我更改了6Gb表中字段的维度。结果，所有磁盘空间都结束了，进程没有完成。你能推荐我什么？
df -h
Filesystem Size Used Avail Use% Mounted on
/dev/xvda 24G 22G 0 100% /
tmpfs 998M 0 998M 0% /lib/init/rw
udev 10M 112K 9.9M 2% /dev
tmpfs 998M 0 998M 0% /dev/shm
top - 12:58:38 up 28 days, 6:27, 1 user, load average: 0.05, 0.06, 0.06
Tasks: 114 total, 2 running, 112 sleeping, 0 stopped, 0 zombie
Cpu(s): 1.8%us, 0.7%sy, 0.0%ni, 97.5%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 2042528k total, 1645508k used, 397020k free, 62012k buffers
Swap: 524284k total, 54236k used, 470048k free, 1041392k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
7854 www-data 20 0 231m 13m 7676 S 1 0.7 0:00.08 apache2
7755 www-data 20 0 230m 14m 9068 S 1 0.7 0:01.37 apache2
7815 www-data 20 0 230m 14m 7884 S 1 0.7 0:00.35 apache2
2192 mysql 20 0 720m 180m 532 S 0 9.0 533:53.48 mysqld