SWAP分区
swap 大小参考:
Available RAM Swap Space Required
Between 1 GB and 2 GB 1.5 times the size of the RAM
Between 2 GB and 16 GB Equal to the size of the RAM
More than 16 GB 16 GB
#1.新增swap数据块
$ dd if=/dev/zero of=/opt/swap bs=1M count=16384
#2.格式化成swap分区
$ mkswap /opt/swap
#3.将权限修改为600
$ chmod 600 swap
#4.激活swap分区
$ swapon /opt/swap
#5.在fstab中增加一条记录如下
$ vim /etc/fstab
/opt/swap swap swap defaults 0 0
http://www.zhihu.com/question/19729450
/dev/xvdb1 /opt ext4 defaults 0 0
/opt/swap swap swap defaults 0 0
/dev/sda1 /opt ntfs defaults,user,rw,iocharset=utf8,umask=000,nls=utf8 0 0
/dev/sda2 /data ntfs defaults,user,rw,iocharset=utf8,umask=000,nls=utf8 0 0
/dev/sdb1 /win ntfs defaults,user,rw,iocharset=utf8,umask=000,nls=utf8 0 0
/dev/sdb2 /programe ntfs defaults,user,rw,iocharset=utf8,umask=000,nls=utf8 0 0
# fallocate -l 10G bigfile
# truncate -s 10G bigfile
# dd of=bigfile bs=1 seek=10G count=0