PH48744: INCORRECT / MISSING STATISTICS CLASS 3 SMF DATA

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• When collecting Class 3 data, in some cases the expected data
  is not collected. For example, the bufferpool and psid can
  be incorrectly set to 0 for private queues, and the SMF record
  for a shared queue can be incorrectly omitted.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of IBM MQ for z/OS Version 9       *
  *                 Release 3 Modification 0.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: When collecting Queue Statistics SMF    *
  *                      115 CLASS(5) records:                   *
  *                                                              *
  *                      - QQSTPSID and QQSTBPID incorrectly     *
  *                      indicate a private queue is using       *
  *                      page set 0 and buffer pool 0.           *
  *                                                              *
  *                      - when enabling STATQ for shared queues *
  *                      the expected SMF 115 record is only     *
  *                      produced on the queue manager that      *
  *                      altered the queue's STATQ attribute.    *
  ****************************************************************
  The page set and buffer pool values associated with a queue
  were only being set in the QQST when the queue first
  transitioned from empty to non-empty. For queues that already
  contain Persistent messages, no such transition occurs (even
  if the queue is emptied and used again), leading to page set 0
  and buffer pool 0 being erroneously recorded.
  
  When changing the STATQ attribute for a shared queue, the queue
  definition in DB2 and XCF is updated, however the new value is
  not used on other queue managers until they next read the queue
  definition.
  

Problem conclusion

• CSQIERS3 is changed to set the correct page set and buffer pool
  id for queues that contain Persistent messages at start up.
  
  Alter Queue processing is changed to broadcast the change to the
  STATQ attribute to all queue managers in the QSG so that the
  updated value is used.
  

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:

  UI82232

Modules/Macros

• CSQIDPUT CSQIERS3 CSQMCNA1
  

Fix information

• Fixed component name

  IBM MQ Z/OS V9

• Fixed component ID

  5655MQ900

Applicable component levels

• R300 PSY UI82232

     UP22/09/17 P F209

Fix is available

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