Ok, I would propose that this is not a hang but a perceived hang. That is, the system was just fine but its responsiveness was degraded well below tolerable levels. That explains the lack of diagnostics: the 'problem' is in the eye of the beholder :-)
DB2 and that test job are looking guilty as they can be. I'd love to put the WLM importance of DB2xMSTR near pond scum (discretionary) for an iteration or two. Can't remember the OP's particulars, but I'd call attention to a thread with the subject "Increased CPU with z10 and DB2 V9 NFM" and wonder if there is a correlation. This is fun. -----Original Message----- From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of JE Thinnes Sent: Thursday, January 08, 2009 3:35 PM To: IBM-MAIN@bama.ua.edu Subject: Re: MVS 4 minute 'outage' Had another hang today - 6 minutes 50 seconds. HMC SAD indicated 100% utilization in supervisor state. RMF indicated the DB2xMSTR was the big CPU user. The DB2 test batch job was not canceled this time but rather completed rc=0 - just as the system came back. IBM asked for a dump (which has been sent), suggested an increase to TRACE (TRACE ST,3M) and asked for a dump to be taken as close to the next hang as possible. We considered Jim Mulder's suggestion of writing a small stimer program or using OPS/MVS - but decided to issue the DUMP command on the 'hung' console. When the system free's up - the dump will be taken. I've asked the programmer NOT submit the possible causing batch job until I can get the system in a more controlled environment this weekend. Thanks again for the suggestions. ---------------------------------------------------------------------- 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 NOTICE: This electronic mail message and any files transmitted with it are intended exclusively for the individual or entity to which it is addressed. The message, together with any attachment, may contain confidential and/or privileged information. Any unauthorized review, use, printing, saving, copying, disclosure or distribution is strictly prohibited. If you have received this message in error, please immediately advise the sender by reply email and delete all copies. ---------------------------------------------------------------------- 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
