A fix is available
APAR status
Closed as program error.
Error description
Insert processing can be slow and using more CPU time than expected when inserting into a table of a table space with many tables. The problem also applies to a tablespace with only a few tables, but with a high amount of create / drop activity. DB2 incorrectly creates internal control blocks for all the tables (dropped and existing) in the table space, instead of just for the table being used.
Local fix
Set DSNZPARM PCTFREE_UPD=0 and PCTFREE FOR UPDATE 0 for the tablespace
Problem summary
**************************************************************** * USERS AFFECTED: DB2 10 for z/OS and DB2 11 for z/OS * * customers using zparm PCTFREE_UPD = -1 * * and has multi-table table space * * or specify PCTFREE FOR UPDATE -1 on a * * multi-table table space. * **************************************************************** * PROBLEM DESCRIPTION: PCTFREE_UPD zparm or PCTFREE FOR UPDATE * * with -1 value specified can cause * * excessive CPU usage. * **************************************************************** * RECOMMENDATION: Apply corrective PTF when available * **************************************************************** PCTFREE_UPDATE zparm or PCTFREE FOR UPDATE with -1 specified can cause excessive CPU usage during mass inserts on a multi-table table space with a large number of tables. Real-time statistics (RTS) was creating some internal control blocks unnecessarily, causing a performance degradation.
Problem conclusion
RTS has been updated to avoid creating extraneous control blocks.
Temporary fix
********* * HIPER * *********
Comments
APAR Information
APAR number
PI43482
Reported component name
DB2 OS/390 & Z/
Reported component ID
5740XYR00
Reported release
B10
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt
Submitted date
2015-06-22
Closed date
2015-09-01
Last modified date
2015-10-02
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI30753 UI30754
Modules/Macros
DSNIRTSU DSNISGRT DSNISMRT DSNKCEST DSNXORTS
Fix information
Fixed component name
DB2 OS/390 & Z/
Fixed component ID
5740XYR00
Applicable component levels
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.
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Document Information
Modified date:
02 October 2015