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Hi, kjournald process utilizing more cpu usage in a virtual server. any advise?...
  1. 04-14-2009 #1
    Allimuthu
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    Kjournald CPU utilization

    Hi,

    kjournald process utilizing more cpu usage in a virtual server. any advise?
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  2. 04-15-2009 #2
    Rubberman
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    What exactly do you mean by "utilizing more cpu usage in a virtual server"? Do you mean according to top or similar tool run on the host system uses less as compared to the same tool run in the VM? If that is what you mean, then that is to be expected. After all, your VM only has a portion of your host system cpu resources and since the application in question (kjournald) requires the same number of CPU cycles to run in either situation, it will seem to the analysis tool running in the VM that kjournald is taking a larger portion of the CPU. If you have a multi-core system, then this apparent delta will likely be smaller.
    Sometimes, real fast is almost as good as real time.
    Just remember, Semper Gumbi - always be flexible!
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  3. 04-15-2009 #3
    Allimuthu
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    CPU usage 80-100%

    Hi,

    Thank you for your efforts on this.

    See, I am using a virtual machine that shared the cpu and disk drive. when I run the top command in the server, I saw the kjournald process`s cpu usage is getting more than 80 % in sequent interval.

    I have checked in another vm. Everything seems well.

    What could be the reason for this?

    Why the kjournald is occupying more cpu usage than normal?

    Any advise?

    ~Allimuthu

    " Tech codes"
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  4. 04-15-2009 #4
    Rubberman
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    Without access to the system, I really cannot say why this may be happening. I know that just idling, Solaris X86 takes 25-30% of one core on my 8 core system.
    Sometimes, real fast is almost as good as real time.
    Just remember, Semper Gumbi - always be flexible!
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  5. 04-15-2009 #5
    Allimuthu
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    Hey,

    I am sorry.... I could not give the access to you. anyway, if you have any docs for tuning give me
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  6. 04-15-2009 #6
    Rubberman
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    If you are running more than one Linux VM, and only one is showing this behavior, then I have to think that it is the configuration of that specific installation that is causing the problem. Have you updated the system running in the VM, especially KDE?
    Sometimes, real fast is almost as good as real time.
    Just remember, Semper Gumbi - always be flexible!
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  7. 04-19-2009 #7
    Allimuthu
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    Quote Originally Posted by Rubberman View Post
    If you are running more than one Linux VM, and only one is showing this behavior, then I have to think that it is the configuration of that specific installation that is causing the problem. Have you updated the system running in the VM, especially KDE?


    Yes, more VMs are running in that, this VM has only the issue with kjournald. yeah, I have updated the Latest DMA patch in the server.
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  8. 04-20-2009 #8
    Rubberman
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    Quote Originally Posted by Allimuthu View Post
    Yes, more VMs are running in that, this VM has only the issue with kjournald. yeah, I have updated the Latest DMA patch in the server.
    Well, if other VM's aren't showing this problem, then it might be something in the VM software installation itself, like needing a different version of the ext3 file system driver or some system libraries? Also, an instance of kjournald is run for each mounted ext3 file system. What happens when another ext3 file system is mounted in that VM?
    Sometimes, real fast is almost as good as real time.
    Just remember, Semper Gumbi - always be flexible!
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  9. 04-27-2009 #9
    Allimuthu
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    Quote Originally Posted by Rubberman View Post
    Well, if other VM's aren't showing this problem, then it might be something in the VM software installation itself, like needing a different version of the ext3 file system driver or some system libraries? Also, an instance of kjournald is run for each mounted ext3 file system. What happens when another ext3 file system is mounted in that VM?


    Thanks for your help!!!

    Let me check the virtualization in the server.
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