Tjarko Dijkema wrote:
>
> We would like to invite anyone to help us solving a problem.
> Our environment: HP/3000-957SX running MPE/iX 5.0 with 120 users having a
> mix of HP terminals and PC's with Reflection for Windows (W3.1 and W95) as
> emulator.
> Comms hardware is DTC72MX.
> Only one application is running on the system being EMA/3000 (Materials
> management system developed by SIPM (Shell)).
>
> The problem: whenever a user accidentally switches off his PC or Terminal
> while in an active session with HP, that specific session will hang up and
> Glance shows a very high CPU usage causing a bottle neck condition wherein
> other sessions and batch jobs is starved for CPU.

From the above I assume all your users are connected per serial lines,
and not per NS/VT/LAN.

I would suggest you contact your local (BTW: what country does the
.qa domain stand for ?) support, to get you the latest Terminal IO
patch (DTSEDD9 as I recall) to rule out all solved issues from an
HP software perspective.

I recall to have seen 2 or 3 cases like this in the past, where the
faulty part was the application going into a tight loop and not the
operating system code looping (the fact that you are able to abort
the sessions supports that), though I do not want to do any finger-
pointing.

I do not know how your local HP support is organized (do you have
a Response Center and the associated contract ?), but if they fail
to debug the problem, they can get futher help from the expert
centers (kind of a worldwide response center for the response
center engineers).

Goetz.