PK76676: MISS CLASSIFICATION ON INDEPENDENT ENCLAVE THAT ARE CREATED FOR ZIIP OFFLOAD THAT ARE SUBSYSTEM TYPE DB2

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• MISCLASSIFICATION involving an Independent Enclave that are
  created for zIIP offload.
  .
  Note:  This involves joint cooperation with WLM APAR OA26104.
  DB2PARALL/K
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: DB2 V8 users that exploit CP query           *
  *                 parallelism while in remote stored           *
  *                 procedures and UDFs.                         *
  ****************************************************************
  * PROBLEM DESCRIPTION: Independent enclaves for DB2 CP query   *
  *                      parallel tasks in remote stored         *
  *                      procedures and UDFs are unexpectedly    *
  *                      classified under the WLM subsytem type  *
  *                      DB2, which may result in unexpected     *
  *                      priorities for said tasks.              *
  *                                                              *
  *                      To get around this problem, users of    *
  *                      CP query parallelism had to define      *
  *                      classification rules for the WLM        *
  *                      subsystem type DB2, which is normally   *
  *                      used for sysplex query parallelism.     *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  While creating independent enclaves for DB2 query parallelism
  in remote stored procedures and UDFs, DB2 classified them
  according to the WLM subsystem type DB2 classification rules.
  This could result in unexpected priorities for the independent
  enclaves if the users did not have the classification rules
  defined for the WLM subsystem type DB2.
  
  Additionally, separate independent enclaves are resource-
  managed as independent transactions.
  

Problem conclusion

• DB2 has been enhanced to use work-dependent enclaves while
  creating parallel tasks in a stored procedure or UDF.
  
  Work-dependent enclaves will be considered a part of the
  underlying enclave's transaction.  For more information
  regarding work-dependent enclaves, please refer to the closing
  text of z/OS APAR OA26104.
  

Temporary fix

Comments

APAR Information

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

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

  UK47686

Modules/Macros

• DSNDTFC  DSNDTMQE DSNDTMT  DSNTTEPL DSNTTRUN
  DSNTTTC
  

Fix information

• Fixed component name

  DB2 OS/390 & Z/

• Fixed component ID

  5740XYR00

Applicable component levels

• R810 PSY UK47686

     UP09/07/08 P F907

Fix is available

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