A fix is available
APAR status
Closed as program error.
Error description
When a guest is logged off it's PGMBKs need to be read in. If the guest is large there is a potential for many PGMBKs being read in. The single threaded process of reading in these PGMBKs by system can take a long time, delaying other guests from running.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All z/VM users. * **************************************************************** * PROBLEM DESCRIPTION: * **************************************************************** * RECOMMENDATION: APPLY PTF * **************************************************************** Performance delays in system-reset clear operations (including logoff) caused by single-threaded read operations for paged-out PGMBKs.
Problem conclusion
A batched read prefetch has been implemented for pageable PGMBKs to increase the likelihood a PGMBK is in real storage before it is needed by release processing.
Temporary fix
FOR RELEASE VM/ESA CP/ESA R630 : PREREQ: VM65583 VM65352 VM65391 VM65586 VM64587 CO-REQ: NONE IF-REQ: NONE
Comments
×**** PE15/11/09 FIX IN ERROR. SEE APAR VM65097 FOR DESCRIPTION
APAR Information
APAR number
VM64770
Reported component name
VM CP
Reported component ID
568411202
Reported release
630
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2015-04-30
Closed date
2015-09-08
Last modified date
2016-03-30
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UM34582
Modules/Macros
CBITABLE CPLOAD HCPALD HCPASCBK HCPCBI HCPHAM HCPHDI HCPHDPBK HCPHPH HCPHRM HCPHRU HCPITRBK HCPMDLAT HCPMOT HCPOM1 HCPPAG HCPPFP HCPPFPRQ HCPPPI HCPPPIBK HCPPTE HCPPTF HCPRSM HCPRSMBK HCPSXU MRSTORSG
Fix information
Fixed component name
VM CP
Fixed component ID
568411202
Applicable component levels
R630 PSY UM34582
UP16/03/30 P 1601
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:
30 March 2016