Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

High CPU - where is my missing percentage???

Hi,

I have a quick question: my CPU is running as follows:

CPU utilization for five seconds: 79%/73%; one minute: 43%; five minutes: 27%

So why is it, when I add up the 5 sec % from all of the processes used, it equals 1.55%? What is using the other 77.45%, because frankly that seems like somewhat more important. Or is it that I am reading it wrong, and that they are not the same thing?

All the documentation that I've found so far relates to finding the process that's using the most CPU (seems sensible), and diagnosing from there. But my highest is 0.79% spanning-treee.

Many thanks!

J

2 REPLIES
Super Bronze

Re: High CPU - where is my missing percentage???

The "missing" CPU is interrupt CPU. You won't see this under processes.

Bronze

Re: High CPU - where is my missing percentage???

79%/73%;

The first number is the total amount of CPU that's used, the second number is the amount of processor that's interrupt driven, and doesn't show up in the process list.

Search the site for troubleshooting high CPU due to interrupts.

115
Views
0
Helpful
2
Replies
CreatePlease login to create content