A fix is available
APAR status
Closed as unreproducible in next release.
Error description
Performance issue related to CBPLIM and CPDTLIM when storage fragmentation occurs running huge workload.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: ALL TWS for z/OS 8.3.0, 8.5.0 and * * 8.5.1 USERs * * * * FUNCTION=NMM * **************************************************************** * PROBLEM DESCRIPTION: The use of parameters CPBPLIM and * * CPDTLIM can cause performance * * issues when storage fragmentation * * occurs due to big plans execution. * **************************************************************** * RECOMMENDATION: APPLY THE PTF FIXING THIS APAR * **************************************************************** The use of parameters CPBPLIM and CPDTLIM can cause performance issues when storage fragmentation occurs due to big plans execution.
Problem conclusion
Temporary fix
Comments
Problem is caused by the fact that any time CP is closed for example due to backup or for a new CP generation, the LSR buffer pool is deleted and reallocated. The buffer pool allocation is made by means of a GETMAIN and the required amount of storage is expected to be contiguous. In case of storage fragmentation, the allocated buffer pool can be smaller than expected.
APAR Information
APAR number
PM12394
Reported component name
TIV WRKLD SCHD
Reported component ID
5697WSZ01
Reported release
300
Status
CLOSED UR1
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2010-04-16
Closed date
2011-01-10
Last modified date
2011-05-02
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UK63713 UK63714 UK63715 UK63743 UK63744 UK63745
Modules/Macros
DCLNMM DCLOPT EQQNMBLD EQQNMVRP EQQN12 EQQZOPTX
SC32126503 | SC32126504 | SC32126505 | SC32126703 | SC32126704 |
SC32126705 |
Fix information
Fixed component name
TIV WRKLD SCHD
Fixed component ID
5697WSZ01
Applicable component levels
R300 PSY UK63713
UP11/04/19 P F104
R302 PSY UK63743
UP11/04/19 P F104
R500 PSY UK63714
UP11/04/19 P F104
R502 PSY UK63744
UP11/04/19 P F104
R510 PSY UK63715
UP11/04/19 P F104
R512 PSY UK63745
UP11/04/19 P F104
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:
02 May 2011