PH15684: ABEND04E RC00E2000C MAY OCCUR AT DSNGEPLC .DSNSVSVB OFFSET0B06 DUE TO A STORAGE POOL FULL CONDITION WHEN USING IFCID 400 OR 401

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• ABEND04E RC00E2000C MAY OCCUR AT DSNGEPLC .DSNSVSVB OFFSET0B06
  OR ABEND04E RC00E2000C MAY OCCUR AT DSNXEDS1 .DSNSVSVB
  OFFSET0B06 DUE TO A STORAGE POOL FULL CONDITION WHEN USING IFCID
  400 OR 401
  

Local fix

• TURN OFF IFCID 400 AND IFCID 401
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: Db2 11 and 12 for z/OS users of              *
  *                 Instrumentation Facility Interface           *
  *                 (IFI) READS for IFCID 400 and 401            *
  ****************************************************************
  * PROBLEM DESCRIPTION: ABEND04E RC00E2000C occurs at various   *
  *                      locations including:                    *
  *                       DSNGEPLC . DSNSVSVB + 0B06             *
  *                       DSNXEDS1 . DSNSVSVB + 0B06             *
  *                                                              *
  *                      The list above is not exhaustive.       *
  ****************************************************************
  * RECOMMENDATION: Apply corrective PTF when available.         *
  ****************************************************************
  There are 2 problem scenarios.
  
  1. IFI READS for IFCID 401 returns a snapshot of statistics for
  static SQL currently in the EDM pool.  If the user's buffer is
  not large enough to hold all the data to be returned, IFI READS
  will issue return code 4 in IFCARC1 and reason code '00E60802'x
  in IFCARC2.  When this situation occurs, some statistics blocks
  can be leaked in the STMT CACHE BLOCKS 2G pool .
  
  2. When IFCID 400 is active and a static SQL statement is
  issued, a statistics block is allocated when the statement
  is added to the EDM pool.  If a cancel occurs after the
  statistics block is allocted, but before addressability to
  the block is established, this storage can be leaked in
  the STMT CACHE BLOCKS 2G pool.
  
  NOTE: Accelerated static queries are also affected.
  

Problem conclusion

• For the problems listed in the Problem Description
  section, Db2 is modified to:
  
  1. For IFI READS of IFCID 401, Db2 will now process
  the entire list of static SQL statements regardless
  if the user's output buffer is full, to ensure all SHTEs
  are cleaned up properly.
  
  2. Modify statistics block allocation to close the cancel
  window between allocation and setting addressability
  for downstream components.
  
  Additional Keywords: DB2STGLK/K IFCID400 IFCID401
                       RC00E60802
  

Temporary fix

• *********
  * HIPER *
  *********
  

Comments

APAR Information

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

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

  UI65867 UI65868

Modules/Macros

•    DSNGEPLC DSNXELX  DSNXERDS
  

Fix information

• Fixed component name

  DB2 OS/390 & Z/

• Fixed component ID

  5740XYR00

Applicable component levels

• RB10 PSY UI65868

     UP19/10/30 P F910 Ž

• RC10 PSY UI65867

     UP19/10/30 P F910 Ž

Fix is available

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