A fix is available
APAR status
Closed as unreproducible in next release.
Error description
High CPU in CSQ7PLRT
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 7 * * Release 1 Modification 0. * **************************************************************** * PROBLEM DESCRIPTION: High CPU utilisation in program * * CSQ7PLRT when SMF class(3) accounting * * trace is running. * **************************************************************** * RECOMMENDATION: * **************************************************************** Each time CSQ7PLRT is resumed by CSQ7COLL or CSQ7DEAL it scans a hash chain to look for deallocated tasks which it can then write SMF accounting for. This is inefficient and can be CPU intensive.
Problem conclusion
Temporary fix
Comments
CSQ7COLL and CSQ7DEAL have been changed so that they no longer place the deallocated thread block pointer on a hash chain but on a list which contains only those threads which should be processed. This is much more efficient. ×**** PE14/06/06 FIX IN ERROR. SEE APAR PI19319 FOR DESCRIPTION
APAR Information
APAR number
PI05792
Reported component name
WMQ Z/OS V7
Reported component ID
5655R3600
Reported release
100
Status
CLOSED UR1
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2013-11-08
Closed date
2014-04-14
Last modified date
2014-06-12
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI17012
Modules/Macros
CSQ7COLL CSQ7DEAL CSQ7PLRT
Fix information
Fixed component name
WMQ Z/OS V7
Fixed component ID
5655R3600
Applicable component levels
R100 PSY UI17012
UP14/05/17 P F405
Fix is available
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Document Information
Modified date:
12 June 2014