Another gem from Barbara! I love the way she starts her post's with
"don't get me started" and then starts and finishes with such aplomb!
On 23/03/2011 1:50 PM, Barbara Nitz wrote:
Dataspaces have been around for just a little while - then there is all
that room
above the (not so) new-fangled bar.
Don't get me started, Shane! Actually, my general paranoia about not
allowing too much space above the bar because we cannot back it and the AUX
storage will run out paid off big time recently:
We are using a product called CFT (from Axway) in version 2.4. My colleague
wanted to upgrade to version 2.6 in preparation for the z/OS migration.
Unfortunately, CFT first 0C4'd because they could not deal with pcca/lcca
above the line (which they had a fix for), and *then* they got the abenddc2
indicating a problem above the bar.
-
After quite a bit of bashing from me, Axway finally admitted that in release
2.6 they had gone from being a 2GB virtual STC to being a 2GB virtual STC
PLUS 20 (twenty!) GB of storage above the bar DURING startup. All of it
backed (they put a chain pointer on every page), none of it needed (after
all, this is a test system with only 2GB real that never really transfers
anything). None of this was documented anywhere, of course.
They have accepted a 'requirement' that they cannot do that. But it will
only be implemented in release 2.7. My management decided that we won't
allow migration to a higher release until this is fixed.
In essence, generally allowing memlimit to be unlimited is dangerous to any
paging configuration!
Regards, Barbara
----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO
Search the archives at http://bama.ua.edu/archives/ibm-main.html
----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO
Search the archives at http://bama.ua.edu/archives/ibm-main.html
