A fix is available
APAR status
Closed as program error.
Error description
Query refers XML columns fully scans DOCID index due to wrong best matching predicate used by DB2.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: * * All DB2 for z/OS users of XML * **************************************************************** * PROBLEM DESCRIPTION: * * A performance issue of excessive * * getpage during XML DOCID index access. * **************************************************************** * RECOMMENDATION: * * Apply corrective PTF when available. * **************************************************************** If XML value index was used to access table with XML column, at the stage of DOCID index scan process to gather rid list of qualifying base row, index look aside was not enabled. Therefore, performance degradation occurred during the process.
Problem conclusion
DB2 code has been modified to enable index look-aside for XML DOCID index access.
Temporary fix
********* * HIPER * *********
Comments
APAR Information
APAR number
PI62582
Reported component name
DB2 OS/390 & Z/
Reported component ID
5740XYR00
Reported release
A10
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2016-05-16
Closed date
2017-09-05
Last modified date
2017-10-02
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI50078 UI50079 UI50080
Modules/Macros
DSNIXLDI DSNIXLDR
Fix information
Fixed component name
DB2 OS/390 & Z/
Fixed component ID
5740XYR00
Applicable component levels
RC10 PSY UI50078
UP17/09/19 P F709 ¢
RB10 PSY UI50080
UP17/09/20 P F709 ¢
RA10 PSY UI50079
UP17/09/20 P F709 ¢
Fix is available
Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.
[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSEPEK","label":"Db2 for z\/OS"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"10.1","Edition":"","Line of Business":{"code":"LOB10","label":"Data and AI"}},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG19M","label":"APARs - z\/OS environment"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"10.1","Edition":"","Line of Business":{"code":"","label":""}}]
Document Information
Modified date:
02 October 2017