PH14392: DSNT500I RC00C90089 EDM DBD SPACE FULL

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Many messages about DBD space full with rc00c90089 type602 :
  DSNT500I  -DSN  DSNGEDLC RESOURCE UNAVAILABLE
                           REASON 00C90089
                           TYPE 00000602
                           NAME EDM DBD SPACE
  This apar is retrofit to v11 for PI98892.
  DBDPOOL full condition may occur on structure owner DB2 member
  due to DBD pages incorrectly not being marked stealable.
  During Group Buffer Pool check point process,  the Db2 internal
  cast out task can miss a de-reference call to the DBD
  it just referenced.  This missed de-reference call makes those
  DBD pages non-stealable.
  The number of stealable paged QISEDLRU decreases, in the end
  results in DBD POOL FULL condition DSNT500I REASON CODE
  RC00C90089 and RESOURCE TYPE 00000602.
  

Local fix

• Increase EDM DBD CACHE dynamically.
  EDM DBD CACHE field , EDMDBDC subsystem parameter.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All Db2 11 for z/OS users.                   *
  ****************************************************************
  * PROBLEM DESCRIPTION: Database descriptor (DBD) POOL full     *
  *                      condition may occur due to database     *
  *                      descriptor(DBD) pages incorrectly       *
  *                      not being marked stealable.             *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  During Group Buffer Pool check point process,the Db2 internal
  cast out task may miss a de-reference call to the DBD which
  it just referenced.  This missed de-reference call makes those
  DBD pages non-stealable and number of stealable page
  decreases.
  At the end, it resulted in DBD POOL FULL condition and
  DSNT500I message issued with REASON CODE RC00C90089
  RESOURCE TYPE 00000602.
  

Problem conclusion

• Db2 code has been updated so that DBD pages
  will be marked stealable correctly.
  
  Keywords:
  MSGDSNT500I RC00C90089
  

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:

  UI65348

Modules/Macros

•    DSNIFPSC
  

Fix information

• Fixed component name

  DB2 OS/390 & Z/

• Fixed component ID

  5740XYR00

Applicable component levels

• RB10 PSY UI65348

     UP19/10/02 P F910

Fix is available

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