Take the 2-minute tour ×
Server Fault is a question and answer site for system and network administrators. It's 100% free, no registration required.

When i run top command, it prints as follows in third line

0.1%us 0.2%sy 0.1%sy 0.0%ni 99.5%id 0.1%wa 0.0%hi 0.0%si 0.0%st

i want to know what does the line mean ? thanks

share|improve this question

1 Answer 1

up vote 4 down vote accepted

Shows CPU utilization details. “0.1%us” user processes are using 0.1%; “0.2%sy” system processes are using 0.2%; “99.5%id” percentage of available cpu; “0.1%wa” time CPU is waiting for IO.

When first analyzing the Cpu(s) line in top look at the %id to see how much cpu is available. If %id is low then focus on %us, %sy, and %wa to determine what is using the CPU.

share|improve this answer
    
Hi Rajat, I still hava a question with top. I notice that, the id% is 94%, but the total 'CPU%' of user processes is 12% or 13%, why it is not 6% ? –  larry Dec 21 '10 at 8:04
    
The process percentages are in terms of 1 CPU, while the numbers on the third line are in terms of all CPUs. –  rakslice Feb 14 '12 at 6:40

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.