There are actually quite a few resources for which I'd like to maintain something resembling steady-state saturation, like CPU and RAM utilization. However, it's when I've overcommitted those resources (e.g., for RAM, no more cache pages that can't simply be purged to make more room for RSS) that I start to see problems. (Of note, if I start paging in and out too much, that can also affect task switching, which leaves the kernel doing way more work, which itself can lead to a fun cascade of problems.)
There are actually quite a few resources for which I'd like to maintain something resembling steady-state saturation, like CPU and RAM utilization. However, it's when I've overcommitted those resources (e.g., for RAM, no more cache pages that can't simply be purged to make more room for RSS) that I start to see problems. (Of note, if I start paging in and out too much, that can also affect task switching, which leaves the kernel doing way more work, which itself can lead to a fun cascade of problems.)