""Recently I've began noticing that the amount of free memory
(as seen by the command "free" or "free -m") is always decreasing,
but never goes under a 100M.... Now, funny thing is, when I copy a
large file (2GB) and 'sudo vi' it, the system starts responding
slowly (as expected), the process uses a lot of memory (as
expected) and sometimes even swap is used (as expected). But when I
then terminate the vi-session, I "gain" free memory: where I used
to have 100MB free left, I now have 2GB again.""