Fixes are available
APAR status
Closed as program error.
Error description
There is a growing number of non-persistent data pages on a WebSphere MQ v6 queue manager running on z/OS being administered by a v7 Explorer. The longer the Explorer is connected to the queue manager, the larger the number of non-persistent data pages. The symptom on z/OS is high usage of the pageset assigned to AMQ.MQEXPLORER.* temporary dynamic queue(s). A CHINIT line trace shows MQGETs failing with RC=2 RSN=2024 (MQRC_SYNCPOINT_LIMIT_REACHED).
Local fix
Problem summary
**************************************************************** USERS AFFECTED: This problem affects users of the WebSphere MQ v7 Explorer managing a WebSphere MQ v6 queue manager on z/OS Platforms affected: Linux (Power),Linux (s390x),Linux (x86),Linux (x86-64), Linux (zSeries),Windows **************************************************************** PROBLEM SUMMARY: The WebSphere MQ Explorer was not issuing an MQCMIT call, as it did not expect the queue manager it was connected to to have syncpoints enabled by default. The WebSphere MQ Explorer should be setting MQGMO_NO_SYNCPOINT if it is not going to issue MQCMITs as the z/OS default is MQGMO_SYNCPOINT for destructive MQGETs.
Problem conclusion
Any MQGET calls from the Explorer not to be followed by a MQCMIT now specify MQGMO_NO_SYNCPOINT. Messages are retrieved correctly and there is no build up of syncpoints and data pages. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: v7.0 Platform Fix Pack 7.0.1.0 -------- -------------------- Windows U200306 Linux (x86) U823664 Linux (x86-64) U823773 Linux (zSeries) U823668 Linux (Power) U823666 The latest available maintenance can be obtained from 'WebSphere MQ Recommended Fixes' http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037 If the maintenance level is not yet available, information on its planned availability can be found in 'WebSphere MQ Planned Maintenance Release Dates' http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309 ---------------------------------------------------------------
Temporary fix
Comments
APAR Information
APAR number
IC59413
Reported component name
WMQ WINDOWS V7
Reported component ID
5724H7220
Reported release
700
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2009-01-08
Closed date
2009-03-12
Last modified date
2009-03-12
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
WMQ WINDOWS V7
Fixed component ID
5724H7220
Applicable component levels
R700 PSY
UP
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Document Information
Modified date:
31 March 2023