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DB2 - Problem description

Problem IC78399 Status: Closed

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

product:
DB2 FOR LUW / DB2FORLUW / 970 - DB2
Problem 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.
Problem Summary:
**************************************************************** 
* USERS AFFECTED:                                              * 
* ALL                                                          * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* Same as error description.                                   * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade to DB2 Version 9.7 Fix Pack 5.                       * 
****************************************************************
Local Fix:
N/A
available fix packs:
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

Solution
First fixed in DB2 Version 9.7 Fix Pack 5.
Workaround
N/A
Comment
N/A
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
30.08.2011
20.09.2011
20.09.2011
Problem solved at the following versions (IBM BugInfos)
9.7.FP5
Problem solved according to the fixlist(s) of the following version(s)
9.7.0.5 FixList
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