[userbinator]

In other words, you're advocating using more memory in a shared environment just so your server can (try to) be faster? What happens if everyone else does the same? Everyone ends up competing for the limited amount of memory, and no one wins.

"I'll grab all the memory I can so others can't use it" is a horrible way to think, as anyone who has attempted to simultaneously use multiple applications written with this mindset will know. One takes most of the memory, forcing other apps into swap, and then the opposite happens when you start working with one of the others, accompanied by massive swapping slowdowns.