A fix is available
APAR status
Closed as program error.
Error description
Incorrect time delay was added for synchronization of IFCID 376 trace call causing performance impact.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All DB2 11 for z/OS users of the IFCID 376 * * trace. * **************************************************************** * PROBLEM DESCRIPTION: Possible performance impact when an * * IFCID 376 trace is active and there are * * a high number of concurrent threads * * which invoke the IFCID 376 trace. * **************************************************************** * RECOMMENDATION: * **************************************************************** When the IFICD 376 trace processing needs to be serialized across multiple threads, a suspend delay was added via APAR PI61920. Further analysis concluded that the delay could potentially increase elapsed time of some transactions when a high concurrency of IFCID 376 tracing occurs. In order to avoid potential performance complications, the decision was made to flag apar PI61920 as being in error and rewrite the IFCID 376 serialization.
Problem conclusion
The IFCID 376 serialization logic was rewritten. Additional Keywords: IFCID376 SQLCODE905 LOOP SQLPERFORMANCE LOOPDSNXRAIT DB2RLF ASUTIMELIMIT
Temporary fix
********* * HIPER * *********
Comments
APAR Information
APAR number
PI66594
Reported component name
DB2 OS/390 & Z/
Reported component ID
5740XYR00
Reported release
B10
Status
CLOSED PER
PE
YesPE
HIPER
YesHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2016-07-27
Closed date
2016-08-31
Last modified date
2017-06-06
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI40519
Modules/Macros
DSNWVCSP DSNWVCST DSNXRAIT
Fix information
Fixed component name
DB2 OS/390 & Z/
Fixed component ID
5740XYR00
Applicable component levels
RB10 PSY UI40519
UP16/09/15 P F609 «
Fix is available
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Document Information
Modified date:
06 June 2017