Aliyun ECS Linux Add or remove virtual memory swap

One, add swap

1. Use the following command to create a 1G swap space.

DD If=/dev/zero Of=/tmp/swap BS=1MB count=1024

2. Make a swap file

Mkswap/tmp/swap

3, start the swap partition.

Swapon/tmp/swap

4, this operation is only valid for the current, restart the server after the expiration. If you want to keep it going. You can edit the/etc/fstab file:

Vim/etc/fstab

and add the following, save to ensure that the added virtual memory swap is permanently in effect.

/tmp/swap Swap Defaults 0 0

Second, delete swap

If you no longer need virtual memory swap, delete the/tmp/swap swap defaults 0 0 content in the/etc/fstab file. and recycle the swap space.

Swapoff/tmp/swap
Rm/tmp/swap