Netbook, must save space on 4GiB SSD!

Question

I have an Asus Eee 901 with a 4GiB Master SSD, and I try as hard as I can to keep it as open as possible space-wise.
I noticed earlier that /var/cache/pacman/pkg was at more than a half a gig in size!
I ran pacman -Scc to clear it all out, because my netbook appears to be quite stable at the moment and I don't fiddle with critical files and such.
Have I made some horrible, terrible mistake?
Are there any other things I can do to save space on my little drive? (though at the time the largest directories are /lib and /usr).

Answer 1

Mecharuva wrote:Duly noted, karol. I opened GTKPacman to check out descriptions of all these things, and they're all labeled "Installed as a dependency for another package."
Pacman lists them as orphans, so then the package they depended on has already been removed, unless pacman is reporting the status of these packages erroneously? Could that be a possibility?
I don't want to break my system somehow by removing them.
Of course I could create a list somewhere and then reinstall them if I run into issues, no?
Skanky, I had tried putting /usr on my second hard drive once before, on another distro long ago, but I noticed some terribly sluggish performance, even for that distro. I was told it's because the slave SSD in the Eee 901 is not nearly as fast as the master.
I like fast, so I think I'll leave /usr on the master. I don't know if I'll compress it. That's a good amount of space, jakobm, but I don't want to put more on the CPU than there is already.
Those packages were needed by some other package, not the other way round.
A is a dependency for B. You first install A, then B. You first remove ('pacman -R') B, then A. You don't have to remove A, and if you run 'pacman -R B' only B will be removed, A will be left with the description that it was installed as a dependency for another package. If you 'pacman -Rs B' and A is not needed by other packages, both B and A will be removed.