The feed end point cannot be cleared by normal events as it is an aggregate of several items with many pages.
While it is possible to architect it in a way to achieve this, in reality it is much easier to just expire the feed more frequently to catch any updates. This is the current strategy.
Currently the TTL is 1 hour. This means that vandalism could persist for up to an hour in the feed *after it is fixed*. This is quite a long time.
In order to ensure vandalism is removed timely, we want to lower the TTL to something more frequent. 10 minutes seems like a reasonable time. Is this something that is possible technically without burdening the servers too much?