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スワップ領域がないときにスワップできるようにする

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今は21世紀なのでswap領域とか誰も意識していないと思うのですが、世の中にはswapする必要のある構成のアプリケーションというのもあります。
しかし先程も書いたように、今は21世紀なので仮想環境などswap領域がそもそも存在しないということも多いです。

どうしてもswapしないと死んでしまう!みたいな時はswapする領域を作ってあげます。

ここに全部書いてあるのでこれ通りやります。

sudo fallocate -l 512m /mnt/512MiB.swap
sudo chmod 600 /mnt/512MiB.swap
sudo mkswap /mnt/512MiB.swap
sudo swapon /mnt/512MiB.swap

echo "\n/mnt/512MiB.swap  none  swap  sw  0 0" >> /etc/fstab

それとswap領域はメモリの倍くらいあった方がよいと言われてきましたが、今は21世紀なので、作るとしてもそんなにいらないと思います。

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