A fix is available
APAR status
Closed as program error.
Error description
Dynamically update TSMODEL DFHCKBR setting EXPINTMIN to zero during CICS initialisation and resetting to 5 when the CICS MQ Bridge is started for the first time
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All CICS users. * **************************************************************** * PROBLEM DESCRIPTION: The EXPIRYINTMin value of 5 minutes in * * the TSModel DFHCKBR causes TS QUEUE * * scanning to take place for all TS * * queues including those for which the * * model is not being used. This may lead * * to a big increase in CPU usage, * * particularly if shared TS queues exist. * **************************************************************** The TSModel DFHCKBR, required for transaction CKBR, specifies a minimum expiry interval (EXPIRYINTMin) of 5 minutes which causes TS Queue scanning to be initiated and run every minute by DFHTSCL.This may lead to a big increase in CPU usage, particularly if shared TS queues exist
Problem conclusion
Code has been added to set the EXPIRYINTMin value within the installed TSMB for DFHCKBR to zero during CICS initialisation and reset it to 5 minutes if the CICS MQ Bridge is started.
Temporary fix
Comments
APAR Information
APAR number
PH40409
Reported component name
CICS TS Z/OS V5
Reported component ID
5655Y0400
Reported release
300
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2021-09-07
Closed date
2021-10-18
Last modified date
2021-11-01
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI77678
Modules/Macros
DFHMQR0@ DFHMQTRI DFHSIPLT DFHTSMB DFHTSMBT
Fix information
Fixed component name
CICS TS Z/OS V5
Fixed component ID
5655Y0400
Applicable component levels
R300 PSY UI77678
UP21/10/19 P F110
Fix is available
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[{"Line of Business":{"code":"LOB35","label":"Mainframe SW"},"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSGMGV","label":"CICS Transaction Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"5.6"}]
Document Information
Modified date:
02 November 2021