On Wed, 7 Nov 2012 11:40:49 -0800, Phil Smith <p...@voltage.com> wrote:
>Dumb Questions time! > >I've been trying to grok in fullness the various fields in the LDA >(SYS1.MODGEN(IHALDA)). I've Googled everything I can think of and read all the >docs I can find. I found >http://www-01.ibm.com/support/docview.wss?uid=isg3T1000078, which helps some, >but I'm having trouble with answers to the following: > > >1) Definition of "extended user private storage". I think this means >"memory above the line in the private (local) address space", i.e., the >region, if it's a job, but it's never explicitly defined as such. I think this >is the "Extended Region (ERGN)" on the drawing in the link above. Correct? Yes > > >2) Definition of "user private storage". Correspondingly, I think this >means "memory below the line in the private (local) address space", i.e., in >the region; "Region (RGN)" on the drawing. > Yes > >3) Is private memory "above the bar" tracked separately from memory above >the line? Yes. >Or is it, but in some other control block? Yes, see RSM Address Space Block Extension (RAX) SYS1.MODGEN(IARRAX) See my REXX sample - RXSTOR64 on my web site. >Or can a non-system address space not use memory above the bar, despite having >64-bit addressability? That last actually seems >like it might be the case, >based on REGION=2047M being the max No, anyone can use IARV64. See MVS macros for details. > >Mostly I want to be able to report 31-bit memory usage below the line and >above, without worrying about some ginormous definition making someone who's >short on below-the-bar memory think they have a bunch left. You can have a look at REXXSTOR on my web site as an example of displaying LDA control block values. Regards, Mark -- Mark Zelden - Zelden Consulting Services - z/OS, OS/390 and MVS mailto:m...@mzelden.com Mark's MVS Utilities: http://www.mzelden.com/mvsutil.html Systems Programming expert at http://expertanswercenter.techtarget.com/ ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
