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  1. #1
    Join Date
    Aug 2004
    Posts
    8

    Unanswered: Shmdt:errno=22,out of shared memory segment

    Hi,

    My environment is :
    Operating system version:AIX 5.2
    IDS 7.31UD1
    The shared memory uses approximately about 1.5 GB.

    Out application is unabled to connect database and I find the error(out of the shared memory segment) in the message log. But the IDS didn't bring down the server,it still online. I can't find what make this happening. So how do I avoid this kind of error and what kind of parameter that I should take care?

    Thanks!!

  2. #2
    Join Date
    Oct 2003
    Posts
    706
    The root cause of the problem is that AIX can't allocate a shared-memory segment, or one that large. Has this problem surfaced only recently?
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  3. #3
    Join Date
    Aug 2004
    Posts
    8
    Yes,the server did not allocate another share memory segment and the problem is recently happened

    Thanks!!

  4. #4
    Join Date
    Jan 2003
    Posts
    30

    Machine specific notes

    Check your kernel parameters for the maximum number of shared memory segments.

    You are using the the 32-bit version : Check the machine specific notes for your maximum addressable shared memory.

    Place SHMTOTAL in your onconfig to limit the shared memory resources of Informix to the actual amount you can get from the operating system.

    Do not swap, it kills Informix's performance.

    Best regards

    Koen

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