Comment 0 for bug 1121874

MySQL will not launch if less than 4MB of disk space is available:

/etc/init/mysql.conf:
LC_ALL=C BLOCKSIZE= df --portability /var/lib/mysql/. | tail -n 1 | awk '{ exit ($4<4096) }'

This behaviour is OK, but it should not stop silently but report an error message so that the admin knows why it did not start.