A fix is available
APAR status
Closed as program error.
Error description
If the fix for APAR PH04893 (V9 - UI60516 & V9.1 - UI60517) is applied and afterwards only the CHIN ASID is restarted, the high CPU issue is not fully resolved. Both MSTR and CHIN ASID's must be restarted for the fix to be 100% effective. Therefore, this APAR is created as a PE against PTF UI60517 to fully resolve the high CPU issue in the case where only the CHIN ASID is restarted after the apply.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All users of IBM MQ for z/OS Version 9 * * Release 0 Modification 0 and Release 1 * * Modification 0. * **************************************************************** * PROBLEM DESCRIPTION: Customer sees a large increase, of 20%- * * 30% in CPU after applying and running * * fixes UI60516 or UI60517 (PH04893) ONLY * * in the CHINIT address space. * **************************************************************** Problem occurs when APAR PH04893 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
PH15912
Reported component name
IBM MQ Z/OS V9
Reported component ID
5655MQ900
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:
UI65604 UI65605
Modules/Macros
CMQXRMNT CSQIRECP CSQMFWCO CSQMSTRT CSQURFXC CSQXRCTL CSQXRFXC CSQXRRMF
Fix information
Fixed component name
IBM MQ Z/OS V9
Fixed component ID
5655MQ900
Applicable component levels
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.
[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSYHRD","label":"IBM MQ"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"9.0","Edition":"","Line of Business":{"code":"LOB45","label":"Automation"}}]
Document Information
Modified date:
01 November 2019