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  • I suspect that's only possible if you make every user run in their own container. I think that wouldn't have any impact on performance, the difficulty would be the initial setup. Commented Mar 8, 2016 at 22:46
  • I'm not an expert, but I can ask people to help. With containers, will a lone user be able to use the whole machine? Are containers hard to set up? I was thinking of making OOM score adjustments according to user memory usage. Does that make sense? Commented Mar 9, 2016 at 9:24
  • I'm not an expert either. AFAIK the system keeps track of memory used by each container. You can set a limit per container, but you don't have to. The problem about “user memory usage” is that not only does Linux not keep track of it, but it isn't a well-defined notion, because memory can't be accounted per process: a lot of memory is used by multiple processes (in particular file cache). This is still true with containers but there is more separation so you get a more accurate picture (but not perfect). Commented Mar 9, 2016 at 10:22
  • The details aside, hard limits on memory isn't the solution here, since it would mean there are hard limits for users. I want users to have 50% when there are two users online and 100% if they are alone. This would be solved "naturally", by killing a processes from the greediest user, when memory runs out. Commented Mar 9, 2016 at 12:02