I mean it.

Read them.

Death by squirt.

I maintain a server for research use with 16GB of RAM.

If any process uses up more than 90% of that, in most cases, better to kill the process than to let it go to swap.

If swap actually needs to be used, chances are that there is a huge memory leak that is out of control and the system will end up thrashing.

As a result of past experience, I believe in such situations, better to set memory limits, and disable swap completely. The system itself will run on a few hundred megs, keep that reserved, all the other memory is up for grabs by research processes, anything more than that will bring the system to a crawl anyway, so may as well stop the process than the entire system by not using swap altogether.