PM03034: RC00E20003 OR RC00E20016 STORAGE SHORTAGE OCCURRED FROM VAST AMOUNT OF DVS BLOCKS ALLOCATED BY DSNIPPHO

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• RC00E20003 or RC00E20016 occurred from DB2 DBM1 address space
  due to a large amount of DVS blocks allocated by DSNIPPHO.
  The storage memory dump shows that each DVS has one DVO
  block and the DVS next pointer field is zero.
  This can occur when the zparm DSMAX is set high
  and the number of concurrent open data sets is high,
  the Universal Table Space is used and the physical close is at
  the partition level.
  DB2STGLK/K
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: DB2 z/OS V9 users using Universal Table      *
  *                 Spaces (partition by range or partition by   *
  *                 growth).                                     *
  ****************************************************************
  * PROBLEM DESCRIPTION: Excessive growth of BB1RMID storage     *
  *                      pool, caused by the existence of a      *
  *                      large number of orphaned DVS and        *
  *                      OBDREC blocks.                          *
  *                                                              *
  *                      Growth of this pool may result in       *
  *                      failures due to a shortage of storage   *
  *                      in the DBM1 address space, including    *
  *                      ABEND04E RC00E20003 or RC00E20016.      *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  A Universal Table Space (UTS) may have DVS and OBDREC blocks
  allocated for each partition which gets opened.  If the UTS
  is physically closed one partition at a time, some of these
  blocks may not be freed when the page set control blocks are.
  If the UTS is repeatedly opened and closed, these orphan
  blocks may build up and cause a storage shortage.
  

Problem conclusion

• The page set close logic has been modified to ensure that any
  residual DVS and/or OBDREC blocks get freed before freeing the
  control block storage for a UTS.
  

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:

  UK53986

Modules/Macros

• DSNB1CPS
  

Fix information

• Fixed component name

  DB2 OS/390 & Z/

• Fixed component ID

  5740XYR00

Applicable component levels

• R910 PSY UK53986

     UP10/02/13 P F002

Fix is available

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