Re: Help! System has become unresponsive!

On 4/21/2014 3:15 PM, James H. H. Lampert wrote:

Our production box just went completely unresponsive. TELNET, server
jobs, you name it. We can get to a sign-on screen in LAN Console, but it
doesn't sign on.

OK, so that's not COMPLETELY unresponsive, because you are getting some
I/O. That's a clue, not a nit. Look at the actual machine. Are the
disk drive activity lights very busy? If yes, you may have a runaway
query. If no, you may have a runaway CPU hog in a very tight loop.
Also, check to see if you have an SRC.

If you can afford to wait, see if you can get to a command line and
change your job priority to 2 and then WRKACTJOB, WRKSYSSTS to see
what's going on in there. If you can't afford to wait, force an IPL and
look at QHST to see if there's a clue as to what happened.

--buck