Wrong "load average"

Hello,

I’m runnig the server with OpenSUSE 11.4 installed and the “load average” is always almost the same:

load average: 0.00, 0.01, 0.05

But cpu% usage during the day is definately more than 30%.

The same thing is on another server with default kernel 2.6.37.1-1.2-desktop also.

What could be the problem?

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

“Load Average” does not mean how busy your CPU is. Looking at that
output (via uptime for example) having a value of 5 is actually pretty
high. It indicates the number of jobs in the job queue on average over
the last one, five, and fifteen minutes. Waiting means your box cannot
get to them because it’s doing other things so typically a higher load
average means your box is more behind, but having a CPU busy does not
mean your system is behind.

man uptime for the basics.

Good luck.


Want to yell at me in person?
Come to BrainShare 2011 in October: http://tinyurl.com/brainshare2011
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.15 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/
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=6pWf
-----END PGP SIGNATURE-----

Sorry, i didn’t get… When i had opensuse 10.3 running under the same load , the “load average” showed other numbers, e.g 10.1, 10.2, 11.0
But with 11.4 its always like this:

top - 21:53:45 up 12:54, 1 user, load average: 0.00, 0.01, 0.05
Tasks: 124 total, 6 running, 118 sleeping, 0 stopped, 0 zombie
Cpu(s): 38.5%us, 1.5%sy, 0.0%ni, 58.9%id, 0.0%wa, 0.0%hi, 1.0%si, 0.0%st

And I don’t get why its do different … Is it cpu issue ? (Q6600 vs my new i7)

On Thu, 01 Sep 2011 19:06:03 +0000, LuminaL wrote:

> Sorry, i didn’t get… When i had opensuse 10.3 running under the same
> load , the “load average” showed other numbers, e.g 10.1, 10.2, 11.0 But
> with 11.4 its always like this:
>
> top - 21:53:45 up 12:54, 1 user, load average: 0.00, 0.01, 0.05 Tasks:
> 124 total, 6 running, 118 sleeping, 0 stopped, 0 zombie Cpu(s):
> 38.5%us, 1.5%sy, 0.0%ni, 58.9%id, 0.0%wa, 0.0%hi, 1.0%si, 0.0%st
>
> And I don’t get why its do different … Is it cpu issue ? (Q6600 vs my
> new i7)

No, it’s not a CPU issue. The fact that you’re seeing lower averages is
good. 11.4 has a newer kernel with different optimizations than what
were in 10.3, so you reasonably could expect the system load to be
different, because the kernel has changed.

Load average is about more than an instantaneous CPU utilization read -
it’s about a trend; but it also seems to be highly dependent on I/O
channel utilization, which is why the load average can be high when the
CPU utilization is practically nothing.

http://www.linuxjournal.com/article/9001

This is an older article, but looks to be a good primer on what load
average is all about.

Jim

Jim Henderson
openSUSE Forums Administrator
Forum Use Terms & Conditions at http://tinyurl.com/openSUSE-T-C

Thanks! I got it now :slight_smile:

On Fri, 02 Sep 2011 06:26:03 +0000, LuminaL wrote:

> Thanks! I got it now :slight_smile:

Glad to help out. :slight_smile:

Jim


Jim Henderson
openSUSE Forums Administrator
Forum Use Terms & Conditions at http://tinyurl.com/openSUSE-T-C