IBM Support

IT10350: STORAGE PROVISIONING ENABLED CAUSES UNNECESSARY CHUNK EXTENDS AND BLOATS CHUNKS WITH A LOT OF FREE SPACE

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APAR status

  • Closed as program error.

Error description

  • When a dbspace has a chunk being extended, other threads that
    need space from that chunk
    will wait up to SP_WAITTIME to extend the same chunk with this
    stack on a table create for instance.
    
    (oninit)yield_processor_mvp
    (oninit)mt_yield
    (oninit)rsoutofspace
    (oninit)rspnbuild_sz
    (oninit)sqispnbuild
    (oninit)bldpartn
    (oninit)creatab
    (oninit)aud_creatab
    (oninit)excommand
    (oninit)sq_execute
    (oninit)sqmain
    (oninit)listen_verify
    (oninit)spawn_thread
    (oninit)th_init_initgls
    (oninit)startup
    
    If there are several threads that are waiting to extend the
    chunk, once they continue, they do
    not check to see if enough space exists after the extend that
    they were just waiting for that was
    issued by another thread.  So each thread that is waiting
    extends the chunk itself rather than
    using the new space.  Depending on activity this can bloat a
    chunk and use up a storage pool's
    available space in one swoop.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * storage provisioning                                         *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Update to IBM Informix Server 12.10.xC6                      *
    ****************************************************************
    

Problem conclusion

  • Problem Fixed In IBM Informix Server 12.10.xC6
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT10350

  • Reported component name

    IFMX ULT WHSE E

  • Reported component ID

    IM0019BOS

  • Reported release

    C10

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2015-07-27

  • Closed date

    2015-12-30

  • Last modified date

    2015-12-30

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

Fix information

  • Fixed component name

    IFMX ULT WHSE E

  • Fixed component ID

    IM0019BOS

Applicable component levels

  • RC10 PSN

       UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSBJS3","label":"Informix Ultimate Warehouse Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"C10","Edition":"","Line of Business":{"code":"LOB10","label":"Data and AI"}}]

Document Information

Modified date:
30 December 2015