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Thread: Wrong "load average"

  1. #1

    Default 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?

  2. #2

    Default Re: Wrong "load average"

    -----BEGIN PGP SIGNED MESSAGE-----
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    "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.




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  3. #3

    Default Re: Wrong "load average"

    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)

  4. #4
    Join Date
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    Location
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    Posts
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    Default Re: Wrong "load average"

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

  5. #5

    Default Re: Wrong "load average"

    Thanks! I got it now

  6. #6
    Join Date
    Jul 2008
    Location
    Seattle, WA
    Posts
    17,071

    Default Re: Wrong "load average"

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

    > Thanks! I got it now


    Glad to help out.

    Jim



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

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