PM80037: NO DSNB327I GBP ADEQUATE FREE SPACE MESSAGE AFTER AUTO ALTER TO INCREASE SPACE COMPLETED SUCCESSFULLY

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• A message dsnb319a indicated there was a shortage of space.
  Then there was an automatic Group Buffer Pool alter initiated.
  IXC530I START ALTER REQUEST FOR STRUCTURE DSNxxxx_GBPx ACCEPTED.
  Plus message:
  DSNB325A  -B01A DSNB5STS THERE IS A CRITICAL SHORTAGE
                           OF SPACE IN GROUP BUFFER POOL GBPx
  This dsnb325i occurred as the number of changed pages went over
  90% of the total data elements.
  Then message IXC590i to indicate the auto alter had succesfully
  completed.
  IXC590I AUTOMATIC ALTER PROCESSING FOR STRUCTURE DSNxxxx_GBPx
  A display XCF shoed the changed data elements in this case went
  down to 11% of total data elements, however there was no
  subsequent dsnb327i to indicate that the GBP now had adequate
  free space.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All DB2 users in data sharing environment.   *
  ****************************************************************
  * PROBLEM DESCRIPTION: After MSGDSNB319A or MSGDSNB325A is     *
  *                      issued for a group buffer pool (GBP)    *
  *                      space shortage, the expected message    *
  *                      MSGDSNB327I may be missing when the     *
  *                      GBP free space becomes adequate.        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When GBP is 90% full or 75% full with changed data,
  MSGDSNB319A or MSGDSNB325A is issued for space shortage.
  When the changed data falls below 90% or 75% but it is still
  above 60% of the GBP capacity, the space shortage message is
  automatically deleted. DB2 incorrectly loses the space shortage
  tracking information causing the problem of missing MSGDSNB327I
  once the changed data drops to 60% or less.
  

Problem conclusion

• DB2 has been fixed to track the space shortage information
  correctly and issue MSGDSNB327I when there is plenty of space
  in the GBP.
  

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:

  UK91780 UK91781

Modules/Macros

• DSNB1CNE DSNB1GD1 DSNB5STS
  

Fix information

• Fixed component name

  DB2 OS/390 & Z/

• Fixed component ID

  5740XYR00

Applicable component levels

• RA10 PSY UK91780

     UP13/03/05 P F303

• R910 PSY UK91781

     UP13/03/05 P F303

Fix is available

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