PH31813: BROKEN PAGE AFTER MSDSNB601I -XXXX BUFFER POOL BP32K1 FULL

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• A broken page may occyr after receiving msDSNB601I  -XXXX BUFFER
  POOL BP32K1 FULL if at the time the buffer pool full condition
  a page update for a page in the pool mentioned in the DSNB601i
  message was going on.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All Db2 11 and Db2 12 for z/OS users                         *
  * running SQL UPDATE on Universal (UTS)                        *
  * table spaces.                                                *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * A broken page may occur after                                *
  * receiving MSDSNB601I -XXXX BUFFER                            *
  * POOL FULL message on a Universal(UTS)                        *
  * table space while running SQL UPDATE                         *
  * workload.                                                    *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Apply corrective PTF when available                          *
  ****************************************************************
  During SQL UPDATE execution on a Universal(UTS) table space,
  Db2 reuses the space of a pseudo deleted data row to store
  the updated row. In this process, Db2 turns on the PGBROKEN
  flag on the data page before calling the get page on the
  space map page in order to mark the data page dirty.
  If a bufferpool full condition is encountered during the
  space map page get page call, the SQL UPDATE will fail
  and the data page will be left as broken with
  PGBROKEN flag on.
  

Problem conclusion

• During SQL UPDATE of the Universal(UTS) table space,
  Db2 code has been changed to mark the data page dirty in the
  space map page before turning on the PGBROKEN flag on the
  data page. This will avoid the data page being left as a
  broken page if the space map page update fails.
  

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:

  UI73578 UI73579

Modules/Macros

• DSNIREPR
  

Fix information

• Fixed component name

  DB2 OS/390 & Z/

• Fixed component ID

  5740XYR00

Applicable component levels

• RB10 PSY UI73578

     UP21/01/29 P F101

• RC10 PSY UI73579

     UP21/01/29 P F101

Fix is available

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