The slave disk is 100% full.  I don't understand what's using the
space.  It's growing before my eyes, could Slony be filling up the
disk?

I get different reports from "du" and "df":


# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda3             117G  110G  1.3G  99% /
/dev/sda1              99M   24M   71M  26% /boot
tmpfs                 3.9G     0  3.9G   0% /dev/shm
]#


# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda3             117G  110G  512M 100% /
/dev/sda1              99M   24M   71M  26% /boot
tmpfs                 3.9G     0  3.9G   0% /dev/shm
# du -sh /
20G     /
#