mirror of https://github.com/helloxz/shell.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
52 lines
1.2 KiB
52 lines
1.2 KiB
#!/bin/bash |
|
##### 设置虚拟内存 ##### |
|
##### update：2020/12/22 ##### |
|
##### author:xiaoz<xiaoz93@outlook.com> |
|
|
|
#获取物理内存 |
|
p_mem=`free -m|grep Mem|awk '{print $2}'` |
|
#获取最佳虚拟内存大小 |
|
|
|
#内存如果小于2g，则设置2倍 |
|
if [ $p_mem -lt 2000 ] |
|
then |
|
swap_value=$p_mem*2 |
|
elif [ $p_mem -gt 2000 ] && [ $p_mem -lt 8000 ] |
|
#内存大于2G，小于8G，则设置和物理内存大小一致 |
|
then |
|
swap_value=$p_mem |
|
else |
|
#其他情况，比如大于8G，则设置8G内存 |
|
swap_value=8000 |
|
fi |
|
|
|
|
|
#设置swap函数 |
|
function set_swap(){ |
|
#创建swap |
|
dd if=/dev/zero of=/dev/swap bs=1M count=${swap_value} |
|
mkswap /dev/swap |
|
swapon /dev/swap |
|
#写入分区表 |
|
echo '/dev/swap swap swap defaults 0 0' >> /etc/fstab |
|
} |
|
|
|
#判断当前是否开启了虚拟内存 |
|
if swapon -s |
|
then |
|
echo '---------------------------------' |
|
echo 'You have already set up swap, there is no need to repeat the settings.' |
|
exit |
|
else |
|
#设置虚拟内存 |
|
set_swap |
|
echo '---------------------------------' |
|
echo 'Swap setup complete.' |
|
echo '---------------------------------' |
|
swapon -s |
|
echo '---------------------------------' |
|
free -mt |
|
echo '---------------------------------' |
|
fi |
|
|
|
exit |