Tell the proxy "do not cache content" from a specific host

Is it possible to tell the MK web proxy (not parented) to not store content form a particular site in the cache?

http://www.mikrotik.com/testdocs/ros/3.0/pnp/proxy.php

Look up the “/ip proxy access” section

not ‘access’ but ‘cache’ =)

yes, thanks guys.
All good now.

How does the MK cache work in terms of when the allocated space fills…? is new data written over on a first in, first out basis?