# Zram

Because a Linux system requires swap to function properly install `zram-init`. To keep it simple, it will utilise RAM to store compressed swap.

Install it with:

```
# apk add zram-init
# rc-update add zram-init default
```

`zram-init` can be configured in `/etc/conf.d/zram-init`. The amount of devices and the size of zram can be changed here, for example:

```
num_devices=1

# swap - 500M

#size0=512
size0=`LC_ALL=C free -m | awk '/^mem:/{print int($2/4)}'`
```

Now the size of the swap device will be a fourth of the ram size. Reboot the computer or restart the service to check if it works.

Also be sure to read the [ArchWiki](https://wiki.archlinux.org/title/Zram) for more information.