Re: Adjusting "ShmMax" of kernel, a good idea?
Welcome to Ubuntu and the forums, mike_smith2
Accepting for the moment your need to install AV, it's your call whether you want to change basic system parameters in order to accommodate an app that isn't even needed in Linux. I have no idea whether this change will destabilize the OS. But if I were in your shoes, I would look to other products (clam or AVG) that presumably don't make such hairy demands before considering Avast.
Man, am I glad my AV days are over with.
Newb: How far must I jump to clear the ledge halfway down?
Guru: It's bad to jump off cliffs. Let's look at better options.
Newb: Stop harping about "best practices" and just let me jump.