PM82586: IMPROVE THE "TO SEQUENCE-END" VALUE IN MESSAGES DSNI043I AND DSNI044I

A fix is available

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APAR status

  • Closed as program error.

Error description

  • If the TO RBA or TO LRSN (sequence-end) value is unknown (ZEROS)
    at the time when an LPL/GRECP recovery is initiated, then
    LPL/GRECP recovery logic replaces the ZEROS with all FOXES
    (X'FFFFFFFFFFFF').  This could potentially elongate the
    LPL/GRECP recovery time.  Instead of replacing the sequence-end
    value with X'FFFFFFFFFFFF', it should replace it with the actual
    End-Of-the-Log value at the time of LPL/GRECP recovery.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All DB2 users.                               *
    ****************************************************************
    * PROBLEM DESCRIPTION: Provide more accurate "TO sequence-end" *
    *                      value in msgDSNI043I and msgDSNI044I.   *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    Currently, if the RBA or LRSN is unknown, at the time when
    LPL/GRECP recovery is initiated, msgDSNI043I and msgDSNI044I
    will display all foxes X'FF' in the "TO RBA" or "TO LRSN" field.
    This high value may elongate the recovery time.  The end-of-log
    RBA/LRSN is preferable to all foxes.
    
    Related investigation showed that there were some cases when LPL
    pages were added for a DB2 object that experienced an I/O error,
    which may not be during DB2 restart.  In these cases, the LPL
    page was added but the ending RBA or LRSN value was not updated.
    

Problem conclusion

  • The code has been changed to display the end-of-log RBA/LRSN for
    DSNI043I and DSNI044I, if the RBA/LRSN is unknown, when
    LPL/GRECP recovery starts.
    
    In addition, the code has been changed to update the ending RBA
    or LRSN in cases where LPL pages are added during non-DB2
    restart.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM82586

  • Reported component name

    DB2 OS/390 & Z/

  • Reported component ID

    5740XYR00

  • Reported release

    910

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-02-12

  • Closed date

    2013-11-01

  • Last modified date

    2013-12-02

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

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

    UI12095 UI12096 UI12097

Modules/Macros

  • DSNICLST DSNIDBMG DSNISREC
    

Fix information

  • Fixed component name

    DB2 OS/390 & Z/

  • Fixed component ID

    5740XYR00

Applicable component levels

  • RA10 PSY UI12095

       UP13/11/16 P F311

  • RB10 PSY UI12096

       UP13/11/16 P F311

  • R910 PSY UI12097

       UP13/11/16 P F311

Fix is available

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Document information


More support for:

DB2 for z/OS

Software version:

910

Reference #:

PM82586

Modified date:

2013-12-02

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