xfwm is XFCE’s window manager, and it’s eating almost 30% of the total system memory, so that’s the prime suspect (I’m not exactly sure how much it interacts with other apps, so it’s possible something else is forcing xfwm to use all that memory, but that is IMHO unlikely).

An ugly “fix” is to log out and log back in (yes, not much better than just rebooting), or you could try to somehow restart xfwm - running xfvm --replace in terminal might work.

Edit: there’s an issue on the Manjaro forums that might be related: https://forum.manjaro.org/t/xfwm4-memory-leak-since-4-20/173910/7

That was my deleted comment, but then I realized the article specifies they are Rome CPUs (Zen 2), while the 4000 series of EPYCs is based on Zen 4

deleted by creator