Realized that -- due to weird behaviour[1] in the kernel -- I haven't
been using any swapspace for months. My machine has "only" 1GB RAM but
that's enough. In fact, I rarely use more than 512MB.
This makes me feel good. :-) For me, 512MB still feels like a lot of
memory but compared with modern PCs it's nothing. I heard that KDE may
use 1.1GB right after startup...
My setup (mainly awesome-wm[2]) uses about 90MB after startup. Firefox
is the "killer" application and bumps memory usage up to about 250MB.
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1.
https://bbs.archlinux.de/viewtopic.php?id=19598
2.
http://awesome.naquadah.org/