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調整swap


Jack

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調整swap
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安裝LNMP前,先調整swap為4GB

 

瀏覽記憶體
free -m


Swap這一行的total為0,代表伺服器swap沒設置
Swap: 0


建立一個資料夾用於存放swap
mkdir /var/swapfile


調整swap為4GB (視情況而定)
dd if=/dev/zero of=/var/swapfile/file.swap bs=1024k count=4096


建立一個swap檔案
mkswap /var/swapfile/file.swap

 


修改swap資料夾權限

chmod 0600 /var/swapfile

chmod 0600 /var/swapfile/file.swap

 


到fstab檔案中新增開機自動掛載設定
vi /etc/fstab


就能開機啟用這個swap
在底部加入這一行
/var/swapfile/file.swap     swap    swap    defauls    0 0

 

ESC儲存並離開
:wq

 

啟用
swapon /var/swapfile/file.swap

 


重開機
reboot

 

確認swap是否已調整為4GB
free -m

 

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