On Mon, 6 Jan 2014 12:44:42 -0500, Rob Schramm rob.schr...@gmail.com wrote:
Does it really matter as much as it used to? The amount of cache on a dasd
subsystem and overall i/o seems more relevant for paging spikes. Not that
i am advocating a complete dismissal of all the normal
@LISTSERV.UA.EDU] On Behalf Of Art Gutowski
Sent: Friday, January 03, 2014 10:09 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: [IBM-MAIN] Local Page dataset sizing/quantity ROT?
Yes, how to maximize parallelism is the pertinent question.
Let's assume for the sake of argument, DS88xx
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: [IBM-MAIN] Local Page dataset sizing/quantity ROT?
Does it really matter as much as it used to? The amount of cache on a
dasd
subsystem and overall i/o seems more relevant for paging spikes. Not
that
i
am advocating a complete dismissal of all
Art,
You are asking the questions so much better than I thanks.
-Original Message-
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf
Of Art Gutowski
Sent: Friday, January 03, 2014 1:09 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Local Page dataset
or external storage when they
suddenly get busy.
Ron
-Original Message-
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU]
On Behalf Of Art Gutowski
Sent: Friday, January 03, 2014 10:09 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: [IBM-MAIN] Local Page dataset
Determine virtual storage to be backed. Virtual to real (for that LPAR) no
greater than 3:1. This can be done by estimation or looking at RMF.
Allocate sufficient local page slots such that no single local page DS has more
than 30% of slots in use.
Spread these slots over and many devices/paths
-MAIN@LISTSERV.UA.EDU
Subject: Re: Local Page dataset sizing/quantity ROT?
Determine virtual storage to be backed. Virtual to real (for that LPAR)
no greater than 3:1. This can be done by estimation or looking at RMF.
Allocate sufficient local page slots such that no single local page DS
has more
Agreed
-Original Message-
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf
Of Vernooij, CP - SPLXM
Sent: Thursday, January 02, 2014 8:29 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Local Page dataset sizing/quantity ROT?
One additional precaution measure
: Re: Local Page dataset sizing/quantity ROT?
I, too, have been watching this thread with interest. I read much on overall
sizing, but little on individual page dataset sizing or count (quantity). I
have perused past posts where those particulars have been discussed, but am
curious as to whether
I, too, have been watching this thread with interest. I read much on overall
sizing, but little on individual page dataset sizing or count (quantity). I
have perused past posts where those particulars have been discussed, but am
curious as to whether any new experiences has lead folks to
@LISTSERV.UA.EDU] On Behalf
Of Ron Hawkins
Sent: Thursday, December 26, 2013 3:44 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Local Page dataset sizing/quantity ROT?
David,
Perhaps with a different twist, what problems are you trying to prevent :-)
I wouldn't go to the level of Controller separation
On Thu, 26 Dec 2013 18:14:27 +, Jousma, David david.jou...@53.com wrote:
You are being a little tough on me today.
No, I'm just trying to help. ;-) (I have helped in the past with our DB2
performance issues. That was traced down to bad programming practises which
gobbled up our paging
I have been watching this discussion with interest.
For a short time I was a sysprog at a place that had DB2 and had one
small occurrence of page shortage due to a DB2 taking a dump. I asked
around and this as the first in anyones memory.
I thought for accuracy's sake I would run through a
page datasets on them, just in case...
Happy New Year!
zNorman
-Original Message-
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf
Of Elardus Engelbrecht
Sent: Friday, December 27, 2013 2:58 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Local Page dataset
Just push the Easy button? Unfortunately it's not located in easily
accessible location.
1)Hardware config WRT CPUs, CoD, Storage, ZIIPs, DASD, SSD
2)Software config WRT to Buffer use. Limiting non-production resources with
throttles.
3)Craig Mullin's DB/2 book is a good starting place.
All,
Hope everyone had a good holiday. Just looking at doing a little
housecleaning.Haven't visited Local page dataset's since 2006. In general
we don't page much, and if we do it usually because there is a problem, or
someone is doing something they probably shouldn't. MVS Init and
Jousma, David wrote:
Hope everyone had a good holiday.
What holiday? I don't see any holiday! ;-D ;-D ;-D ;-D
Today we have a roughly 36GB of LOCAL page for each system, that was setup in
2006 spread across 4 mod-9's. Back then we didn't have the amount of memory
on the processors that we
@LISTSERV.UA.EDU
Subject: Re: Local Page dataset sizing/quantity ROT?
Jousma, David wrote:
Hope everyone had a good holiday.
What holiday? I don't see any holiday! ;-D ;-D ;-D ;-D Ouch.
Today we have a roughly 36GB of LOCAL page for each system, that was setup in
2006 spread across 4 mod-9's. Back
[mailto:IBM-MAIN@LISTSERV.UA.EDU]
On Behalf Of Jousma, David
Sent: Thursday, December 26, 2013 10:14 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: [IBM-MAIN] Local Page dataset sizing/quantity ROT?
Elardus,
You are being a little tough on me today. Maybe your summer is too warm?
;)
See below
that’s not necessarily the case.
-Original Message-
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf
Of Ron Hawkins
Sent: Thursday, December 26, 2013 3:44 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Local Page dataset sizing/quantity ROT?
David,
Perhaps
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