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#!/usr/bin/env bash
LC_ALL=C
name="/etc/sysctl.d/60-optimizaciones.conf"
memor=$(grep MemTotal /proc/meminfo | awk '{print $2}')
mb=$(( $memor * 1024 ))
mf=$(( $mb / 1024 * 0,01 ))
fm=$(( $mb / 4194304 * 256 ))
mo=$(( $mb * 0,10 / 65536 ))
mt=$(( $fm * 2 ))
ps=$(getconf PAGE_SIZE)
pp=$(getconf _PHYS_PAGES)
shmall=$(( $pp / 2 ))
shmmax=$(( $shmall * $ps ))
echo "kernel.shmmax = $shmmax" > $name
echo "kernel.shmall = $shmall" >> $name
echo "vm.min_free_kbytes = $mf" >> $name
echo "fs.file-max = $fm" >> $name
echo "net.ipv4.tcp_max_orphans = $mo" >> $name
echo "net.ipv4.tcp_max_tw_buckets = $mt" >> $name
if (( $memor < 1024000 )); then
echo "vm.dirty_ratio = 25" >> $name
echo "vm.dirty_background_ratio = 15" >> $name
echo "vm.dirty_expire_centisecs = 750" >> $name
echo "vm.dirty_writeback_centisecs = 125" >> $name
else
if (( $memor > 4096000 )); then
echo "vm.swappiness = 10" >> $name
echo "vm.vfs_cache_pressure = 50" >> $name
fi
if (( $memor < 8192000 )); then
echo "vm.dirty_ratio = 12" >> $name
echo "vm.dirty_background_ratio = 10" >> $name
echo "vm.dirty_expire_centisecs = 1500" >> $name
echo "vm.dirty_writeback_centisecs = 250" >> $name
else
echo "vm.dirty_ratio = 3" >> $name
echo "vm.dirty_background_ratio = 5" >> $name
echo "vm.dirty_expire_centisecs = 3000" >> $name
echo "vm.dirty_writeback_centisecs = 500" >> $name
fi
fi
sysctl -p > /dev/null
if (( $memor < 768000 )); then
if (( $memor < 512000 )); then
sed -i 's_Exec=default_Exec=/usr/bin/lxlauncher_g' /usr/share/xsessions/lightdm-xsession.desktop
else
sed -i 's_Exec=default_Exec=/usr/bin/openbox-session_g' /usr/share/xsessions/lightdm-xsession.desktop
fi
fi
if ! [[ -z $(lscpu | grep GenuineIntel) ]]; then
echo "INTEL_BATCH=1" > /etc/environment
fi
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