describe SERVICE

2. Locate the concurrency setting in the returned configuration.