File regataos-zram.sh of Package regataos-games

Overview Repositories Revisions Requests Users Attributes Meta

File regataos-zram.sh of Package regataos-games

#!/bin/bash
#
# This script helps to decide the "vm.swappiness" value,
# according to the size of the RAM memory available in the hardware,
# so that the zRAM can have at least one block device compressed in the 1GB RAM.

# Set the value of the "vm.swappiness" option and configure zram rules
ram_size=$(free -g | grep Mem | awk '{print $2}')

if [ $ram_size -le 8 ]; then
    sysctl vm.page-cluster=0
    sysctl vm.dirty_ratio=10
    sysctl vm.dirty_background_ratio=6
    sysctl vm.vfs_cache_pressure=50
    sysctl vm.admin_reserve_kbytes=1048576
    sysctl vm.oom_kill_allocating_task=1
fi

if [ $ram_size -le 1 ]; then
    sysctl vm.swappiness=100
    /sbin/mkswap /dev/zram0 524288
    /sbin/swapon -p 100 /dev/zram0

elif [ $ram_size -le 2 ]; then
    sysctl vm.swappiness=80
    /sbin/mkswap /dev/zram0 1048576
    /sbin/swapon -p 100 /dev/zram0

elif [ $ram_size -le 4 ]; then
    sysctl vm.swappiness=60
    /sbin/mkswap /dev/zram0 1572864
    /sbin/swapon -p 100 /dev/zram0

elif [ $ram_size -le 5 ]; then
    sysctl vm.swappiness=60
    /sbin/mkswap /dev/zram0 2097152
    /sbin/swapon -p 100 /dev/zram0

elif [ $ram_size -le 8 ]; then
    sysctl vm.swappiness=20
    /sbin/mkswap /dev/zram0 4194304
    /sbin/swapon -p 100 /dev/zram0

elif [ $ram_size -le 12 ]; then
    sysctl vm.swappiness=20
    /sbin/mkswap /dev/zram0 4194304
    /sbin/swapon -p 100 /dev/zram0

else
    sysctl vm.swappiness=20
    /sbin/mkswap /dev/zram0 4194304
    /sbin/swapon -p 100 /dev/zram0
fi

# Configure ZSwap
function createSwapFile() {
	mkdir -p "/swap"
	truncate -s 0 /swap/swapfile

if [[ $(df -hT | grep ^/) == *"btrfs"* ]]; then
		chattr +C /swap/swapfile
	fi

fallocate -l 4G /swap/swapfile
	chmod 0600 /swap/swapfile
	mkswap /swap/swapfile
	/sbin/swapon -p 10 /swap/swapfile
}

if test -e "/swap/swapfile"; then
	/sbin/swapoff /swap/swapfile
	rm -f "/swap/swapfile"
	createSwapFile

elif test -e "/swapfile"; then
	/sbin/swapoff /swapfile
	rm -f "/swapfile"
	createSwapFile

else
	createSwapFile
fi

sudo systemctl daemon-reload

Places

File regataos-zram.sh of Package regataos-games

Places