PH66133: BSAM MODE AND ZIIP USAGE: EXCESSIVE ALLOCATION OF 31 BIT MEMORY LEADING TO ABNORMAL TERMINATION WHEN BSAM METHOD IS USED

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Db2 HPU excessively consumes 31 bit memory and can subsequently
  terminate in abend when the following conditions are fulfilled :
  - the unload is performed in native mode
  - the BSAM method is used for either input or output datasets
  - parallelism of LDS read is in effect
  
  The bigger the number of partitions and the rate of empty
  partitions in the tablespace,, the more likely the issue is to
  occur.
  

Local fix

• Disable the use of the BSAM method for both INPUT and OUTPUT,
  either at the step level with the SEQ_IO_METHOD option from the
  GLOBAL block or at the product level with the VUM039\IOMETHOD
  parameter.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of Db2 High Performance Unload for     *
  *                 z/OS                                         *
  ****************************************************************
  * PROBLEM DESCRIPTION: Db2 HPU excessively consumes 31 bit     *
  *                      memory and can subsequently terminate   *
  *                      in abend when the following conditions  *
  *                      are fulfilled :                         *
  *                      - the unload is performed in native     *
  *                        mode                                  *
  *                      - the BSAM method is used for either    *
  *                        input or output datasets              *
  *                      - parallelism of LDS read is in effect  *
  *                                                              *
  *                      The bigger the number of partitions     *
  *                      and the rate of empty partitions in     *
  *                      the tablespace, the more likely the     *
  *                      issue is to occur.                      *
  *                                                              *
  *                      Local fix : Disable the use of the      *
  *                      BSAM method for both INPUT and OUTPUT,  *
  *                      either at the step level with the       *
  *                      SEQ_IO_METHOD option from the GLOBAL    *
  *                      block or at the product level with the  *
  *                      VUM039\IOMETHOD parameter.              *
  ****************************************************************
  * RECOMMENDATION: Apply the PTF                                *
  ****************************************************************
  abnormal termination and/or excessive allocation of 31 bit
  memory when BSAM mode and zIIP usage
  

Problem conclusion

• Code has been changed to fix this problem
  

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:

Modules/Macros

• INZTOOLS INZUTIB1 INZUTIB2 INZUTILC INZUTILK
  

Fix information

• Fixed component name

  DB2 HI PERF UNL

• Fixed component ID

  5697F4400

Applicable component levels

• R520 PSY UO03303

     UP25/06/10 P F506

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.