OCP CoreDNS documentation on caching improved alignment for undestanding of the phrase caching.

4.x

Everytime  

Reading the documentation of OpenShift CoreDNS caching setting in the DNS operator is misleading Customers on what caching in that sense means.

Setting the DNS operator cache leads to misunderstood behavior.     

As documented in https://issues.redhat.com/browse/OCPBUGS-62919 by Engineering Management, following additional statement could be provided in our docs to clarify on the expected behavior of setting a DNS operator cache values in OpenShift

A user can shorten the TTL of the DNS record by setting a lower positive cache but they cannot increase the TTL on the DNS record by setting a higher positive cache. The maximum cache is the lower of the TTL of the DNS record or the positive cache.