> -----Original Message----- > From: IBM Mainframe Discussion List > [mailto:[EMAIL PROTECTED] On Behalf Of Steve Arnett > Sent: Wednesday, May 25, 2005 3:06 PM > To: [email protected] > Subject: Re: Region size question > > > You boys (and girls) are so dad blasted smart. Corolarry > number 1: I am > so stuborn. > > I did some stc testing(took the initiator and fragmentation > out of the > picture) to find what size I really did have. Seems that > when GDAREGSZ > is indicating 12288K(12M), I really only have 12072K > available. So, I > backed off my maximum region size from GDAREGSZ by .5M for my max > region and backed it off 64K more for max getmain. Once I > bounced the > system, I could start an STC with REGION=15M and it works > like a champ. > > I suppose for a production system, I would probably want to > back off 1M > for batch jobs to allow for (lots of) initiator fragmentation.
Steve, Another thing to consider is that if you give a program all of the below-the-line storage, and it actually GETMAINs it, the job could fail with "strange" abends if something goes wrong. For instance, not being able to get a SYSUDUMP due to not being able to load the formatting routines. I've even had some abend with an S40D (taking down the initiator, IIRC) due to no LSQA being available for things like the RTM work areas. I've had dynamic allocations fail, files refuse to open, many other strange and wonderful things. Also, just for fun, have you considered using the VSMLIST macro to find the largest below-the-line free space? Using this would account for any fragmentation dynamically. Of course, if an initiator is badly fragmented, it might be nice to have a way to automagically restart it. -- John McKown Senior Systems Programmer UICI Insurance Center Information Technology This message (including any attachments) contains confidential information intended for a specific individual and purpose, and its' content is protected by law. If you are not the intended recipient, you should delete this message and are hereby notified that any disclosure, copying, or distribution of this transmission, or taking any action based on it, is strictly prohibited. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
