MarsSeed [1] filed a deletion request for wmmemload [2]: Defunct package from 2016. Even upstream's last release, 0.1.8 from 2015 fails to show its X window (it remains hidden).
There are other system resource monitor WindowMaker dockapps on AUR that still work. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/wmmemload/
