Tune System Performance

Question 1

What is the command to see which tuned profile is active?

Answer 1

tuned-adm active

Question 2

What is the command to list available tuned profiles?

Answer 2

tuned-adm list

Question 3

What is the command to change the desired tuned profile?

Answer 3

tuned-adm profile profile-name

Question 4

What is the command to change to the recommended tuned profile?

Answer 4

tuned-adm recommend

Question 5

What is the command to turn off tuned profile?

Answer 5

tuned-adm off

Question 6

What are the levels for nice from highest priority to lowest priority?

Answer 6

-20 (highest priority) to 19 (lowest priority)

Question 7

What is a nice value?

Answer 7

Can be seen using command top or ps
It is a user-space priority

Question 8

What is PR?

Answer 8

The actual process’s priority that is used by the linux kernel
Can also be seen in top

Question 9

How can you see process priority through the ps command?

Answer 9

ps axo pid,comm,nice,cls –sort=-nice

Question 10

How can you set process priority?

Answer 10

nice -n # process-name
ex: nice -n -15 top

Question 11

How can you change process priority?

Answer 11

renice -n # PID
ex: renice -n 12 PID