PK82395: RPTSTG - LE STORAGE REPORT - SHOWS VERY LARGE 'SUGGESTED' VALUE FOR HEAPPOOLS PERCENTAGES

A fix is available

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • When specifying Initial HEAP Size and HEAPPOOLS similiar to:
    .
    HEAP(524288000,4194304,ANYWHERE,FREE,8192,4096)
    HEAPPOOLS(ON,8,5,16,2,80,1,808,12,960,8,2048,2,0,10,0,10,0,10,0,
    10,0,10,0,10)
    .
    The RPTSTG (LE Storage Report) shows very high (max=90)
    'Suggested Percentages':
    .
    Suggested Percentages for current Cell Sizes:
             HEAPP(ON,8,1,16,1,80,1,808,90,960,1,2048,2,0)
                                        --
    .
    HeapPools Summary:
      Cell  Extent   Cells Per  Extents    Maximum     Cells In
      Size  Percent  Extent     Allocated  Cells Used  Use
    -----------------------------------------------------------
          8    5     1638400       1          3538       3456
         16    2      436906       1          3901       3835
         80    1       59578       1          9689       9358
        808   12       77101       1         20801      20794
        960    8       43329       1          1365       1364
       2048    2        5100       1          4274       4243
    -----------------------------------------------------------
    *
    An SRDA instruction within CEEVSRPT is causing problems with
    Suggested Cell Percentages because of the very large values
    that are involved.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: Language Environment AMODE31 applications    *
    *                 using run-time options HEAPPOOLS(ON) and     *
    *                 RPTSTG(ON).                                  *
    ****************************************************************
    * PROBLEM DESCRIPTION: The storage report calculation that     *
    *                      determines the suggested percentage     *
    *                      for current cell sizes in the heap      *
    *                      pool may be incorrect when the initial  *
    *                      heap size allocation is very large.     *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    See problem description.
    

Problem conclusion

  • The implementation of the algorithm that determines suggested
    percentages in the storage report will explicitly direct the
    compiler to use unsigned values for all intermediate results
    to correct the problem.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PK82395

  • Reported component name

    LE FOR MVS & VM

  • Reported component ID

    568819801

  • Reported release

    709

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2009-03-13

  • Closed date

    2009-04-10

  • Last modified date

    2009-06-23

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

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

    UK45609 UK45610 UK45611 UK45647 UK45649 UK45650

Modules/Macros

  • CEEVSRPT CEEXHPST
    

Fix information

  • Fixed component name

    LE FOR MVS & VM

  • Fixed component ID

    568819801

Applicable component levels

  • R709 PSY UK45609

       UP09/04/23 P F904

  • R720 PSY UK45610

       UP09/04/23 P F904

  • R730 PSY UK45611

       UP09/04/23 P F904

  • R740 PSY UK45647

       UP09/04/23 P F904

  • R750 PSY UK45649

       UP09/04/25 P F904

  • R760 PSY UK45650

       UP09/05/13 P F905

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:

z/OS family

Software version:

709

Operating system(s):

MVS, z/OS

Reference #:

PK82395

Modified date:

2009-06-23

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