On a device with 2GB storage every MB is counted.
I wonder what is this /var/lib/ureadahead/debugfs doing on my system and is there a way to avoid its existence.
Note this mount point eats up 1.2 GB
# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 1.8G 1.2G 546M 68% /
none 995M 224K 995M 1% /dev
none 1000M 0 1000M 0% /dev/shm
none 1000M 136K 1000M 1% /var/run
none 1000M 0 1000M 0% /var/lock
none 1000M 0 1000M 0% /lib/init/rw
none 1.8G 1.2G 546M 68% /var/lib/ureadahead/debugfs
# cat /proc/self/mountinfo
15 19 0:0 / /sys rw,nosuid,nodev,noexec,relatime - sysfs none rw
16 19 0:3 / /proc rw,nosuid,nodev,noexec,relatime - proc none rw
17 19 0:5 / /dev rw,relatime - devtmpfs none rw,size=1018860k,nr_inodes=254715,mode=755
18 17 0:12 / /dev/pts rw,nosuid,noexec,relatime - devpts none rw,gid=5,mode=620,ptmxmode=000
19 1 8:1 / / rw,relatime - ext4 /dev/disk/by-uuid/68bf9687-2dec-49fd-a37d-5532c19f3a39 rw,errors=remount-ro,barrier=1,data=ordered
21 15 0:15 / /sys/fs/fuse/connections rw,relatime - fusectl none rw
22 15 0:7 / /sys/kernel/debug rw,relatime - debugfs none rw
23 15 0:10 / /sys/kernel/security rw,relatime - securityfs none rw
24 17 0:16 / /dev/shm rw,nosuid,nodev,relatime - tmpfs none rw
25 19 0:17 / /var/run rw,nosuid,relatime - tmpfs none rw,mode=755
26 19 0:18 / /var/lock rw,nosuid,nodev,noexec,relatime - tmpfs none rw
27 19 0:19 / /lib/init/rw rw,nosuid,relatime - tmpfs none rw,mode=755
# du -a /var | sort -n -r | head -n 10
138576 /var
87496 /var/lib
61164 /var/lib/apt
61120 /var/lib/apt/lists
34120 /var/cache
30668 /var/cache/apt
26108 /var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_lucid_universe_binary-amd64_Packages
18996 /var/lib/dpkg
16952 /var/lib/dpkg/info
15320 /var/cache/apt/srcpkgcache.bin
