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PM43497: FILE MANAGER DVT USED EXCESSIVE CPU

A fix is available

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APAR status

  • Closed as program error.

Error description

  • File Manager DVT when accessing Format4 DSCB for a
    non-conforming (eg. z/VM volume) or newly initialized VTOC
    was using more CPU than necessary when searching for a user
    specified data set.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All File Manager users displaying VTOCs.     *
    ****************************************************************
    * PROBLEM DESCRIPTION: The DVT function may waste processor    *
    *                      and I/O time when encountering volumes  *
    *                      that do not have a valid z/OS VTOC or   *
    *                      that have an empty VTOC.                *
    ****************************************************************
    * RECOMMENDATION: Apply the provided PTF.                      *
    ****************************************************************
    File Manager was not always performing a validity check on the
    extents of a VTOC, and then attempting to scan such VTOCs for
    entries matching the requested pattern.  Empty DSCBS for non-
    indexed volumes were also being unnecessarily stored
    internally.
    

Problem conclusion

  • File Manager DVT processing has been updated in order to always
    check the validity of VTOC extents in order to avoid unnecessary
    processing and to avoid storing empty DSCBs for non-indexed
    volumes.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM43497

  • Reported component name

    FILE MANAGER Z/

  • Reported component ID

    5655W4700

  • Reported release

    B10

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2011-07-11

  • Closed date

    2011-08-11

  • Last modified date

    2011-09-01

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

    PM36891

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

    UK70815 UK70816 UK70817 UK70818 UK70819

Modules/Macros

  • FMNBE94  FMNCM2OL FMNCOMN1 FMNCONS1 FMNCO2DL
    FMNDVT   FMNPPCLA FMNPPNAV FMNRMDAT FMN0LVL  FMN0LVLJ FMN0LVLK
    FMN0MENU FMN0MJPN FMN0MKOR FMN1BSSA FMN1DBIB FMN1DIFF FMN1FIL1
    FMN1ICOF FMN1ICPY FMN1LPST FMN1LVL  FMN1NOXP FMN1PORG FMN1RMDT
    FMN1TERM FMN1VLDO FMN2BDBQ FMN2BUTQ FMN2CATQ FMN2CGM2 FMN2CTQ2
    FMN2DBOL FMN2DBY  FMN2INTP FMN2ISPF FMN2IVSU FMN2LVL  FMN2MAIN
    FMN2RMDT FMN2RMR  FMN2RMUT FMN2SQTB FMN2UBLD
    

Fix information

  • Fixed component name

    FILE MANAGER Z/

  • Fixed component ID

    5655W4700

Applicable component levels

  • RB1A PSY UK70816

       UP11/08/20 P F108

  • RB10 PSY UK70815

       UP11/08/20 P F108

  • RB11 PSY UK70817

       UP11/08/20 P F108

  • RB12 PSY UK70818

       UP11/08/20 P F108

  • RB14 PSY UK70819

       UP11/08/20 P F108

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:
01 September 2011