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PH37985: ENHANCEMENT OF WORKLOAD SIMULATION FEATURE

A fix is available

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APAR status

  • Closed as program error.

Error description

  • Resolution of minor errors in IZPCA Workload Simulation
    configuration files. Enhancements to Workload Simulator to
    improve consistency of results.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of IBM Z Performance and Capacity  *
    *                 Analytics Version 3.1.0 making use of the    *
    *                 Workload Simulator.                          *
    ****************************************************************
    * PROBLEM DESCRIPTION: In certain circumstances the Workload   *
    *                      Simulator produces inconsistencies      *
    *                      in results and in the degradation       *
    *                      factors for online workloads.           *
    *                                                              *
    *                      The Workload Simulator issues           *
    *                      messages with an incorrect identifier.  *
    *                                                              *
    *                      The Workload Simulator fails if         *
    *                      run with .level=INFO.                   *
    *                                                              *
    *                      Workload Simulator will run against     *
    *                      RMF intervals that are very short.      *
    *                                                              *
    *                      Running Workload Simulator against      *
    *                      short RMF intervals produce a           *
    *                      simulation result that is not           *
    *                      representative of the systems           *
    *                      behaviour.                              *
    ****************************************************************
    * RECOMMENDATION: Apply the provided PTFs.                     *
    ****************************************************************
    The Workload Simulator produces some inconsistent results.
    Dispatching may favour high priority batch workloads.
    
    The Workload Simulator may produce a varying
    degradation factor for online workloads in different runs.
    
    Some Workload Simulator messages are issued with an incorrect
    identifier.
    
    The Workload Simulator crashes if run with .level set to
    INFO.
    
    If the Workload Simulator is run against very short RMF
    intervals it produces a simulation result that is not
    representative of the systems behaviour.
    

Problem conclusion

  • The Workload Simulator is modified such that it produces
    consistency between runs.
    
    The calculation of the online workload degradation factor has
    been amended to provide consistency between runs.
    
    Messages issued by the Workload Simulator have been amended to
    ensure compliance with IZPCA message standards.
    
    The Workload Simulator will complete successfully when .level
    is set to INFO.
    
    A new error message, DRLJ0478E, is issued if the selected
    RMF Interval has data for less than 120 seconds.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PH37985

  • Reported component name

    TDS FOR Z/OS

  • Reported component ID

    569510100

  • Reported release

    CA8

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2021-06-08

  • Closed date

    2022-02-08

  • Last modified date

    2022-03-01

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

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

    UI79186 UI79187

Modules/Macros

  • DRLDOD32 DRLDOD38 DRLPJCO  DRLPJDM  DRLPJDS  DRLPJSD  DRLPJSM
    DRLTCPS1 DRLTKZX1
    

Fix information

  • Fixed component name

    TDS FOR Z/OS

  • Fixed component ID

    569510100

Applicable component levels

  • RC01 PSY UI79186

       UP22/02/10 P F202

  • RCA8 PSY UI79187

       UP22/02/10 P F202

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.

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Document Information

More support for:
IBM Z Decision Support

Software version:
CA8

Document number:
6553962

Modified date:
02 March 2022