In <[EMAIL PROTECTED]>, on
03/12/2008
at 02:50 PM, "Staller, Allan" <[EMAIL PROTECTED]> said:
>1) Determine actual working set in use.
The working set is relevant to sizing central storage and to tuning
distribution across devices, control units and channels. To size local
page data sets you
In <[EMAIL PROTECTED]>, on
03/12/2008
at 02:55 PM, "Knutson, Sam" <[EMAIL PROTECTED]> said:
>It may be overkill but I stick with a 1:1 space allocation in page space
>to central storage.
I'd consider that underallocation, but if you have enough central that you
never page, it won't matter.
IBM Mainframe Discussion List wrote on 03/12/2008
02:33:10 PM:
> Note that HYPER-PAVs don't play in the paging subsystem yet. Still
awaiting
> word on this issue from IBM (Jim Mulder, maybe?).
HyperPAV does work with paging the same way as Dynamic PAV,
but you still do need to specify WLM
> -Original Message-
> From: IBM Mainframe Discussion List On Behalf Of Mark Zelden
>
> [ snip ]
> John,
>
> Have you reviewed chapter 2 of the system initialization and
> tuning guide?
> http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/IEA
> 2E151/2.0?SHELF=IEA2BK80&DT=2008011
What would be a "comfortable" paging subsystem configuration, especially
for the Production LPAR, as to individual size and (especially) number
of page datasets?
IMO, the "largest needed" paging subsys can be determined as follows:
1) Determine actual working set in use. This is easy if you ar
bold, start simple, grow fast..."
-Original Message-
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On
Behalf Of Chase, John
Sent: Wednesday, March 12, 2008 12:58 PM
To: IBM-MAIN@bama.ua.edu
Subject: Paging Subsystem -- "Comfortable" Size and Configuration?
Hi, All,
In
On Wed, 12 Mar 2008 11:57:55 -0500, Chase, John <[EMAIL PROTECTED]> wrote:
>Hi, All,
>
>In preparation for z/OS 1.9 we're re-evaluating our paging subsystem
>configurations. Currently we're using the same size and configuration
>carried forward from "time immemorial", mainly because it still "wor
As a "Rule of Thumb" (and thumbs come in various shapes and sizes ... yours
may vary):
1 PLPA dataset
1 COMMON dataset
4 (or more) LOCAL datasets
LOCAL datasets should peak at no more that 30 (or so) percent utilization,
else the block paging algorithm starts to have problems (the probability o
Hi, All,
In preparation for z/OS 1.9 we're re-evaluating our paging subsystem
configurations. Currently we're using the same size and configuration
carried forward from "time immemorial", mainly because it still "works":
Three (3) page datasets of 2,000 cylinders each, with one "in reserve"
(avai
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