Oracle Resource manager. A Doubt ????
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Thread: Oracle Resource manager. A Doubt ????

  1. #1
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    Hi,
    We are in the process of implementing Oracle Resource Plans and while reading the documentation I came across the follwing.

    What is the Database Resource Manager?
    Typically, when database resource allocation decisions are left to the operating system, you may encounter the following problems:

    Excessive overhead


    Excessive overhead results from operating system context switching between Oracle servers when the number of servers is high.


    Inefficient scheduling

    The operating system de-schedules Oracle servers while they hold latches, which is inefficient.


    Please note the statements above in bold . I am confused as to what they mean.

    Can somebody please throw more light on them.

    Thanks

    Ronnie
    ronnie_yours@yahoo.com

    You can if you think you can.

  2. #2
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    Still waiting....
    Ronnie
    ronnie_yours@yahoo.com

    You can if you think you can.

  3. #3
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    It's tough to look intelligent while commenting on something that is taken out of context.
    Jeff Hunter
    marist89@yahoo.com
    http://marist89.blogspot.com/
    Get Firefox!
    "I pledge to stop eating sharks fin soup and will not do so under any circumstances."

  4. #4
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    Originally posted by marist89
    It's tough to look intelligent while commenting on something that is taken out of context.
    Come on Guru's,

    Somebody out there should be able to throw some light on the follwoing statements and still sound/look intelligent. :-)



    (1)Excessive overhead results from operating system context switching between Oracle servers when the number of servers is high.

    (2) The operating system de-schedules Oracle servers while they hold latches, which is inefficient.

    Ronnie
    ronnie_yours@yahoo.com

    You can if you think you can.

  5. #5
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    good luck on that...
    Jeff Hunter
    marist89@yahoo.com
    http://marist89.blogspot.com/
    Get Firefox!
    "I pledge to stop eating sharks fin soup and will not do so under any circumstances."

  6. #6
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    I'm curious to know under what context oracle is talking about
    Excessive overhead
    Inefficient scheduling
    Could you post the oracle doc links pl....
    Reddy,Sam

  7. #7
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    it's talking about operating system processes switches

    you have to read about unix books to understand context switches in processes, this not about Oracle but Operating system. Context switch is expensive, for example most latches avoid context switch , instead it spins since spinning costs less that a context switch

    Scheduling, it must be talking about schedule daemon of processes in OS as well. I am not UNIX expert you might as go to google and search for unix process context switch and process scheduling

  8. #8
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    Originally posted by pando
    it's talking about operating system processes switches
    Thats what I thought. ronnie was talking about this under DBRM context... so just wanted member to post referred documentation links...
    Reddy,Sam

  9. #9
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    Originally posted by sreddy
    I'm curious to know under what context oracle is talking about
    Excessive overhead
    Inefficient scheduling
    Could you post the oracle doc links pl....

    http://docs.oracle.com/cd_a87860/doc.../dbrm.htm#5080
    Ronnie
    ronnie_yours@yahoo.com

    You can if you think you can.

  10. #10
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    yea well those text is not that easy to understand, I got it because I am reading unix books since last month to understand how unix works

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