Jan. 8, 2020
8:28 p.m.
On Wed, Jan 08, 2020 at 03:08:42PM -0500, Jeffrey Walton wrote:
It looks like this is coming from the OpenVZ folks. They feel a swapfile would negatively impact performance, so it is disabled.
Yep, since this is not a full VM but rather a container, there is not much to do other than buying a bigger VPS.
(I'm not sure how a DoS is considered a good result, given an OOM kill just about always knocks out MySQL).
Swap in a way converts memory access into disk IO. And since a lot of disk IO can harm all services running on the host, for the operator it is safer to OOM kill one process and save all the others :) -- Valentin