So I've been trying to track down some performance problems that I've hit lately - I used to be able to play C:S without any issues at all on Fedora 26 Beta - but now, things aren't so good - and it all seems to hinge on memory usage.I dual boot Windows 10 for good old GTA V - so I thought I'd install C:S on that partition to test.Now keep in mind that these installations are configured exactly the same. The same assets, the same mods enabled, on the same hardware, with the same CPU / GPU / RAM amount.Yet on Linux, *all* the system RAM is allocated - including swap file if it is available - whereas in Windows, we use less than half the available RAM with ZERO pagefile / swapping.Pinging @co_emmi for comment as well.Memory usage on Windows 10:Note the 11.3Gb Committed - but only 6.2Gb in use. In essence, about half my RAM is used by Cities: Skylines, the rest by Windows 10. That's ok - easy to live with.Reboot into Fedora 26 and fire up - firstly with swap disabled:Then with swap enabled (it grabs more RAM again!)Then as soon as I exit C:S, all RAM is released: