IC78399: INCORRECT ESTIMATED DATA PAGE I/O COST FOR FETCH OPERATIONS USING PARTITIONED INDEXES WITH DETAILED INDEX STATISTICS.

DB2 Version 9.7 Fix Pack 5 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 6 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 7 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 8 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 9a for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 10 for Linux, UNIX, and Windows

APAR status

• Closed as program error.

Error description

• In some cases, the I/O cost associated with a data page fetch
  operation will be under-estimated when the index is partitioned,
  detailed index statistics have been collected and all index
  partitions must be accessed i.e. the query doesn't contain any
  predicates that can limit the number of index partitions that
  are accessed. The problem can be avoided by collecting
  non-detailed index statistics i.e. do not include the 'DETAILED'
  keyword on the RUNSTATS command.
  

Local fix

• N/A
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * ALL                                                          *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * Same as error description.                                   *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Upgrade to DB2 Version 9.7 Fix Pack 5.                       *
  ****************************************************************
  

Problem conclusion

• First fixed in DB2 Version 9.7 Fix Pack 5.
  

Temporary fix

• N/A
  

Comments

• N/A
  

APAR Information

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

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

Fix information

• Fixed component name

  DB2 FOR LUW

• Fixed component ID

  DB2FORLUW

Applicable component levels

• R970 PSN

     UP