Ubuntu / Linux Tuning

• http://linuxpoison.blogspot.cz/2011/01/easy-steps-to-tune-up-your-ubuntu.html
• http://hashprompt.blogspot.cz/2013/03/ubuntu-performance-tuning.html

Dropping Caches

sync ; echo 3 > /proc/sys/vm/drop_caches
sync ; echo 0 > /proc/sys/vm/drop_caches

Swap

Swappiness

cat /proc/sys/vm/swappiness
/etc/sysctl.conf
  vm.swappiness = 10

# Without reboot
sysctl vm.swappiness=10
swapoff -a
swapon -a

• http://askubuntu.com/questions/277021/why-is-swappiness-10-recommended
• http://askubuntu.com/questions/103915/how-do-i-configure-swappiness