RUCSA([xM],[yM])
Specifies the sizes of the virtual restricted use common service area (RUCSA)
and extended RUCSA.
xM
Specifies the size of the non-extended RUCSA, located below 16 MB.
yM
Specifies the size of the extended RUCSA, located above 16 MB.
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‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Thursday, March 12, 2020 1:56 PM, Martin Packer <[email protected]>
wrote:
> That rather implies segment-level protection, rather than page.
>
> Cheers, Martin
>
> Martin Packer
>
> zChampion, Systems Investigator & Performance Troubleshooter, IBM
>
> +44-7802-245-584
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> email: [email protected]
>
> Twitter / Facebook IDs: MartinPacker
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>
> From: Mark Jacobs [email protected]
> To: [email protected]
> Date: 12/03/2020 16:59
> Subject: [EXTERNAL] Re: RUCSA
> Sent by: IBM Mainframe Discussion List [email protected]
>
> RUCSA has to be allocated on a 1M boundary, so take that into
> consideration when looking at your virtual storage map. A RUCSA allocation
> below the line, if you don't also reduce CSA will result in the below the
> line private being reduced by 1M. Extended private isn't usually much of a
> concern.
>
> Mark Jacobs
>
> Sent from ProtonMail, Swiss-based encrypted email.
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> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
> On Thursday, March 12, 2020 12:11 PM, Jousma, David
> [email protected] wrote:
>
> > Thanks for clarifying Jim!
> > Dave Jousma
> > AVP | Manager, Systems Engineering
> > Fifth Third Bank | 1830 East Paris Ave, SE | MD RSCB2H | Grand Rapids,
>
> MI 49546
>
> > 616.653.8429 | fax: 616.653.2717
> > From: IBM Mainframe Discussion List [email protected] on behalf
>
> of Jim Mulder [email protected]
>
> > Sent: Thursday, March 12, 2020 11:38:36 AM
> > To: [email protected] [email protected]
> > Subject: Re: RUCSA
> > CAUTION EXTERNAL EMAIL
> > DO NOT open attachments or click on links from unknown senders or
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> > For releases earlier than z/OS 2.4, RUCSA is provided by APAR OA56180.
> > R790 PSY UA98722 UP19/03/28 P F903
> > R7A0 PSY UA98723 UP19/03/28 P F903
> > R7B0 PSY UA98724 UP19/03/28 P F903
> > publibz.boulder.ibm.com/zoslib/pdf/OA56180.pdf
> > Jim Mulder z/OS Diagnosis, Design, Development, Test IBM Corp.
> > Poughkeepsie NY
> > "IBM Mainframe Discussion List" [email protected] wrote on
> > 03/12/2020 11:07:04 AM:
> >
> > > From: "Jousma, David" [email protected]
> > > To: [email protected]
> > > Date: 03/12/2020 11:34 AM
> > > Subject: Re: RUCSA
> > > Sent by: "IBM Mainframe Discussion List" [email protected]
> >
> > > The problem with RUCSA "feature" not being available in prior
> > > version (maybe it is, I just don’t see it), is that there is no path
> > > to convert into that prior to rolling V2.4. I guess all the
> > > prep work could be done (SAF rules, etc) ahead of time, but that
> > > would surely be a "must check out". The other problem with RUCSA
> > > is that if your offending/affected app requires below-the-line CSA,
> > > the minimum amount of RUCSA is 1MB, even if you only needed a few K
> > > for whatever you are doing. That will affect below-the-line
> > > private for sure.
> >
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