Re: AS/400 Locking up

[Dr Syd Nicholson <sydnic@xxxxxxxxxx>]

Hi Joe,

Does the system completely lock up, or can you still issue commands from
the console.

The console job runs at priority 10 so should take precedence over all
other user work. However, if a program is in a loop or something, the
console can still be quite slow.

If the console does not give you a response, then there are a number of
possibilities. Ones I think of are:

1. A system job taking a lot of CPU. System jobs run at low priority -
often priority 0. There may be a valid reason for this which would
require further investigation, or it may be a problem that IBM need to
solve.

2. A user job has been set to run at priority 10 or less and is in a
tight loop.

3. A programmer or somebody has a changed job to a priority of 10 or
less which then hogs the system, or has bug and starts into a tight loop.

Usually, the console will respond, albeit very slowly. I would be
tempted to use WRKACTJOB to try to find the culprit. You will probably
need patience with the very long response times.

Another question - When the system locks up, how long does the lock up
last, does it eventually free itself?

Syd Nicholson



Joe Lewis wrote:

> About 30 days ago for the first time, my little 170 just locked up.  TCP
> and Twinax stopped working, no error code on the front panel, the power
> light was green, and the processor light was lit up solid.   After
> talking with IBM (hours later), I had to manual power down.  Once back
> up, there were no error listings in any of the logs or in Service Tools.
> Then 2 weeks later, it did it again.  Then over this past weekend,
> again yesterday and now this morning.  Hardware support thinks it's
> software.  I am on hourly support with Software, and I don't want to
> spend the money just find out it's an IBM issue ($250 an hour is not in
> my budget).  I upgrade to v5r1 ,with all the PTFs at the time, in
> February.  Nothing new has been added since then.  Other then ordering
> the latest CUM (which I did), I am stumped.  Has anyone ran into this
> before?
>
> - Joe Lewis
>
>
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