A fix is available
APAR status
Closed as program error.
Error description
After setting the ZPARM INDEX_CLEANUP_THREADS=40 index pseudo delete cleanup performance was not as expected, with no reduction in the need for REORGs seen. INDEX_CLEANUP_THREADS=(any number) won't do pseudo delete cleanup as expected, so this apar is to make the cleanup more effective.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All DB2 11 for z/OS users having non zero * * value for INDEX_CLEANUP_THREADS subsystem * * parameter * **************************************************************** * PROBLEM DESCRIPTION: Index pseudo delete cleanup tasks can * * not cleanup pseudo deleted index * * entries effectively so the number of * * pseudo deleted index entries continue * * to grow over time * **************************************************************** * RECOMMENDATION: * **************************************************************** Index pseudo delete cleanup tasks can cleanup the committed pseudo deleted index entries from the indexes. While some of the pseudo deleted entries are removed by the cleanup tasks, the tasks can not keep up with the rate that the pseudo deleted entries are generated. So over the time, the number of pseudo deleted entries in the indexes continue to grow, the indexes need to be reorganized to remove the pseudo deleted entries.
Problem conclusion
Index manager pseudo delete cleanup code has been updated to remove the committed pseudo deleted index entries more effectively. The wait time between each cleanup call on the same index is reduced.
Temporary fix
Comments
APAR Information
APAR number
PI77164
Reported component name
DB2 OS/390 & Z/
Reported component ID
5740XYR00
Reported release
B10
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2017-02-23
Closed date
2017-06-22
Last modified date
2018-03-22
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
PI77165 UI48234
Modules/Macros
DSNKDAEM DSNKDAE1 DSNKDPEP DSNKGTSK DSNKTSKS
Fix information
Fixed component name
DB2 OS/390 & Z/
Fixed component ID
5740XYR00
Applicable component levels
RB10 PSY UI48234
UP17/07/07 P F707
Fix is available
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Document Information
Modified date:
22 March 2018