PH62746: Enhancements to Z Code Optimization Advice for COBOL programs compiled with DYNAM, SSRANGE, or NUMCHECK

Obtain the fix for this APAR.

APAR status

• Closed as unreproducible in next release.

Error description

• Enhancements to Z Code Optimization Advice for COBOL programs
  compiled with DYNAM, SSRANGE, or NUMCHECK
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of Z Code Optimization Advice who      *
  *                 have programs compiled with DYNAM, SSRANGE,  *
  *                 or NUMCHECK.                                 *
  ****************************************************************
  * PROBLEM DESCRIPTION: New Function:                           *
  *                      1. The performance impact of SSRANGE    *
  *                      and NUMCHECK are now measured.          *
  *                                                              *
  *                      2. Z Code Optimization Advice           *
  *                      recommends you use NODYNAM if all the   *
  *                      programs it analyzes are COBOL 5+, or   *
  *                      if all the programs it analyzes are     *
  *                      COBOL 4/earlier. However, there may be  *
  *                      programs in your application that were  *
  *                      not analyzed, so there could be a       *
  *                      COBOL 4/earlier program that wasn't     *
  *                      analyzed in a COBOL 5+ application or   *
  *                      a COBOL 5+ program that wasn't          *
  *                      analyzed in a COBOL 4/earlier           *
  *                      application, in which case DYNAM is     *
  *                      the best choice. As Z Code              *
  *                      Optimization Advice cannot know         *
  *                      whether an application has additional   *
  *                      programs that Z Code Optimization       *
  *                      Advice is not aware of, there is now    *
  *                      an additional Consideration given when  *
  *                      NODYNAM is recommended, to suggest      *
  *                      that DYNAM is best if your application  *
  *                      mixes COBOL 4/earlier and COBOL         *
  *                      5/later programs.                       *
  ****************************************************************
  * RECOMMENDATION: Apply the IBM-provided PTF                   *
  ****************************************************************
  1. The performance impact of SSRANGE and NUMCHECK were not
  measured.
  
  2. Z Code Optimization Advice recommends the use of NODYNAM if
  all programs it was aware of were COBOL 4/earlier or if all
  programs it were aware of were COBOL 5+. This recommendation
  doesn't account for programs that may be part of the
  application that Z Code Optimization Advice is not aware of.
  

Problem conclusion

Temporary fix

Comments

• Z Code Optimization Advice was updated as follows:
  1. The impact of SSRANGE and NUMCHECK are now measured.
  
  2. There is now an additional Consideration given when NODYNAM
  is recommended, to suggest that DYNAM is best if your
  application mixes COBOL 4/earlier and COBOL 5/later programs.
  

APAR Information

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

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

  UI98002

Modules/Macros

• CQIACCEP CQIALC   CQIALLOC CQIAPPLY CQIBE    CQIBXITA CQICONFG
  CQIDDDEF CQIINIT  CQIINITJ CQIIVPE  CQIIVPJ  CQIIVPS1 CQIIVPS2
  CQIMSGE  CQIMSGK  CQIMSGT  CQIRECV  CQIRIDT  CQISMPE
  

Fix information

• Fixed component name

  CODE OPT ADVICE

• Fixed component ID

  5900B4M04

Applicable component levels

• R210 PSY UI98002

     UP24/09/18 P F409

Fix is available

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