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Thread: disk io

  1. #1
    Rick Bousquet NNTP User

    Default disk io

    I am asking if anyone can give me some info to figure out an ongoing issue
    here. I Have been plagued with this issue since 10.3. I am running with a
    hardware raid on my system. It just suddenly starts having lots of disk io
    for no apparent reason. I am currently on 11.0 now and would really like to
    resolve this issue. This issue does not happen on 10.2. I have disabled and
    removed beagle trying to resolve it. It just kills the performance of the
    machine when it happens. Are there any commands that will help me figure
    out why this is happening? I really do want to get on version 11 and
    beyond. I am dazed and confused from all the hours of trying to figure this
    one out

    Thanks
    Rick

  2. #2
    Rick Bousquet NNTP User

    Default Re: disk io

    Rick Bousquet wrote:

    > I am asking if anyone can give me some info to figure out an ongoing issue
    > here. I Have been plagued with this issue since 10.3. I am running with a
    > hardware raid on my system. It just suddenly starts having lots of disk io
    > for no apparent reason. I am currently on 11.0 now and would really like
    > to resolve this issue. This issue does not happen on 10.2. I have disabled
    > and removed beagle trying to resolve it. It just kills the performance of
    > the machine when it happens. Are there any commands that will help me
    > figure out why this is happening? I really do want to get on version 11
    > and beyond. I am dazed and confused from all the hours of trying to figure
    > this one out
    >
    > Thanks
    > Rick



    Oh the raid controller is a Adaptec 3405.


  3. #3

    Default Re: disk io

    Type "top" in the shell to see what processes are taking up the most resources. It's a good thing to get rid of everything related to "kerry" or "beagle." Beagle search is definitely a resource hog.

  4. #4
    Rick Bousquet NNTP User

    Default Re: disk io

    BNG22908 wrote:

    >
    > Type "top" in the shell to see what processes are taking up the most
    > resources. It's a good thing to get rid of everything related to
    > "kerry" or "beagle." Beagle search is definitely a resource hog.
    >
    >



    As I said beagle is removed. I have tried with top and nothing is using cpu
    cycles when it is happening. That is why this is driving me crazy. I can't
    figure out why on 10.3 and 11 see it but not on 10.2.



  5. #5
    Join Date
    Jun 2008
    Location
    Oklahoma, US
    Posts
    822

    Default Re: disk io

    Rick Bousquet wrote:

    > BNG22908 wrote:
    >
    >>
    >> Type "top" in the shell to see what processes are taking up the most
    >> resources. It's a good thing to get rid of everything related to
    >> "kerry" or "beagle." Beagle search is definitely a resource hog.
    >>
    >>

    >
    >
    > As I said beagle is removed. I have tried with top and nothing is using
    > cpu cycles when it is happening. That is why this is driving me crazy. I
    > can't figure out why on 10.3 and 11 see it but not on 10.2.


    Well, what is running when this occurs? What services (apache, smb, etc)
    are running?

    Can you cause it to happen by doing something? Is it reproducible somehow?

    {Chuckle} You've just told the mechanic that it makes a noise at 55mph...
    {Grin}

    Hardware raid shouldn't affect the system at all, as it should do it's own
    mirroring in the background.

    Do you have anything special installed?

    --
    L R Nix
    lornix@lornix.com

  6. #6
    Rick Bousquet NNTP User

    Default Re: disk io

    L R Nix wrote:

    > Rick Bousquet wrote:
    >
    >> BNG22908 wrote:
    >>
    >>>
    >>> Type "top" in the shell to see what processes are taking up the most
    >>> resources. It's a good thing to get rid of everything related to
    >>> "kerry" or "beagle." Beagle search is definitely a resource hog.
    >>>
    >>>

    >>
    >>
    >> As I said beagle is removed. I have tried with top and nothing is using
    >> cpu cycles when it is happening. That is why this is driving me crazy. I
    >> can't figure out why on 10.3 and 11 see it but not on 10.2.

    >
    > Well, what is running when this occurs? What services (apache, smb, etc)
    > are running?
    >
    > Can you cause it to happen by doing something? Is it reproducible
    > somehow?
    >
    > {Chuckle} You've just told the mechanic that it makes a noise at 55mph...
    > {Grin}
    >
    > Hardware raid shouldn't affect the system at all, as it should do it's own
    > mirroring in the background.
    >
    > Do you have anything special installed?
    >


    The only extra installed really is vmware server. I know that is not it
    because I tried removing it and the issue stayed. I really wish I could
    figure it out. I really don't want to stay at 10.2 anymore but will if I
    have no other choice.

    Thanks


  7. #7
    Join Date
    Jun 2008
    Location
    Oklahoma, US
    Posts
    822

    Default Re: disk io

    Rick Bousquet wrote:

    > L R Nix wrote:
    >
    >> Rick Bousquet wrote:
    >>
    >>> BNG22908 wrote:
    >>>
    >>>>
    >>>> Type "top" in the shell to see what processes are taking up the most
    >>>> resources. It's a good thing to get rid of everything related to
    >>>> "kerry" or "beagle." Beagle search is definitely a resource hog.
    >>>>
    >>>>
    >>>
    >>>
    >>> As I said beagle is removed. I have tried with top and nothing is using
    >>> cpu cycles when it is happening. That is why this is driving me crazy. I
    >>> can't figure out why on 10.3 and 11 see it but not on 10.2.

    >>
    >> Well, what is running when this occurs? What services (apache, smb, etc)
    >> are running?
    >>
    >> Can you cause it to happen by doing something? Is it reproducible
    >> somehow?
    >>
    >> {Chuckle} You've just told the mechanic that it makes a noise at 55mph...
    >> {Grin}
    >>
    >> Hardware raid shouldn't affect the system at all, as it should do it's
    >> own mirroring in the background.
    >>
    >> Do you have anything special installed?
    >>

    >
    > The only extra installed really is vmware server. I know that is not it
    > because I tried removing it and the issue stayed. I really wish I could
    > figure it out. I really don't want to stay at 10.2 anymore but will if I
    > have no other choice.
    >
    > Thanks


    Well, {Grin} If you don't try 11.0/11.1... then we'll never get it fixed,
    now will we?

    Wait... let me try persuasion.. uh... 10.2 is nearing it's end-of-support
    lifetime.. yeah... which means I'll need to update my server soon.

    uh, you've always wanted a system that "went to 11" !!

    oh drat, nothing else really comes to mind.

    Loni
    --
    L R Nix
    lornix@lornix.com

  8. #8
    Join Date
    Jun 2008
    Location
    Kansas City Area, Missouri, USA
    Posts
    7,236

    Default Re: disk io

    >
    > uh, you've always wanted a system that "went to 11" !!
    >
    > oh drat, nothing else really comes to mind.


    I never expected a "Spinal Tap" reference here. What a great movie.

    Larry

  9. #9
    Join Date
    Jun 2008
    Location
    Sarasota
    Posts
    301

    Default Re: disk io

    A little googling reveals that there is a utility (like 'top') for
    monitoring disk-usage by process (instead of cpu-usage), called 'iotop'.

    It's available here:
    Iotop's homepage

    Install the package 'python-curses' which it needs, and
    then just unzip it, go into its directory, and execute 'iotop.py'.

    Hope this will help to solve it.

    Cheers...

    Dave [who couldn't live without google]

  10. #10
    Join Date
    Jun 2008
    Location
    Sarasota
    Posts
    301

    Default Re: disk io

    More info on 'iotop':

    Lornix pointed out in another thread that 'iotop' is available
    in the repository, so install it from there, as then you should get
    a 'man' page for it. [When you run it, you can add the
    '--help' option to see other cmd-line arguments available,
    e.g. so you could lengthen the update-interval, etc.]

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