Many years ago, I forget whether we were at V1.4 or V1.7 - we are now at V1.9 - 
We had a similar situation, except that we were in a multi-engine machine.  We 
received a IEE message telling us that one processor was in spin mode and 
asking what to do about it.  I think also that we were doing some funky stuff 
with DB2.  What may be causing a big impact in your case is the fact that you 
are a uni-processor; no other recourse but to wait for the spin to wear itself 
out.

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of 
Knutson, Sam
Sent: Thursday, January 08, 2009 11:38 AM
To: [email protected]
Subject: Re: MVS 4 minute 'outage'

WSC had an updated presentation from that whitepaper done at local CMG and also 
SHARE

http://regions.cmg.org/regions/ncacmg/downloads/mar082007_session2.pdf 

        Best Regards, 

                Sam Knutson, GEICO 
                System z Performance and Availability Management 
                mailto:[email protected] 
                (office)  301.986.3574 
                (cell) 301.996.1318              

"Think big, act bold, start simple, grow fast..." 


-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of 
JE Thinnes
Sent: Thursday, January 08, 2009 9:58 AM
To: [email protected]
Subject: Re: MVS 4 minute 'outage'

Thanks for all the suggestions.

Update.  We experienced another 'hang' lasting 2 minutes.  LOGREC indicated 
SFTABN (S0222) on the same low priority batch job before both hangs.  The 
programmer indicated the job was doing many inserts/updates to various DB2 
tables before it was canceled (this was on a test DB2 system).

We opened an incident with IBM - they indicated a DB2 roll back could not 
have caused the hang of the Console address space.  

We are still persuing with IBM.

Are the any z/OS 1.9 uniprocessor configs out there?  Have any default 
settings changed in 1.9 that I should look at?  I am reviewing a uniprocessor 
white paper from Dec 2006.  Any other ideas??
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