Revision garbage collection

Knative automatically cleans up inactive revisions as configured by the Operator. For more information, see the Operator settings.

You can configure a revision so that it is never garbage collected by adding the serving.knative.dev/no-gc: "true" annotation:

apiVersion: serving.knative.dev/v1
kind: Revision
metadata:
  annotations:
    serving.knative.dev/no-gc: "true"
spec:
...