A fix is available
APAR status
Closed as program error.
Error description
CHECK LOB for the DB2 CATALOG/DIRECTORY LOBs are running for longer time than expected. This is due to no prefetch used and there is high SYNC I/O.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: * * All DB2 11 for z/OS and DB2 12 for z/OS * * users of CHECK LOB utility. * **************************************************************** * PROBLEM DESCRIPTION: * * CHECK LOB on DSNDB01.SYSSPUXA ran with * * long elapsed time. * **************************************************************** * RECOMMENDATION: * * Apply corrective PTF when available. * **************************************************************** A CHECK LOB against the catalog table space DSNDB01.SYSSPUXA ran with a longer elapsed time than expected due to the high synchronized I/O in the CHECKLOB phase. The problem happened because no prefetch process was used for CHECK LOB utility to get the LOB pages.
Problem conclusion
CHECK LOB code has been modified to use sequential prefetch to get the LOB pages.
Temporary fix
Comments
APAR Information
APAR number
PI83928
Reported component name
DB2 OS/390 & Z/
Reported component ID
5740XYR00
Reported release
C10
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2017-07-03
Closed date
2017-08-15
Last modified date
2017-09-02
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI49578 UI49584
Modules/Macros
DSNUKLOB
Fix information
Fixed component name
DB2 OS/390 & Z/
Fixed component ID
5740XYR00
Applicable component levels
Fix is available
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Document Information
Modified date:
02 September 2017