PI47210: PERFORMANCE DEGRADATION WITH ENTERPRISE COBOL V5 UNDER CICS

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• With Enterprise COBOL V5, the Working Storage section of a
  COBOL program is now included into the Writable Static Area
  (WSA). When linking several programs together, the size of the
  WSA can become very large. This may result in very high
  overhead during initialization.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of Enterprise COBOL V5 compiler who    *
  *                 compile with DATA(31) and DLL compiler       *
  *                 options, and who have applied APAR PI45771   *
  *                 and want the runtime support to complete the *
  *                 performance improvement.                     *
  *                                                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: Performance: Enterprise COBOL V5        *
  *                      programs may have performance           *
  *                      degradation when using the DATA(31) and *
  *                      DLL compiler options where the programs *
  *                      call out to other COBOL programs that   *
  *                      are linked together in a large DLL      *
  *                      (Dynamic Link Library). This PTF is to  *
  *                      enable the fix in compiler APAR         *
  *                      PI45771. This PTF has no effect without *
  *                      applying PI45771, and this PTF can be   *
  *                      applied before PI45771.                 *
  *                                                              *
  ****************************************************************
  * RECOMMENDATION: Apply provided service.                      *
  ****************************************************************
  In Enterprise COBOL V5, when DATA(31) is in effect, data items
  in WORKING-STORAGE are stored in an area called the 'writable
  static area' (WSA). This area is unnecessarily initialized to
  zero when the COBOL program is in a DLL. This initialization
  overhead may become significant when there is a very large
  number of Enterprise COBOL V5 programs linked in the DLL. This
  problem does not occur for non-DLL.
  

Problem conclusion

• Enterprise COBOL runtime library code is put in place to support
  the fix in PI45771.
  
  FIXCAT keyword:  COB0501T/K   COB0502T/K
  

Temporary fix

Comments

APAR Information

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

  PI45771

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

Modules/Macros

• IGZXLPKA
  

Fix information

• Fixed component name

  LE ENT COBOL LI

• Fixed component ID

  568819812

Applicable component levels

• R7A0 PSY UI34683

     UP16/01/28 P F601

• R780 PSY UI34684

     UP16/01/28 P F601

• R790 PSY UI34685

     UP16/01/28 P F601

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.