# du -xk /var | sort -rn | head
3275272 /var
2636128 /var/lib
2397752 /var/lib/mysql
661296 /var/lib/mysql/mailscanner
392272 /var/cache
389948 /var/cache/yum
206464 /var/lib/mysql/barts
188688 /var/cache/yum/base
142044 /var/lib/mysql/timmartin
136196 /var/cache/yum/update