Some times your machine may occupy loads of space under /var, Due to files created under /var/lib/mlocate directory.
If you have lots and lots of files on your machine, you may want to consider pruning some paths from the database. You can do this in /etc/updatedb.conf under PRUNEPATHS. You can also prune file systems (like nfs, if you so desire).
fuse.sshfs can be added to PRUNEFS in /etc/updatedb.conf. This should have exclueded sshfs lookups
cat /etc/updatedb.conf –> [entries in this file should be like this..]
PRUNEFS = “auto afs gfs gfs2 iso9660 sfs udf fuse.sshfs”
PRUNEPATHS = “/afs /media /net /sfs /tmp /udev /var/spool/cups /var/spool/squid /var/tmp”