An earlier append (properly) berated IBM for not providing SMF information
about 2G usage.
We have every intention of addressing that in the near future.
Peter Relson
z/OS Core Technology Design
--
For IBM-MAIN subscribe /
In a message dated 11/9/2005 6:36:25 A.M. Central Standard Time,
[EMAIL PROTECTED] writes:
We have every intention of addressing that in the near future.
Mark and Roland did it about 4 hours(with a couple of snags
and enhancements thrown in). If you can't measure it, you can't
If you can't measure it, you can't tune it.
...
The original quote was more general:
“If you can't measure it, you can't manage it”.
“Tuning” is just one aspect of “Managing”.
-teD
Me? A skeptic? I trust you have proof!
--
From: Peter Relson
Time to enflame the waters...
I've been away for a couple of days. Seems this didn't even register a bite.
Time for me to rectify that oversight.
There is absolutely nothing wrong, incorrect, improper, or unexpected
about
any system space (GRS) using as much memory above
I am differentiating GRS from DB2 in this regard.
One thing to remember: DB2 is already (in most shops) using HIPERPOOLs (even in
64-bit mode).
What V8 will do is move all of those into its own adress space.
So, you are alread back-stored in AUX.
What the issue is, what happens when the DBA
Folks,
I had some time this morning and updated my tool to also show shared
memory objects for z/OS 1.5 and above. I've renamed it to RXSTOR64.
You can get RXSTOR64 at my web site in the EXECs/CLIST section or by
downloading the TSO XMIT format file:
http://home.flash.net/~mzelden/mvsutil.html
Subject:Re: MEMLIMIT and IEFUSI
If anyone (including vendors)actually has shared memory objects, I'd
appreciate you trying this out and letting me know if it actually works. :-)
LEGAL DISCLAIMER
The information transmitted is intended solely for the individual or entity to
which
Richards.Bob wrote:
Mark,
It does work:
BROWSE Mark's MVS Utilities - RXSTOR64 Tasks found with objects
Command === Scroll === HALF
Top of Data **
6 4
On Fri, 4 Nov 2005 14:00:27 -0500, Richards.Bob [EMAIL PROTECTED]
wrote:
Mark,
It does work:
SHARE SHARE SHARE
# OBJ ALLOCHWM
- -- --
0 0M 0M
I know the private stuff works. I'm looking for someone who can
test shared memory objects.
Mark,
We should all be thanking you for all you've done on the list.
I went out to your web site and found myself in the pool area and checking
out your family. You seemingly have a lot to be grateful for. I also
appreciate all the help you have given me over time. You seem to be a real
-Original Message-
From: IBM Mainframe Discussion List
[mailto:[EMAIL PROTECTED] On Behalf Of Mark Zelden
Sent: Friday, November 04, 2005 11:50 AM
To: IBM-MAIN@BAMA.UA.EDU
Subject: Re: MEMLIMIT and IEFUSI
Folks,
I had some time this morning and updated my tool to also show
, 2005 2:03 PM
To: IBM-MAIN@BAMA.UA.EDU
Subject:Re: MEMLIMIT and IEFUSI
Richards.Bob wrote:
Mark,
It does work:
BROWSE Mark's MVS Utilities - RXSTOR64 Tasks found with objects
Command === Scroll === HALF
On Fri, 4 Nov 2005 23:01:39 +1000, ibm-main [EMAIL PROTECTED] wrote:
There is absolutely nothing wrong, incorrect, improper, or unexpected
about
any system space (GRS) using as much memory above 2G as it wants,
provided
that it has documented that use so that customers can properly plan.
Note
Time to enflame the waters...
There is absolutely nothing wrong, incorrect, improper, or unexpected about
any system space (GRS) using as much memory above 2G as it wants, provided
that it has documented that use so that customers can properly plan. Note
that I am differentiating GRS from DB2 in
If the system needs the storage to do its job, then it needs the storage
(emphasis on needs).
And all that you would do is break the system by trying to impose a limit where
none should be imposed.
...
Peter,
A very valid point.
And, in DB2's, case it was not a secret.
And, it is “needed”;
On 11/2/2005 7:57 AM, Barbara Nitz wrote:
Doubting what
showzos told me, I took a dump, learned a new IPCS command and found that
59 frames are used, 3300 are on AUX, more than 112000 are FREF (meaning
getmained but unused) and 408000 are in the guard area.
I don't think you actually have any
what is showzos and what ipcs command did you use.
Walt Farrell [EMAIL PROTECTED]
Sent by: IBM Mainframe Discussion List IBM-MAIN@bama.ua.edu
11/03/2005 12:05 PM
Please respond to
IBM Mainframe Discussion List IBM-MAIN@bama.ua.edu
To
IBM-MAIN@bama.ua.edu
cc
Subject
Re: MEMLIMIT and IEFUSI
- Original Message -
From: Craddock, Chris [EMAIL PROTECTED]
Newsgroups: bit.listserv.ibm-main
Sent: Wednesday, November 02, 2005 10:04 PM
Subject: RE: MEMLIMIT and IEFUSI
/snippage/
So you're going to modify the IEFUSI exit for each needed change,
reassemble it and activate
Message-
From: IBM Mainframe Discussion List
[mailto:[EMAIL PROTECTED] On Behalf Of Anthony Bongiorno
Sent: Thursday, November 03, 2005 7:07 PM
To: IBM-MAIN@BAMA.UA.EDU
Subject: Re: MEMLIMIT and IEFUSI and GRS
what is showzos and what ipcs command did you use
If IBM was worried about customers not changing the MEMLIMIT=0 default,
why didn't they just code REGION=0M.
Because then we would come and say that REGION=0 doesn't automatically give
them a NOLIMIT (We have hysterically grown just about all and sundry on
region=0M and nobody dares to take that
On my 1.4 system, I didn't have any exploiters - not GRS, not nobody (me
excepted of course). Got sick of all the zeroes, so hacked them out - then I
needed a message to say nothing to display ...
*then* I needed a parm to allow me to display them all if I wanted to ...
:o)
And, of course, common
Well, I just ran Rolands new showzos on both z/OS 1.4 and 1.6.
For 1.4, all is well with the world (except for what we already knew and
IRLM also hardcodes the memlim with 2GB).
In 1.6, not only does GRS overwrite the MEMLIMIT with 64PB, it also has 4
objects allocated above the bar with 19GB
There are potential disasters around every corner in life. Most of
them
are avoidable through prudent planning. This is just another of
those.
No, it isn't. Since someone else is taking control away from me, I
cannot
plan at all or rather, I have to plan for desaster. Your attitude
makes me
On Wed, 2 Nov 2005 13:57:07 +0100, Barbara Nitz [EMAIL PROTECTED] wrote:
For 1.4, all is well with the world (except for what we already knew and
IRLM also hardcodes the memlim with 2GB).
Here is what my testing told me:
DBM1 gets 4T no matter what (unless it can get MEMLIMIT=NOLIMIT via
In
[EMAIL PROTECTED],
on 11/02/2005
at 08:03 AM, Craddock, Chris [EMAIL PROTECTED] said:
Right now there are too many conflicting points of control in z/OS.
The DB2 designers have chosen to remove what might otherwise be a
hidden limit (the MEMLIMIT) and in doing so they have given control
On Wed, 2 Nov 2005 11:24:32 +1000, Shane Ginnane [EMAIL PROTECTED]
wrote:
Mark, you might want to include these in the code rather than a comment.
I assigned them to a stem, and used that in the display, using RAXLVMEMLIMS
as the stem index. Knock some blanks out of the display line, and you're a
: Wednesday, November 02, 2005 10:57 AM
To: IBM-MAIN@BAMA.UA.EDU
Subject:Re: MEMLIMIT and IEFUSI
On Wed, 2 Nov 2005 11:24:32 +1000, Shane Ginnane [EMAIL PROTECTED]
wrote:
Mark, you might want to include these in the code rather than a comment.
I assigned them to a stem, and used
On Wed, 2 Nov 2005 08:03:48 -0600, Craddock, Chris answered Barbara wwho
said:
No, it isn't. Since someone else is taking control away from me, I
cannot plan at all or rather, I have to plan for desaster. Your attitude
makes me think that some BMC products probably do the same - overwrite
without
Right now there are too many conflicting points of control in z/OS. The
DB2 designers have chosen to remove what might otherwise be a hidden
limit (the MEMLIMIT) and in doing so they have given control over (and
responsibility for) storage management to those who, in theory,
understand the
D VS,HVSHARE
IAR019I 13.22.57 DISPLAY VIRTSTOR 258
SOURCE = DEFAULT
TOTAL SHARED = 522240G
SHARED RANGE = 2048G-524288G
SHARED ALLOCATED = 0M
Now if only TCP/IP, VTAM, and IMS
And taken the control away from those who understand how to keep the
system up. A crashed system does not contribute to achieving business
goals.
...
Nor does a database system failing because some SYSPROG refusing to change
things.
Both sides of the argument have some merit.
But, business
On 2 Nov 2005 06:04:01 -0800, in bit.listserv.ibm-main
(Message-ID:[EMAIL PROTECTED])
[EMAIL PROTECTED] (Craddock, Chris) wrote:
Based on direct personal experience of both sides of this,
I would argue
that removing artificial limits that -will- bite you at
bad times and
striving to manage
Now, the sysprog is out of the loop
...
That is the problem!
NOT, that IBM broke the rules!
Rather, why is the SYSPROG out of the loop?
I have never worked that way (or, at least, for long).
The Capacity Analyst, Performance Analyst, DBA, SYSPROG, (gasp) the
Application Programmer should all
If GRS has a memory leak but it's still working I want
it to keep working till I IPL
...
BINGO!!
-teD
In God we Trust!
All others bring data!
-- W. Edwards Deming
--
For IBM-MAIN subscribe / signoff / archive access
On Wed, 2 Nov 2005 16:37:43 -0500, Knutson, Sam [EMAIL PROTECTED] wrote:
Just a consideration that some tasks that make up the z/OS core services
really probably should be exempt from exits intended to impose limits on
user programs. I agree it probably should be submitted as an RCF
against
DB2 is still just an application running on the OS, so your point
doesn't apply there.
...
It's more than just an application.
It is a sub-system that has always used CPU and Memory to reduce I/O (the
longest portion of any response event).
Now, with V8 and 64-bit we have the potential to
, 2005 1:00 AM
To: IBM-MAIN@BAMA.UA.EDU
Subject: Re: MEMLIMIT and IEFUSI
Now, the sysprog is out of the loop
...
That is the problem!
NOT, that IBM broke the rules!
Rather, why is the SYSPROG out of the loop?
I have never worked that way (or, at least, for long).
The Capacity Analyst, Performance
so why the hell introduced IBM an exit like IEFUSI? There must be an reason in
the past
and in the future. It's not because of missing planing, communication and so on.
It's just to ensure the health of operating system in case of ..
...
There are two kinds of fallacies:
1. This is old,
the issue
and the reason. Of course sometimes it's hard to speak the same language.
Roland
-Original Message-
From: IBM Mainframe Discussion List
[mailto:[EMAIL PROTECTED] On Behalf Of Ted MacNEIL
Sent: Wednesday, November 02, 2005 1:00 AM
To: IBM-MAIN@BAMA.UA.EDU
Subject: Re: MEMLIMIT
If the sysprog is out of the loop then an IEFUSI,SMF parm or JES limit will
bring them
automaticly in the loop.
...
Horse?
Barn door?
So this just help to force the sysprog as a partner.
...
Buz! Wrong answer!
Thank you for playing.
This is an approach to a disaster.
NOT, a sound business
Tom wrote on 03/11/2005 02:36:06 AM:
They missed a very large portion of the puzzle, Chris: Aux.
IF the DB2 and z/OS designers had ALSO implemented private paging for
the
(ab)users of virtual storage (like DB2 and perhaps GRS) then they would
have moved all of the controls over to the
why the hell introduced IBM an exit like IEFUSI? There must be an
reason It's not because of missing planing, communication and
so on. It's just to ensure the health of operating system in case
of ..
Back in the day... the world was much less complex than today.
Workloads were basically
The current maximum size of a page data set is 4GB, making the maximum
local paging space 253 * 4GB, which is a little less than 1TB (and
considerably less than 4TB).
IMHO, that makes a hardcoded default of 4T (with the potential of it really
getting used) so much more ridiculous.
By way of a
On Tue, 1 Nov 2005 09:18:42 +0100, Barbara Nitz [EMAIL PROTECTED] wrote:
And now that I have gotten the good idea to write my own monitor to show me
who is using storage above the bar, I still wonder why RMF for 1.6 doesn't
show this.
Barbara,
Please get your company to agree to your donating
In a message dated 11/1/2005 5:40:30 A.M. Central Standard Time,
[EMAIL PROTECTED] writes:
Please get your company to agree to your donating this code to the CBT tape.
Truly, guess I'm curious as why not report a big honkin' defect?
Please get your company to agree to your donating this code to the CBT
tape.
That shouldn't be a problem - we're using stuff from the cbttape ourselves.
And I had intended to donate, anyway.
Maybe Roland will be faster having this display in ShowZOS, though
Regards, Barbara
--
Lust, ein
Truly, guess I'm curious as why not report a big honkin' defect?
It is sort of documented that DB2 doesn't honour IEFUSI - not spelled out in
brutal clarity and worded very carefully, but the DB2 apar says that they
don't honour memlimits below 4TB. So I don't see that reporting a 'defect'
has
Hmmmh.. I believe Mark Zelden Rexx code will be faster.
Roland
Please get your company to agree to your donating this code to the CBT
tape.
That shouldn't be a problem - we're using stuff from the cbttape ourselves.
And I had intended to donate, anyway.
Maybe Roland will be faster
In a message dated 11/1/2005 7:23:10 A.M. Central Standard Time,
[EMAIL PROTECTED] writes:
So I better spend my time writing my monitor program to get alerted once
things go downhill than spend the energy to argue with IBM. I'll leave that
to the SHARE memebrs - maybe a topic for the next
Agreed - for a one-off display, it probably fits better in IPLINFO than
ShowZos.
I almost knocked up something to send to Mark today, but got way-laid by
real work :o)
For a SMF data logging requirement, perhaps Barbaras solution is better.
Of course if IBM would get off it's collective
is clearly wrong because DB2 doesn't play by the rules outlined
there.
My guess is that IBM will change the Ext Addr Guide. :-(
I guess GRS should be documented as bypassing IEFUSI too. Its MEMLIMIT
is 64PB. Hope there are no future bugs with GRS 64-bit storage usage
either.
If IBM was worried
On Tue, 1 Nov 2005 09:18:42 +0100, Barbara Nitz wrote:
The current maximum size of a page data set is 4GB, making the maximum
local paging space 253 * 4GB, which is a little less than 1TB (and
considerably less than 4TB).
IMHO, that makes a hardcoded default of 4T (with the potential of it
On Tue, 1 Nov 2005 14:23:20 +0100, Roland Schiradin [EMAIL PROTECTED]
wrote:
Hmmmh.. I believe Mark Zelden Rexx code will be faster.
Roland
Roland took a couple of my other programs and modified them into
something to show MEMLIMIT and 64-bit usage for all address spaces.
I'm cleaning it up a
In a message dated 11/1/2005 8:29:21 A.M. Central Standard Time,
[EMAIL PROTECTED] writes:
is POSSIBLE for a z/OS 1.7 system. DB2 V8 is clearly broken by
thoughtless design.
Maybe they're putting into effect what Ray Wicks(circa 1991) described as
'current modeling uses infinite
-Original Message-
From: IBM Mainframe Discussion List
[mailto:[EMAIL PROTECTED] On Behalf Of Ed Finnell
Sent: Tuesday, November 01, 2005 9:00 AM
To: IBM-MAIN@BAMA.UA.EDU
Subject: Re: MEMLIMIT and IEFUSI
In a message dated 11/1/2005 8:29:21 A.M. Central Standard Time
On Oct 31, 2005, at 11:16 PM, Craddock, Chris wrote:
SNIP good info---
Other than the unarguable truth that above the bar is a really big
place, why are we obsessing about it?
CC
Chris:
I am not a DB2 person, but it would seem reasonable to me that IBM
:[EMAIL PROTECTED] On Behalf
Of Barbara Nitz
Sent: Tuesday, November 01, 2005 2:19 AM
To: IBM-MAIN@BAMA.UA.EDU
Subject: Re: MEMLIMIT and IEFUSI
The current maximum size of a page data set is 4GB, making the maximum
local paging space 253 * 4GB, which is a little less than 1TB (and
considerably less
In [EMAIL PROTECTED],
on 10/28/2005
at 12:00 AM, Ted MacNEIL [EMAIL PROTECTED] said:
Possibly, but I don't think so.I was probably over-reacting.We don't
implement a 4TB system overnight.We plan and understand (sometimes on
both points)
K3wl. What do you do when someone fails to plan? The
In [EMAIL PROTECTED], on 10/31/2005
at 09:00 AM, Barbara Nitz [EMAIL PROTECTED] said:
My space admin tells me that to support additional 4TB of paging
config I would need 360 additional mod3 volumes.
Why mod3? Why not max sized[1] custom volumes.
[1] Max sized for paging use; still smaller
.
-Original Message-
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf
Of Barbara Nitz
Sent: Tuesday, November 01, 2005 7:23 AM
To: IBM-MAIN@BAMA.UA.EDU
Subject: Re: MEMLIMIT and IEFUSI
Truly, guess I'm curious as why not report a big honkin' defect?
It is sort of documented
On Tue, 1 Nov 2005 09:14:17 -0600 McKown, John [EMAIL PROTECTED]
wrote:
:That's how our people design. They ASSuME infinite wall clock time,
:infinite CPU cycles, infinite DASD space, 0 milliseconds to mount a
:tape, etc.
If you assume infinite wall clock time, why would you care how fast a tape
I am not a DB2 person, but it would seem reasonable to me that IBM
should(in the documentation) make it clear that there are *NEW* major
requirements for DB2 (and what the new requirements are), so the
appropriate people can make the adjustments necessary.
A few people seem to be piling on
On Tue, 1 Nov 2005 08:37:43 -0600, Mark Zelden [EMAIL PROTECTED]
wrote:
Roland took a couple of my other programs and modified them into
something to show MEMLIMIT and 64-bit usage for all address spaces.
I'm cleaning it up a little (Roland, those used values were in bytes,
not KB) and will post
Of
Mark Zelden
Sent: Tuesday, November 01, 2005 1:05 PM
To: IBM-MAIN@BAMA.UA.EDU
Subject:Re: MEMLIMIT and IEFUSI
On Tue, 1 Nov 2005 08:37:43 -0600, Mark Zelden [EMAIL PROTECTED]
wrote:
Roland took a couple of my other programs and modified them into
something to show MEMLIMIT and 64-bit
On Tue, 1 Nov 2005 13:15:31 -0500, Richards.Bob [EMAIL PROTECTED]
wrote:
Now for the ability to browse a temp dataset instead of just the SAY
commands. grin
I have canned code to add that if I want. I have just been using my
TSOB exec that traps the output. Most shops have one of those
DB2 V8 and SYNCSORT are the only two tools which allocation storage
above the 2G BAR so far.
I am very happy to trade our memory for reduced SIO's against our DASD
pools.
6 4 - B I T S T O R A G E A L L O C A T I O N
I like that Contact Mark Zelden part at the end. I'm putting that in all my
stuff now.
Jon
snip
First cut.
/*/
/* This exec will show the MEMLIMIT and 64-bit storage allocation*/
/* for all tasks running in the system.
Knutson, Sam wrote:
DB2 V8 and SYNCSORT are the only two tools which allocation storage
above the 2G BAR so far.
Guess it all depends on what you're running. I just tried it on one of
our little test systems and came up with:
| 6 4 - B I T S T O R A G E A L L O C A T I O N
|
-Original Message-
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of
Mark Zelden
Sent: Tuesday, November 01, 2005 1:19 PM
To: IBM-MAIN@BAMA.UA.EDU
Subject:Re: MEMLIMIT and IEFUSI
On Tue, 1 Nov 2005 13:15:31 -0500, Richards.Bob [EMAIL PROTECTED]
wrote
You have a girly-man DB2?
Jon
snip
Guess it all depends on what you're running. I just tried it on one of
our little test systems and came up with:
| 6 4 - B I T S T O R A G E A L L O C A T I O N
|
| TASK MEMORY NUMALLOC HIDDEN HWMMEMLIM
| NAME LIMIT
Jon Brock wrote:
I like that Contact Mark Zelden part at the end. I'm putting that in all my
stuff now.
Jon
What? In your code you have a message to contact Mark?
Outsourcing at its finest.
Kind regards,
-Steve Comstock
Jon Brock wrote:
You have a girly-man DB2?
Most definitely! :-[
--
-
| Edward E. Jaffe||
| Mgr, Research Development| [EMAIL PROTECTED]|
| Phoenix Software
Subject: Re: MEMLIMIT and IEFUSI
On Tue, 1 Nov 2005 08:37:43 -0600, Mark Zelden
[EMAIL PROTECTED]
wrote:
Roland took a couple of my other programs and modified them into
something to show MEMLIMIT and 64-bit usage for all address
spaces. I'm
cleaning it up a little (Roland, those used values were
On Tue, 1 Nov 2005 22:19:55 +0100, Schiradin,Roland HG-Dir itb-db/dc
[EMAIL PROTECTED] wrote:
Tnx Mark, well I'm not a REXX expert but a beta version of SHOWzOS
also contains such a display. I used the REXX to verify my coding.
No, thank you. Do my numbers look good?
The setting for
What is 64P ? Is it 64 petabyte ??! 8-o
Thomas Berg
== Edward E. Jaffe == wrote2005-11-01 19:38:
Knutson, Sam wrote:
DB2 V8 and SYNCSORT are the only two tools which allocation storage
above the 2G BAR so far.
Guess it all depends on what you're running. I just tried it
: Tuesday, November 01, 2005 10:49 PM
To: IBM-MAIN@BAMA.UA.EDU
Subject: Re: MEMLIMIT and IEFUSI
On Tue, 1 Nov 2005 22:19:55 +0100, Schiradin,Roland HG-Dir
itb-db/dc [EMAIL PROTECTED] wrote:
Tnx Mark, well I'm not a REXX expert but a beta version of
SHOWzOS also
contains such a display. I used
Here's SDSF's take on MEMLIMIT:
Display Filter View Print Options Help
---
SDSF DA SYSA SYSA PAG0 SIO 358 CPU
COMMAND INPUT ===
NP JOBNAME CPUCrit StorCrit RptClass MemLimit
*MASTER* NO NO STCDEF16383PB
Brian
Brian Peterson wrote:
Here's SDSF's take on MEMLIMIT:
Display Filter View Print Options Help
---
SDSF DA SYSA SYSA PAG0 SIO 358 CPU
COMMAND INPUT ===
NP JOBNAME CPUCrit StorCrit RptClass MemLimit
*MASTER* NO NO
Hmmm I have MEMLIMIT(6G) coded in SMFPRMxx. Here's a few entries
from SDSF:
Display Filter View Print Options
---
SDSF DA SYSA SYSA PAG0 SIO 435
COMMAND INPUT ===
NP JOBNAME it StorCrit RptClass MemLimit
*MASTER*NO
, November 02, 2005 12:02 AM
To: IBM-MAIN@BAMA.UA.EDU
Subject: Re: MEMLIMIT and IEFUSI
Brian Peterson wrote:
Here's SDSF's take on MEMLIMIT:
Display Filter View Print Options Help
---
SDSF DA SYSA SYSA PAG0 SIO 358 CPU
COMMAND INPUT ===
NP
Mark, you might want to include these in the code rather than a comment.
I assigned them to a stem, and used that in the display, using RAXLVMEMLIMS
as the stem index. Knock some blanks out of the display line, and you're a
goer :)
For convenience I used source.0 = ** ??? **
Shane ...
Brian Peterson wrote:
Hmmm I have MEMLIMIT(6G) coded in SMFPRMxx. Here's a few entries
from SDSF:
NP JOBNAME it StorCrit RptClass MemLimit
*MASTER*NO STCDEF16383PB
PCAUTH NO PCAUTH
XCFAS NO XCFSTC16383PB
GRS NO
My space admin tells me that to support additional 4TB of paging config I
would need 360 additional mod3 volumes. Did I mention that z/OS 1.6 only
supports 256 page data sets (and that includes the common ones)? What will
that do to performance?
Regards, Barbara Nitz
--
10 GB Mailbox, 100
Barbara,
I hestitate to suggest the following as you already seem to be aware of
the RAX - but what is wrong with using the fields in RAXV64B (non-shared
MemObj) and RAXV64C (shared MemObj).
I use this fields to monitor the 64-bit memory usage for address spaces
in MXI G2 - for example :
Cmd
Rob,
great idea!
I hestitate to suggest the following as you already seem to be aware of
the RAX - but what is wrong with using the fields in RAXV64B (non-shared
MemObj) and RAXV64C (shared MemObj).
For some reason I thought the RAX would be in private storage. You're right,
I guess I didn't
Other than turning on VSTOR for DB2 private (which I rather wouldn't do
because of the performance impact),
...
If you're talking about RMF's VSTOR, what performance impact?
I've used it for years withoug any.
is there any way to find out how much
storage above the bar DB2's DBM1 address space
IBM Mainframe Discussion List IBM-MAIN@BAMA.UA.EDU wrote on 10/31/2005
03:00:42 AM:
My space admin tells me that to support additional 4TB of paging config
I
would need 360 additional mod3 volumes. Did I mention that z/OS 1.6 only
supports 256 page data sets (and that includes the common
From: Jim Mulder
The current maximum size of a page data set is 4GB, ...
C'mon Jim, no need to be coy; you're among friends.
When did you fix this, and when can we expect to see it ???. Your past, our
future - Walts answer from the last time still makes my head spin :-).
Shane ...
Ted, as long as you don't hit the max number defined in IEASYSxx/PAGTOTL.
...
PAGTOTAL=256
(I also do similar things for the maximum number of JES-SPOOL, ASID's, TIOT,
systems in a CFRM policy, etc.
I asked for the last once, back in 1994.
The SYSPROG said “No, we only have 5 systems.”
You
, 2005 1:00 AM
To: IBM-MAIN@BAMA.UA.EDU
Subject: Re: MEMLIMIT and IEFUSI
Ted, as long as you don't hit the max number defined in
IEASYSxx/PAGTOTL.
...
PAGTOTAL=256
(I also do similar things for the maximum number of JES-SPOOL,
ASID's, TIOT, systems in a CFRM policy, etc.
I asked for the last once
IBM Mainframe Discussion List IBM-MAIN@BAMA.UA.EDU wrote on 10/31/2005
04:12:46 PM:
From: Jim Mulder
The current maximum size of a page data set is 4GB, ...
C'mon Jim, no need to be coy; you're among friends.
When did you fix this, and when can we expect to see it ???. Your past,
our
PAGTOTL=256 is a virtual limit, the real limit is 253 and I never seen a
number higher then 15.
...
1. Yes, I know. I saw the post.
2. Come to the shops I've had responsibility for.
If the max is not the default, the max is specified.
That's the way I do it.
I also specify as much as I can
On Mon, 31 Oct 2005 00:00:00 GMT, Ted MacNEIL
[EMAIL PROTECTED] wrote:
If the max is not the default, the max is specified.
That's the way I do it.
Bad idea. Many times there are trade-offs in performance or getting
less of something else when you specify the max. You need to look
at each
Just because there is a larger (or smaller) number of something
that can be specified, it doesn't mean you should specify it
...
My bad.
Maybe I over-generalised.
And, I should have put the caveat that it's not always goodness to
'over-specify'.
But, it doesn't cost, set to the max.
That's
Now just suppose you had say 20-30 of these little beasties (M1s) under V7,
spread out over 10-12 LPAR on 3 or 4 Z990 boxes. Oh well, glad I ain't a
SYSPROG or a DBA. Think I'll go out and put my retirement fund(both dollars)
into a nice DASD factory in the PRC. Hmmm maybe I better not ...is this
Gee hasn't this turned into a long running thread? I have worked in many
places where the sysprog's job was to say no loudly and often. I was a
sysprog myself. BTDTGTS. I confess to being largely on the side of the
user community in these cases. But that's just my own bias showing.
Yes, you do
On 28 Oct 2005 15:02:04 -0700, in bit.listserv.ibm-main
[EMAIL PROTECTED] (Ted MacNEIL) wrote:
However, I do agree that DB2 should play by
the rules and not override a system limit
..
I disagree!
I'd rather have my business stay up, than fail because a system programmer
'knew better'!
We just
And if management has not purchased the 4 terabytes of disk space per
DB2 region for backing store, who takes the heat when DB2 tries to get
the space.
...
DB2 is using 2GB, today.
Tomorrow, I put in V8.
And, it's suddenly using 4TB (or, 128)?
C'mon! These things don't happen overnight.
A DB2
.
-Original Message-
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf
Of Ted MacNEIL
Sent: Saturday, October 29, 2005 7:00 PM
To: IBM-MAIN@BAMA.UA.EDU
Subject: Re: (fwd) Re: MEMLIMIT and IEFUSI
And if management has not purchased the 4 terabytes of disk space per
DB2
11:36 PM
To: IBM-MAIN@BAMA.UA.EDU
Subject: Re: MEMLIMIT and IEFUSI
On Thu, 27 Oct 2005 23:11:04 +0200, Schiradin,Roland HG-Dir
itb-db/dc [EMAIL PROTECTED] wrote:
3. Running my simple driver as a STC works fine without any MEMLIMIT
setting. So the SMF MEMLIMIT doesn't apply to STC.
It sure does
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