On October 23, 2017 at 11:03:33 AM, Alessandra Forti (alessandra.forti@xxxxxxx) wrote:
Well, I typically find that swap I/O impacts many aspects of machine performance, not just the job itself. But maybe you have dedicated swap or all-flash storage.
Much of early 20th century literature was about documenting lifeâs absurdity. The 21st century seems to be holding its own in this respect.
FWIW: I agree fully, Condor should set swap settings better than it does and I think they will soon. But everyone should understand clearly: the 1 and only 1 way to eliminate swap usage is to eliminate swap. As I understand it, the original cgroups implementation chose to regulate RAM and swap simultaneously because it was easier to get the kernel patches accepted.
V2 of the memory controller does regulate swap separately and will let you eliminate swap usage on a cgroup-by-cgroup basis. Thatâs probably a year or two away from being a part of RHEL, but itâs built-in to Fedora and Debian now.