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PI46537: A DECREASE IN PERFORMANCE CAN OCCUR FOR CICS TRANSACTIONAL PROCESSES USING EXPONENTIATION.

A fix is available

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APAR status

  • Closed as program error.

Error description

  • (COB V5.2)  When compared to COB V4.2, a significant increase
    in response and CPU time can occur for CICS transactional
    processes where transactions are "short processes" by
    definition and exponentiation is used.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: Users of Enterprise COBOL 5.1 compiling and  *
    *                 running programs that have arithmetic        *
    *                 statements that compute exponential          *
    *                 expressions with large powers.               *
    *                                                              *
    ****************************************************************
    * PROBLEM DESCRIPTION: Performance problem:                    *
    *                      A program compiled with Enterprise      *
    *                      COBOL 5.1 ran slower than the same      *
    *                      program compiled with Enterprise        *
    *                      COBOL 4.2.                              *
    *                                                              *
    *                                                              *
    ****************************************************************
    * RECOMMENDATION: Apply the provided PTF.                      *
    *                                                              *
    ****************************************************************
    Exponential expressions with integral powers greater than 32
    were being less aggressively optimized than exponential
    expressions with smaller powers.
    

Problem conclusion

  • The compiler was modified to optimize exponential expressions
    with large powers.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PI46537

  • Reported component name

    ENT COBOL FOR Z

  • Reported component ID

    5655W3200

  • Reported release

    510

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2015-08-07

  • Closed date

    2015-08-24

  • Last modified date

    2015-10-02

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

    PI42686

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

Modules/Macros

  • IGYCBE
    

Fix information

  • Fixed component name

    ENT COBOL FOR Z

  • Fixed component ID

    5655W3200

Applicable component levels

  • R510 PSY UI30482

       UP15/09/02 P F509

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

Modified date:
02 October 2015