When I asked why my managed VPS was configured with no swap, and that it please be configured I was told this by my VPS provider:

Its not possible to add swap partition on a VPS, and there is no need to create separate swap file. You can keep track of the memory usage in power panel under resource alerts. If the VPS is using up the memory allocated, you can see the alerts there.

I realize that it's "best" to never start swapping a lot, but my understanding was that if memory was low, some virtual memory would keep you going at least, to avoid services from crashing or worse.

Thoughts?