I am not exactly sure why this was placed in "adv config" when this has one section and that is Resource limits; but then it is about Valero. We should reserve adv config for actual adv config the user has to do.

This is more of a resource/requirements topic; there are examples in other areas of the doc for this type of info. This is usually a requirements topic or something similar. We can discuss if you want.

Please place this accordingly the following content:

dr4hub-advanced-configuration
= Backup and restore advanced configuration

You can further configure backup and restore by viewing the following sections:

//this short description does not really match the header below and the header doesn't match the topic. It seems this is a whole topic about Velero?

resource-requests-and-limits
== Resource requests and limits customization

When Velero is initially installed, Velero pod is set to the default CPU and memory limits as defined in the following sample:

[source,yaml]

resources:
limits:
cpu: "1"
memory: 256Mi
requests:
cpu: 500m
memory: 128Mi

The limits from the previous sample work well with some scenarios, but might need to be updated when your cluster backs up a large number of resources. For instance, when back up is run on a hub cluster that manages 2000 clusters, then the Velero pod fails due to the out-of-memory error (OOM). The following configuration allows for the backup to complete for this scenario:

[source,yaml]

limits:
cpu: "2"
memory: 1Gi
requests:
cpu: 500m
memory: 256Mi

To update the limits and requests for the Velero pod resource, you need to update the `DataProtectionApplication` resource and insert the `resourceAllocation` template for the Velero pod. View the following sample:

[source,yaml]

apiVersion: oadp.openshift.io/v1alpha1
kind: DataProtectionApplication
metadata:
name: velero
namespace: open-cluster-management-backup
spec:
...
configuration:
...
velero:
podConfig:
resourceAllocations:
limits:
cpu: "2"
memory: 1Gi
requests:
cpu: 500m
memory: 256Mi

additional-resources-dr4hub-adv
== Additional resources

https://content-stage.docs.redhat.com/en/documentation/red_hat_advanced_cluster_management_for_kubernetes/2.15/html-single/business_continuity/index#dr4hub-advanced-configuration