to x86 in 2020 (as if the
mainframe hasn't changed). Sorry I don't have better pointers.
Regards,
Bill
___
Bill Bitner - z/VM Customer Focus and Care - 607-429-3286
bitn...@us.ibm.com
"Making systems prac
r IBM as far as they know"
_______
Bill Bitner - z/VM Customer Focus and Care - 607-429-3286
bitn...@us.ibm.com
"Making systems practical and profitable for customers through
virtualization and its exploi
Larry,
If this isn't resolved, I'd suggest you open a z/VM support case and the
team and take a closer look.
Thanks,
Bill
___
Bill Bitner - z/VM Client Focus and Care - 607-429-3286
bitn...@us.ibm.com
"M
M66215)
that will surface some other counters related to processor usage in SMT-2
environment.
I hope that helps. That URL will give some more details.
_______
Bill Bitner - z/VM Client Focus and Care - 607-429-3
terpreting the data.
Regards,
Bill
_______
Bill Bitner - z/VM Client Focus and Care - 607-429-3286
bitn...@us.ibm.com
"Making systems practical and profitable for customers through
virtualization and its exploi
to see if others had interest. Thanks everyone. You can reply here
or email bitn...@us.ibm.com.
Regards,
Bill
___
Bill Bitner - z/VM Client Focus and Care - 607-429-3286
bitn...@us.ibm.com
"Making systems prac
There have been different things discussed, though I don't recall if
guarded storage facility was one of them (actually introduced in z14) as
that came out after we did the initial LGR.
___
Bill Bitner - z/VM
___
Bill Bitner - z/VM Client Focus and Care - 607-429-3286
bitn...@us.ibm.com
"Making systems practical and profitable for customers through
virtualization and its exploitation." - z/VM
From:
that LVC there were updates to Performance Toolkit that can show some
of the statistics on LGR (or in other z/VM Performance products).
___
Bill Bitner - z/VM Client Focus and Care - 607-429-3286
bitn...@us.ibm.com
Oops
___
Bill Bitner - z/VM Client Focus and Care - 607-429-3286
bitn...@us.ibm.com
"Making systems practical and profitable for customers through
virtualization and its exploitation.&qu
___
Bill Bitner - z/VM Client Focus and Care - 607-429-3286
bitn...@us.ibm.com
"Making systems practical and profitable for customers through
virtualization and its exploitation." - z/VM
From: Andreas Krebbel
To: LINUX-390@VM.MARIST.EDU
Date: 07/22/2020 07:49
ols page
https://www.youtube.com/channel/UCwHDyL91yiybsY71dwQpveg - VM Workshop
YouTube channel for z/VM, Linux, and z/VSE
___
Bill Bitner - z/VM Client Focus and Care - 607-429-3286
bitn...@us.ibm.com
&quo
there in the future. Contact Carlos Afonso (carlo...@br.ibm.com) if
you are not already on his list for the Linux on LinuxONE workshops he
organizes.
Regards,
Bill
___
Bill Bitner - z/VM Client Focus and Care - 607-429
___
Bill Bitner - z/VM Client Focus and Care - 607-429-3286
bitn...@us.ibm.com
"Making systems practical and profitable for customers through
virtualization and its exploitation." - z/VM
--
For
to offer their experiences.
___
Bill Bitner - z/VM Client Focus and Care - 607-429-3286
bitn...@us.ibm.com
"Making systems practical and profitable for customers through
virtualization and its exploitation.
CMD TRACE PROG 28 NOTERM NOPRINT RUN
I apologize for giving both of us a fright and for those following along.
Regards,
Bill
_______
Bill Bitner - z/VM Customer Focus and Care - 607-429-3286
bitn...@us.ibm.com
"
___
Bill Bitner - z/VM Customer Focus and Care - 607-429-3286
bitn...@us.ibm.com
"Making systems practical and profitable for customers through
virtualization and its exploitation.&qu
___
Bill Bitner - z/VM Customer Focus and Care - 607-429-3286
bitn...@us.ibm.com
"Making systems practical and profitable for customers through
virtualization and its exploitation." - z/VM
--
For
Rick, if you have VM65396 on, but not VM65414, that would be my guess.
VM65414 corrected a problem introduced by VM65396 where a guest could
erroneously be given a program check 28.
___
Bill Bitner - z/VM
I believe in Velocity it is the ESAXACT report.
___
Bill Bitner - z/VM Customer Focus and Care - 607-429-3286
bitn...@us.ibm.com
"Making systems practical and profitable for customers through
virtualiz
See the fourth item on this page:
http://www.vm.ibm.com/perf/tips/prgcom.html
___
Bill Bitner - z/VM Customer Focus and Care - 607-429-3286
bitn...@us.ibm.com
"Making systems practical and profi
Hello folks, sorry, but you know the drill. This kind of information is
shared only through the IBM Z Security Portal. If you're unfamiliar with it
or how to sign up, this was covered in part of the Live Virtual Class on
October 18, 2017 that Brian Hugenbruch did.
Take a look at the 4th entry on this page -
http://www.vm.ibm.com/perf/tips/prgcom.html
Regards, Bill Bitner
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For LINUX-390 subscribe / signoff / archive access instructions,
send email to lists...@vm.marist.edu
to z/VM 6.4, you can contact Bill Bitner (bitn...@us.ibm.com).
Various options exist:
Extended support contracts for z/VM 6.3
IBM Lab Services for additional temporary skills
Also remember that z/VM 6.4 introduced a new architecture level set,
requiring a z196 or z114 or higher machine.
Tell
Posting for Marcel Mitran:
Please take a few minutes to fill in the following Java on z survey, and feel
free to forward
to others who may be interested, or have insight.
Link: https://ibm.biz/java_on_z
Survey: z Systems software values your feedback!
Audience: Anyone who has been
where
those unsupported Linux guests no longer run.
Keep Calm and Stay Current
Bill Bitner
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send email to lists...@vm.marist.edu with the message: INFO LINUX-390
A paper I've recommended particularly to address why System z
virtualization vs. other platforms is:
http://public.dhe.ibm.com/common/ssi/ecm/en/zsl03192usen/ZSL03192USEN.PDF
Bill Bitner - z/VM Customer Focus and Care - IBM Endicott - 607-429-3286
The postings on this site are my own and don't
vendor
supplied predictive capability focusing on future performance issues. Customers
can change values and play what if type of scenarios.
All in all, you get real-time performance analysis, custom reporting, and
predictive analysis in one tool.
Bill Bitner
level information, it does provide a Linux view
of some important metrics. It is also very low overhead.
Additionally, OMEGAMON XE for z/VM and Linux provides both the z/VM
and the Linux agents. Perhaps not the first choice for a PoC, but
wanted to mention for completeness.
Bill Bitner - z/VM
You'll find additional data on Reorder Processing at
http://www.vm.ibm.com/perf/tips/reorder.html
Feel free to contact me if you have other questions or want
to discuss a particular scenario.
Bill Bitner - z/VM Customer Focus and Care - IBM Endicott - 607-429-3286
The postings on this site
Hello Barry if you are using traditional PAV, you should not see any
activity in Domain 6 Record 28. That record only includes activity
associated with HyperPAV. Fields of interest to traditional PAV would
be Domain 6 Record 3, such as:
IODDEV_PAVINELIG
IODDEV_PAVUSES
IODDEV_RDEVPVFG
Regards,
are wrong
for 99% of the environments.
Sorry, my failure to get changes made there.
Bill Bitner - z/VM Customer Focus and Care - IBM Endicott - 607-429-3286
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. This is interesting for systems on
larger n-ways that want to reduce z/VM and LPAR overhead.
Bill Bitner
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send email to lists...@vm.marist.edu with the message: INFO LINUX-390
something around a peak of 900 MB/Sec for streaming
workloads with multiple sessions; 600 MB/Sec for streaming with
single session. That was with jumbo frames on MTU.
Bill Bitner
IBM z/VM Customer Focus and Care
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transactions.
Regards,
Bill Bitner
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For LINUX-390 subscribe / signoff / archive access instructions,
send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit
http://www.marist.edu/htbin/wlvindex?LINUX-390
.
To avoid confusion, the changes with VM64721 for the SET SHARE
command do not affect Limitsoft (and were not inteded to do so).
However, VM64721 does affect Limithard, but only when turned on
via SET SRM LIMITHARD CONSUMPTION command.
(SET SRM LIMITHARD DEADLINE is the default)
Bill Bitner - VM
today. This is on my agenda.
So again, I apologize if it appears we have been ignoring
this aspect of the system. I'm probably as much to blame as
anyone. I'll try to make it right.
Regards, Bill Bitner
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For LINUX-390
there are methods to normalize the old accounting information,
it is still subject to some misleading in that the old method is exposed
to skewing of time towards buckets.
Bill Bitner - VM Performance Evaluation - IBM Endicott - 607-429-3286
they could be created without the
actual virtual disk block being referenced. Like I said, it's not a
bad idea, I just don't want anyone who's not on 5.3.0 to be caught
by surprise.
Bill Bitner - VM Performance Evaluation - IBM Endicott - 607-429-3286
required below 2GB for the DAT structures. One would
want to be on z/VM 5.3.0. The PGMBKs are not reflected in the PTRM
numbers.
Bill Bitner - VM Performance Evaluation - IBM Endicott - 607-429-3286
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across different OSAs with load balancing.
The z/VM Performance Report has additional details:
http://www.vm.ibm.com/perf/reports/zvm/html/linkagg.html
Regards,
Bill Bitner
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For LINUX-390 subscribe / signoff / archive access
historical
collection as well. Unfortunately I don't know the details.
I hope that helps.
Bill Bitner
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send email to [EMAIL PROTECTED] with the message: INFO LINUX-390
Rob is correct it does say 'it depends', but gives one of the
dependencies - processor time. The report also mentions that there
are other considerations (trade-offs) such as performance
information being reported (as Barton mentioned). Also, you
need to consider: backup/recovery,
be moved in a single I/O command
Workloads are impacted differently by the above. There
are also a number of non-performance related
differences.
Bill Bitner - VM Performance Evaluation - IBM Endicott - 607-429-3286
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of that memory.
Bill Bitner - VM Performance Evaluation - IBM Endicott - 607-429-3286
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http
Dedicated DASD are not eligible for VM's minidisk cache.
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here because of
exits for SIEs done under the three levels, but it could also be
influenced by CPU bound work or work that naturally has low level
of interrupts.
Bill Bitner - VM Performance Evaluation - IBM Endicott - 607-429-3286
of workloads. HiperSockets and Shared OSA would
also require more locked memory than Guest LAN or Virtual Switch.
See http://www.vm.ibm.com/perf/reports/zvm/html/
for detailed measurements.
Bill Bitner - VM Performance Evaluation - IBM Endicott - 607-429-3286
applications, and back-up processing. Though, there are
always exceptions.
Other information may be found at
http://www.vm.ibm.com/perf/tips/prgmdcar.html
Bill Bitner - VM Performance Evaluation - IBM Endicott - 607-429-3286
supports both the RMFPMS interface and the new
kernel appldata interface. I don't recall seeing a requirement for
the SNMP. But if folks are interested, let us know. If there is
enough interest, we would consider it.
Bill Bitner - VM Performance Evaluation - IBM Endicott - 607-429-3286VP
support for
minidisks and CP
volumes, feel free to blame me; but be nice, my Mom my manager might be
reading this.
For those that want to discuss their systems and choices, feel free to contact
me.
I'll respond as time permits. :-)
Bill Bitner - VM Performance Evaluation - IBM Endicott - 607-429
be set in directory) that you might want to
be familiar with is CP SET RESERVE to give some
favoritism of memory for a guest. I haven't seen
it needed in many Linux z/VM environments, but it
is worth knowing about it.
Bill Bitner - VM Performance Evaluation - IBM Endicott - 607-429-3286
See http://awlinux1.alphaworks.ibm.com/developerworks/linux390/perf/index.shtml
(note this is a temporary link. I have http://www.ibm.com/developerworks/linux/
bookmarked.).
Bill Bitner - VM Performance Evaluation - IBM Endicott - 607-429-3286
.software.ibm.com/developerworks/opensource/linux390/perf/tuning_rec_dasd_PAV.shtml#begin
for details.
Bill Bitner - VM Performance Evaluation - IBM Endicott - 607-429-3286
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If one runs under VM, you can use PAV with Linux. See
Of course I should have included, this applies only to devices that
support PAV, which I do not believe the RVA does.
Bill Bitner - VM Performance Evaluation - IBM Endicott - 607-429-3286
'44' actually is of benefit.
I expect the trade off is slightly worse performance for all commands
all the time, but a new safety net to avoid lock outs from long running
tasks.
I would be very interested in hearing what you see.
Bill Bitner - VM Performance Evaluation - IBM Endicott - 607-429-3286
a fair amount on a single IFL. However, you'll
need to be aware of the potential to lock out end users for periods of
time due to these background tasks.
Bill Bitner - VM Performance Evaluation - IBM Endicott - 607-429-3286
to clarify. QUICKDSP does not disable the
scheduler's ability to effectively set priorities based
on Share settings.
Bill Bitner - VM Performance Evaluation - IBM Endicott - 607-429-3286
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below 2GB. So it won't be an
acceptable alternative in all cases.
5.The swapping itself can occur without VM intervention, except
for the creation and when required the actual paging of the
DCSS (that's VM paging, not Linux).
Bill Bitner - VM Performance Evaluation - IBM Endicott - 607-429
There is no significant change in z/VM 5.1.0 that addresses this
particular situation, but I should update the web page I pointed
to earlier to reflect that. Les posted the SOD, which is about
all I should say.
If there are additional changes in the service stream, I'll do
my best to let you know
*may* need to process. It depends.
Bill Bitner - VM Performance Evaluation - IBM Endicott - 607-429-3286
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at these pages were not associated with any particular guests.
Bill Bitner - VM Performance Evaluation - IBM Endicott - 607-429-3286
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of the virtual machine being held in the eligible
list because the scheduler feels that to run the virtual
machine, it would overload system resources.
See also
http://www.vm.ibm.com/perf/tips/linuxper.html
for some discussion on this and links to other info.
Bill Bitner - VM Performance Evaluation
the Dell system is also use ext3. If not that would make a
difference. Also, the comparison is a little different because of
using Ficon instead of FCP SCSI.
However, all in all, I have seen other measurements with similar
results, particularly for a single guest with a single disk.
Bill Bitner - VM
is basically linear up to the maximum of 64
for a given virtual machine (though defining more virtual processors
than real processors will not be of any benefit and may just add
overhead).
Bill Bitner - VM Performance Evaluation - IBM Endicott 607-752-6022
Internet: [EMAIL PROTECTED]
Home Page: http
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