Question about retention policy

[xdxxxdx]

According to : https://informatievlaanderen.github.io/VSDS-LDESServer4J/configuration/retention-policies/index

To reduce storage fill up, it is possible to set a retention policy per view. A retention policy has to be added together with its view.

Retention policy is supposed to be configured per view?
In VSDS, we also can configure an overall retention which doesn't specific to any view right? (Also apply to all views?)

Also why:

tree:pageSize "100"^^http://www.w3.org/2001/XMLSchema#int ;
is needed here?
Thanks

[xdxxxdx]

With the configuration shown on the screenshot. a pagination view will be created also retention policy will be only applied on that view.