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PI38433: IMPROVE IDAA WLB CAPACITY FORMULA

A fix is available

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You can track all active APARs for this component.

APAR status

  • Closed as new function.

Error description

  • DB2IDAA defect pi38433 dpi38433
    Improve IDAA WLB capacity formula
    ***************************************************************
    Additional Symptoms and Keywords:
     IDAA IDAAV4R1/K
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All DB2 for z/OS users who use IBM DB2       *
    *                 Analytics Accelerator (IDAA).                *
    *                 Specifically those that have two or more     *
    *                 IDAA V4 (or higher) accelerators.            *
    ****************************************************************
    * PROBLEM DESCRIPTION: Work Load Balancing is not choosing the *
    *                      best accelerator for off-loading work.  *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    When two or more IDAA V4 accelerators are available for
    off-loading, DB2 utilizes a Work Load Balancing (WLB) technique
    to distribute work to the accelerators.
    Under certain situations, this technique is not sufficient and
    causes work to be distributed to an inappropriate accelerator
    and hence work may not be properly balanced.
    

Problem conclusion

Temporary fix

Comments

  • DB2 Accelerator Work Load Balancing processing has been changed
    to apply a new formula when calculating the accelerator loading
    factor.
    

APAR Information

  • APAR number

    PI38433

  • Reported component name

    DB2 OS/390 & Z/

  • Reported component ID

    5740XYR00

  • Reported release

    B10

  • Status

    CLOSED UR1

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2015-04-03

  • Closed date

    2015-09-17

  • Last modified date

    2015-11-04

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

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

    UI31257 UI31258

Modules/Macros

  •    DSNX8CTG DSNX8EKG DSNX8INI DSNX8WAC
    

Fix information

  • Fixed component name

    DB2 OS/390 & Z/

  • Fixed component ID

    5740XYR00

Applicable component levels

  • RA10 PSY UI31257

       UP15/10/03 P F510

  • RB10 PSY UI31258

       UP15/10/03 P F510

Fix is available

  • Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.



Document information

More support for: DB2 for z/OS

Software version: B10

Reference #: PI38433

Modified date: 04 November 2015


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