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PM31808: VARIOUS DB2 SORT ISSUES INCLUDING PERFORMANCE, CNK436I AND ABENDS S878 OR S80A , S0C4 , 1188U, RC = 04A0, 4A4U , CNK046E

A fix is available

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APAR status

  • Closed as program error.

Error description

  • The PTF for this APAR will address the following items
    in the DB2 Sort product
    
    1. Remove informational DB2 Sort CNK436I message
    
       DETAILS:  The CNK436I message is issued from DB2 Sort
       at a site currently running SYNCSORT that is using the
       SYNCSORT GDSM feature.
    
       The PTF will make sure the CNK436I message is not issued.
    
       LOCAL FIX:  Please disregard the CNK436I msg.
    
    2. ABEND S878 or S80A in a DB2 Utility that invokes
       DB2 Sort in multiple parallel subtasks
    
       DETAILS:  ABEND S878 or S80A can occur in a DB2 Utility
       that invokes DB2 Sort in multiple parallel subtasks with
       a very limited amount of storage below the 16MB line.
       878 80A
    
    3. ABEND S0C4 in DB2 REORG utility with variable-length records
    
       DETAILS: ABEND S0C4 can occur in a DB2 REORG utility with
       variable-length records when the JBPDMX parameter is
       specified.
       0C4
    
    4. Performance degradation can occur on z9, z10 and z196
       processors
    
       DETAILS:   Compatibility support is required to achieve
       optimal performance on z9, z10 and z196 processors.
    
    5. ABEND S0C4 at QKQ1UNLD + X'194'
    
       DETAILS:  ABEND S0C4 can occur at QKQ1UNLD + X'194'
       in an incore sort when an unallocated storage area is
       attempted to be freed.
    
    6. ABEND S0C4 at the contents of register 7 + X'178';
       register 11 points to QKD3DBZD CSECT
    
       DETAILS:  ABEND S0C4 can occur due to incorrect space
                 calculations.
    
    7. ABEND 1188U, RC=04A0, ABEND 4A4U occurring intermittently
    
       DETAILS:   ABEND can occur intermittently on a z/OS 1.10
                  or later operating system.
    
    8. CNK046E SORT CAPACITY EXCEEDED ERROR
    
       DETAILS:   CNK046E is caused by DB2 Sort's erroneously
       limiting dynamically allocated SORTWKs to 32 in
       applications with a very limited amount of main storage.
    
    9. Inadequate message information when filesize estimate is
       inaccurate.
    
       ERROR DESCRIPTION:
    
       If DB2 Sort terminates unsuccessfully because the filesize
       estimate was substantially less than the actual filesize,
       the CNK526E message is issued without any diagnostic
       information.
       The fix will cause a CNK153E message to be issued instead,
       advising that the filesize estimate needs to be corrected.
    

Local fix

  • See individual items above.
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED: Users of DB2 Sort.                           *
    ****************************************************************
    * PROBLEM DESCRIPTION: The PTF for this APAR will address the  *
    *                      following items in the DB2 Sort         *
    *                      product                                 *
    *                                                              *
    *                      1. Remove informational DB2 Sort        *
    *                      CNK436I message                         *
    *                      DETAILS:  The CNK436I message is        *
    *                      issued from DB2 Sort at a site          *
    *                      currently running SYNCSORT that is      *
    *                      using the SYNCSORT GDSM feature.        *
    *                      The PTF will make sure the CNK436I      *
    *                      message is not issued.                  *
    *                      LOCAL FIX:  Please disregard the        *
    *                      CNK436I msg.                            *
    *                      2. ABEND S878 or S80A in a DB2 Utility  *
    *                      that invokes DB2 Sort in multiple       *
    *                      parallel subtasks                       *
    *                      DETAILS:  ABEND S878 or S80A can occur  *
    *                      in a DB2 Utility that invokes DB2 Sort  *
    *                      in multiple parallel subtasks with a    *
    *                      very limited amount of storage below    *
    *                      the 16MB line. 878 80A                  *
    *                      3. ABEND S0C4 in DB2 REORG utility      *
    *                      with variable-length records            *
    *                      DETAILS: ABEND S0C4 can occur in a DB2  *
    *                      REORG utility with variable-length      *
    *                      records when the JBPDMX parameter is    *
    *                      specified. 0C4                          *
    *                      4. Performance degradation can occur    *
    *                      on z9, z10 and z196 processors          *
    *                      DETAILS:   Compatibility support is     *
    *                      required to achieve optimal performance *
    *                      on z9, z10 and z196 processors.         *
    *                      5. ABEND S0C4 at QKQ1UNLD + X'194'      *
    *                      DETAILS:  ABEND S0C4 can occur at       *
    *                      QKQ1UNLD + X'194' in an incore sort     *
    *                      when an unallocated storage area is     *
    *                      attempted to be freed.                  *
    *                      6. ABEND S0C4 at the contents of        *
    *                      register 7 + X'178'; register 11 points *
    *                      to QKD3DBZD CSECT                       *
    *                      DETAILS:  ABEND S0C4 can occur due to   *
    *                      incorrect space calculations.           *
    *                      7. ABEND 1188U, RC=04A0, ABEND 4A4U     *
    *                      occurring intermittently                *
    *                      DETAILS: ABEND can occur intermittently *
    *                      on a z/OS 1.10 or later operating       *
    *                      system.                                 *
    *                      8. CNK046E SORT CAPACITY EXCEEDED ERROR *
    *                      DETAILS: CNK046E is caused by DB2       *
    *                      Sort's erroneously limiting dynamically *
    *                      allocated SORTWKs to 32 in applications *
    *                      with a very limited amount of main      *
    *                      storage.                                *
    *                      9. Inadequate message information when  *
    *                      filesize estimate is inaccurate.        *
    *                      ERROR DESCRIPTION:                      *
    *                      If DB2 Sort terminates unsuccessfully   *
    *                      because the filesize estimate was       *
    *                      substantially less than the actual      *
    *                      filesize, the CNK526E message is issued *
    *                      without any diagnostic information. The *
    *                      fix will cause a CNK153E message to be  *
    *                      issued instead, advising that the       *
    *                      filesize estimate needs to be           *
    *                      corrected.                              *
    ****************************************************************
    * RECOMMENDATION: APPLY the PTF.                               *
    ****************************************************************
    Code has been changed to correct this condition.
    

Problem conclusion

  • APPLY the PTF.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM31808

  • Reported component name

    DB2 SORT FOR Z/

  • Reported component ID

    5655W4200

  • Reported release

    110

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2011-02-02

  • Closed date

    2011-03-02

  • Last modified date

    2011-04-04

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

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

    UK65388

Modules/Macros

  • CNKCABND CNKCINCR CNKCOPTC CNKCOPTD CNKCRVEC
    CNKCSRA  CNKCSVC  CNKD3DBZ CNKD3OPT CNKS1CA2 CNKS1VNO CNK0ACOR
    CNK0MGR1 CNK0SETU CNK1SWM  CNK4MSET CNK4MSGS
    

Fix information

  • Fixed component name

    DB2 SORT FOR Z/

  • Fixed component ID

    5655W4200

Applicable component levels

  • R110 PSY UK65388

       UP11/03/22 P F103

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:
04 April 2011