PM92324: REDUCED INDEX BUILD PARALLELISM ON PARALLEL PARTITION LOAD WHEN RUNNING WITH DB2 SORT

A fix is available

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APAR status

  • Closed as program error.

Error description

  • Reduced index build parallelism on parallel partition LOAD when
    running with DB2 Sort
    

Local fix

  • N/A
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All DB2 9 for z/OS, DB2 10 for z/OS, and     *
    *                 DB2 11 for z/OS LOAD utility users           *
    ****************************************************************
    * PROBLEM DESCRIPTION: Reduced index build parallelism when    *
    *                      running LOAD with partition parallelism *
    *                      and DB2 Sort for z/OS caused by message *
    *                      DSNU397I DSNURPIB - NUMBER OF TASKS     *
    *                      CONSTRAINED BY VIRTUAL STORAGE BELOW.   *
    ****************************************************************
    * RECOMMENDATION: Apply corrective PTF when available          *
    ****************************************************************
    LOAD against a table space with multiple partitions and multiple
    indexes was using parallelism for both partitions and indexes as
    indicated by messages DSNU364I DSNURPPL - PARTITIONS WILL BE
    LOADED IN PARALLEL, NUMBER OF TASKS = mm and DSNU395I DSNURPIB
    INDEXES WILL BE BUILT IN PARALLEL, NUMBER OF TASKS = nn.
    
    When using DB2 Sort for z/OS the number of index build tasks was
    less than optimal and MSGDSNU397I indicated virtual storage
    constraints below the line.
    
    This happened for a large number of partitions being loaded in
    parallel and caused longer elapsed times.
    
    Additional keywords: MSGDSNU364I MSGDSNU395I
    

Problem conclusion

  • Code was changed to correct the calculation of parallel subtasks
    when running with DB2 Sort for z/OS.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM92324

  • Reported component name

    DB2 OS/390 & Z/

  • Reported component ID

    5740XYR00

  • Reported release

    A10

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-07-03

  • Closed date

    2013-08-19

  • Last modified date

    2013-10-04

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

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

    UK96826 UK96827 UK96828

Modules/Macros

  •    DSNURPIB
    

Fix information

  • Fixed component name

    DB2 OS/390 & Z/

  • Fixed component ID

    5740XYR00

Applicable component levels

  • RA10 PSY UK96826

       UP13/09/04 P F309

  • RB10 PSY UK96828

       UP13/09/04 P F309

  • R910 PSY UK96827

       UP13/09/04 P F309

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:

DB2 for z/OS

Software version:

A10

Reference #:

PM92324

Modified date:

2013-10-04

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