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Linux下Swap空间的添加
环境:CentOS 6.2
author: youseesan
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mkdir /var/swap www.zhishiwu.com
---创建指定大小的文件file.swp 1024字节 65536/1024=64M
[root@localhost ~]# dd if=/dev/zero of=/var/swap/file.swp bs=1024 count=65536
记录了65536+0 的读入
记录了65536+0 的写出
67108864字节(67 MB)已复制,1.05399 秒,63.7 MB/秒
[root@localhost ~]#
----UUID=7b2d46b8-6448-43d5-86e0-fffa0c798965作为卷标
[root@localhost ~]# mkswap /var/swap/file.swp
mkswap: /var/swap/file.swp: warning: don't erase bootbits sectors
on whole disk. Use -f to force.
Setting up swapspace version 1, size = 65532 KiB
no label, UUID=7b2d46b8-6448-43d5-86e0-fffa0c798965
vi /etc/fstab --添加下面一行,系统启动后自动加载
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/var/swap/file.swp swap swap defaults 0 0
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www.zhishiwu.com
[root@localhost ~]# free -m
total used free shared buffers cached
Mem: 1266 364 901 0 17 181
-/+ buffers/cache: 165 1100
Swap: 2918 0 2918
[root@localhost ~]#
---开启swap添加
[root@localhost ~]# swapon /var/swap/file.swp
[root@localhost ~]# free -m
total used free shared buffers cached
Mem: 1266 364 901 0 17 181
-/+ buffers/cache: 165 1100
Swap: 2982 0 2982
[root@localhost ~]#
www.zhishiwu.com
---关闭swap添加
[root@localhost ~]# swapoff /var/swap/file.swp
[root@localhost ~]# free -m
total used free shared buffers cached
Mem: 1266 364 901 0 17 181
-/+ buffers/cache: 165 1100
Swap: 2918 0 2918
[root@localhost ~]#