IBM Support

PI68188: PERFORMANCE DEGRADATION WITH USING SUBSTRING VALUES WITH THE SAME RECORD VARIABLE FOR BOTH THE FROM AND TO INDECIES

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APAR status

  • Closed as program error.

Error description

  • The performance degradation occurs because the logic detects the
    same variable when it was simply a variable and not when it was
    enclosed in a record. That enclosing caused the logic to think
    it was a different variable and hence needed to create a string
    to hold the intermediate value, instead of the higher performing
    logic.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * Applications that use the same substring variable for both   *
    * parts of the substring, and that variable is a field within  *
    * a record.                                                    *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * Performance degradation with using substring values with the *
    * same record variable for both the from and to indecies. This *
    * is because the logic detects the same variable when it was   *
    * simply a variable and not when it was enclosed in a record.  *
    * That enclosing caused the logic to think it was a different  *
    * variable and hence needed to create a string to hold the     *
    * intermediate value, instead of the higher performing logic.  *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    

Problem conclusion

  • The software has been updated to check for record variables
    correctly
    

Temporary fix

Comments

APAR Information

  • APAR number

    PI68188

  • Reported component name

    RATL BUS DEV

  • Reported component ID

    5724S5000

  • Reported release

    950

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-08-26

  • Closed date

    2019-01-17

  • Last modified date

    2019-01-17

  • 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

    RATL BUS DEV

  • Fixed component ID

    5724S5000

Applicable component levels

  • R901 PSY

       UP

  • R911 PSY

       UP

  • R950 PSY

       UP

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Document Information

Modified date:
16 October 2021