Four subsystems of system tuning
Four major subsystems of system tuning:
1. View the processes that use cpu the most in the system, top- > p
Ps-aux-- sort-pcpu | more
2. Find out the process top- > m that uses the most memory in the system.
Ps-aux-- sort-rss | more
3. Find the processes iostat and iotop that read and write the most to the disk.
Iostat-d-k-p / dev/sda
Iotop-o-d 2
4. Find the processes nload and nethogs that use the network most in the system.
