Yes, RUCSA goes in units of 1 MB. Kees.
-----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Martin Packer Sent: Thursday, March 12, 2020 6:56 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: RUCSA That rather implies segment-level protection, rather than page. Cheers, Martin Martin Packer zChampion, Systems Investigator & Performance Troubleshooter, IBM +44-7802-245-584 email: martin_pac...@uk.ibm.com Twitter / Facebook IDs: MartinPacker Blog: https://www.ibm.com/developerworks/mydeveloperworks/blogs/MartinPacker Podcast Series (With Marna Walle): https://developer.ibm.com/tv/mpt/ or https://itunes.apple.com/gb/podcast/mainframe-performance-topics/id1127943573?mt=2 Youtube channel: https://www.youtube.com/channel/UCu_65HaYgksbF6Q8SQ4oOvA From: Mark Jacobs <00000224d287a4b1-dmarc-requ...@listserv.ua.edu> To: IBM-MAIN@LISTSERV.UA.EDU Date: 12/03/2020 16:59 Subject: [EXTERNAL] Re: RUCSA Sent by: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> 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. GPG Public Key - https://urldefense.proofpoint.com/v2/url?u=https-3A__api.protonmail.ch_pks_lookup-3Fop-3Dget-26search-3Dmarkjacobs-40protonmail.com&d=DwIFaQ&c=jf_iaSHvJObTbx-siA1ZOg&r=BsPGKdq7-Vl8MW2-WOWZjlZ0NwmcFSpQCLphNznBSDQ&m=lNiQeZuiD4Q6umXm_yMCJWEXWafS72oqVI88BoMIYB8&s=3Ic9ZT6StCzl4I0XY0hY1sJAM4AoTn_emnlZJULRPI0&e= ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Thursday, March 12, 2020 12:11 PM, Jousma, David <000001a0403c5dc1-dmarc-requ...@listserv.ua.edu> 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 IBM-MAIN@LISTSERV.UA.EDU on behalf of Jim Mulder d10j...@us.ibm.com > Sent: Thursday, March 12, 2020 11:38:36 AM > To: IBM-MAIN@LISTSERV.UA.EDU IBM-MAIN@LISTSERV.UA.EDU > Subject: Re: RUCSA > > CAUTION EXTERNAL EMAIL > > DO NOT open attachments or click on links from unknown senders or unexpected emails > > 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" IBM-MAIN@LISTSERV.UA.EDU wrote on > 03/12/2020 11:07:04 AM: > > > From: "Jousma, David" 000001a0403c5dc1-dmarc-requ...@listserv.ua.edu > > To: IBM-MAIN@LISTSERV.UA.EDU > > Date: 03/12/2020 11:34 AM > > Subject: Re: RUCSA > > Sent by: "IBM Mainframe Discussion List" IBM-MAIN@LISTSERV.UA.EDU > > > 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. > > -- > > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > CAUTION EXTERNAL EMAIL > > DO NOT open attachments or click on links from unknown senders or unexpected emails > This e-mail transmission contains information that is confidential and may be privileged. > It is intended only for the addressee(s) named above. If you receive this e-mail in error, > please do not read, copy or disseminate it in any manner. 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