See: Automatic restart proxy service if memory exceed an memory usage percentage
The more your users will constrain the proxy, the more your server memory will be consumed.
You will not be able to prevent the amount of memory needed until your proxy is confronted with real users.
It is therefore necessary to see the memory consumption of your proxy server in relation to the activity of your users.
On Artica v4.30 Service Pack 383, a memory usage graph has been added.
You see a graph that display your proxy service memory usage per hour,day,wee,month,year