PI87403: RTS TO EXTERNALIZE THE STATISTICS WHEN THE OBJECT IS IN UTRO

Obtain the fix for this APAR.

APAR status

• Closed as new function.

Error description

• This is a requirement from IDAA.
  If someone first runs a LOAD RESUME YES, then issues -ACCESS
  DB() SP() MODE(STATS) to externalize the RTS values.
  Then a following IDAA LOAD relies on the RTS values, which
  should have been externalized by the ACCESS command.
  However if there was a COPY running when the -ACCESS STATS
  command is issued, then RTS values are not externalized, which
  can cause the IDAA LOAD to fail.  It is a problem that neither
  the RTS nor -ACCESS STATS indicate that the RTS values were not
  externalized, because of the DBET UT status.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All Db2 12 for z/OS users using                              *
  * Real Time Statistics.                                        *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * User sees no indication that Real Time                       *
  * Statistics (RTS) was unable to update                        *
  * a record in SYSTABLESPACESTATS due                           *
  * to the corresponding table space being                       *
  * in UTRO or UTRW utility access mode.                         *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Apply corrective PTF when available                          *
  ****************************************************************
  Currently user can issues - ACCESS DB MODE(STATS) command to
  externalize in-memory RTS statistics to RTS tables.
  While Db2 is externalizing the in-memory statistics information
  by this command, the object can also being accessed by
  utility which puts object into utility access mode
  (UTRO,UTRW,UTUT), the externalization of RTS information
  will be deferred until the next externalization cycle.
  However Users will not have any indication externally that
  RTS data was not updated due to this scenario.
  

Problem conclusion

Temporary fix

Comments

• Function will only be implemented in Db2 V12 (C10).
  DB2 code has been modified when the user issues
  -ACCESS DB MODE(STATS) command to refresh RTS statistics
  on an object while object also in UTRO or UTRW
  access mode, then LASTDATACHANGE timestamp field will be
  updated if a logical change has occurred since the last
  externalization attempt.
  

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  UI65973

Modules/Macros

• DSNIRTSX
  

Fix information

• Fixed component name

  DB2 OS/390 & Z/

• Fixed component ID

  5740XYR00

Applicable component levels

• RC10 PSY UI65973

     UP19/10/26 P F910

Fix is available

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