Refresh or Remove by CP Code
The Fast Purge and Fast Purge API applications can remove or invalidate all objects with a given CP code. This is best used when all or almost all objects have been modified. If only some have been modified, you should not use the CP code so the cached object contents do not have to be re-fetched from the origin server. When you refresh by CP code, you need to be aware of the possibility of creating a spike in the load on your origin, as many concurrent requests come in for refreshed objects.