A fix is available
APAR status
Closed as program error.
Error description
If the fix for APAR PH03551 (PTF UI60541) is applied and afterwards only the CHIN ASID is restarted and not the MSTR, the CPU condition is not fully resolved. This APAR will flag PTF UI60541 as PE and provide high CPU relief even if only the CHIN ASID is restarted immediately after the apply. It is worth noting that the fix for APAR PH03551 will resolve the entire high CPU issue once both the MSTR and CHIN ASID's are restarted.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All users of IBM MQ for z/OS Version 8 * * Release 0 Modification 0. * **************************************************************** * PROBLEM DESCRIPTION: Customer sees a large increase, of 20%- * * 30% in CPU after applying and running * * fix UI60541 (PH03551) ONLY in the * * CHINIT address space. * **************************************************************** Problem occurs when APAR PH03551 has been applied and only the channel initiator has been restarted, and not the Queue Manager address space itself.
Problem conclusion
Additional condition logic has been added to cater for when the channel initiator has been restarted but not the Queue Manager address space when the original fix/APAR has been applied.
Temporary fix
Comments
APAR Information
APAR number
PH15911
Reported component name
IBM MQ Z/OS V8
Reported component ID
5655W9700
Reported release
000
Status
CLOSED PER
PE
YesPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2019-08-21
Closed date
2019-10-01
Last modified date
2019-11-01
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI65603
Modules/Macros
CMQXRMNT CSQIRECP CSQMFWCO CSQMSTRT CSQURFXC CSQXRCTL CSQXRFXC CSQXRRMF
Fix information
Fixed component name
IBM MQ Z/OS V8
Fixed component ID
5655W9700
Applicable component levels
R000 PSY UI65603
UP19/10/29 P F910 {
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:
01 November 2019