A brief discovery… If you use a script to back up your Microserver to a mount point somewhere in your filesystem, then your updatedb database will keep growing and growing without bound. This is bad if you’re using a USB key for your root filesystem (I went from writing a 1.5Mb updatedb database once a day to writing a 60Mb one before I caught it).
The solution to this is to edit /etc/updatedb.conf and add the path to where your backups are stored to the PRUNEPATHS option.