A fix is available
APAR status
Closed as program error.
Error description
This APAR is raised to look into making application address spaces non-swappable during end-of-task processing (CSQSTERM) and also during MQDISC and MQCONN processing based on the CONNSWAP setting (all other API calls are currently handled).
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 7 * * Release 1 Modification 0. * **************************************************************** * PROBLEM DESCRIPTION: MQ calls are delayed due to an address * * space doing an API call being swapped * * out. * **************************************************************** * RECOMMENDATION: * **************************************************************** The CONNSWAP attribute controls whether BATCH address spaces can be swapped out for certain MQ calls, excluding MQCONN and MQDISC. Thus, for an MQDISC call (or end of task processing) it is still possible that the BATCH address space is swapped out whilst holding on to MQ resources such as latches, causing a temporary impact on performance until it is swapped back in.
Problem conclusion
The code was changed for CONNSWAP to also affect MQCONN and MQDISC calls. Implicit MQDISC calls and RRS exits have been changed to always be non-swappable to prevent resource contention in MQ. 100Y CSQAPRHX CSQARIB CSQ3RRSX CSQ3RRXF CSQ3SSES CSQ3SSI2
Temporary fix
********* * HIPER * *********
Comments
APAR Information
APAR number
PI23535
Reported component name
WMQ Z/OS V7
Reported component ID
5655R3600
Reported release
100
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2014-08-08
Closed date
2014-09-16
Last modified date
2014-11-04
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI21366 PI27589
Modules/Macros
CSQAPRHX CSQARIB CSQ3RRSX CSQ3RRXF CSQ3SSES CSQ3SSI2
Fix information
Fixed component name
WMQ Z/OS V7
Fixed component ID
5655R3600
Applicable component levels
R100 PSY UI21366
UP14/10/07 P F410 ¢
Fix is available
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Document Information
Modified date:
04 November 2014