Moe Roshannai wrote:

> Hello everyone @ 3000-l,
>
>      We have a few questions regarding limits on HP 3000 with MPE/iX 7.0.
> We have found some answers, but need to reconfirm.  Appreciate your help.
>
> What is the maximum number of open files per each process?
>
> We found the number being 1024.

Yes ( increased to 4096 with MPE/iX 7.5 ).
In both cases you have to account for file numbers 1..8 to
be reserved by the OS, and if your program needs multiple
libraries to be loaded for execution, then these libraries
will also occupy file numbers.

> What is the maximum number of files that can be open per job or sessions?
>
> We found that the answer is unlimited (it is limited to the limit per
> process).

Yes.
Caveat: there is a maximum number of open files total
on the system limited by an OS table (VSOD/GUFD) table:
on 6.5/7.0/7.5 : 68759 .

> What is the maximum number of son processes that can be created by a
> program?
>
> We think it is unlimited.
>
> What is the maximum number of son processes that can be created by a program
> in a job?
>
> We think it is unlimited.

Yes, both limited only by the total number of processes
allowed on the system, which is scaled with the
memory size.

Please see the "BIGPIN Feature: Support Up To 12000 Concurrent Processes"
article in the MPE/iX 7.0 Express 1 Communicator for more details.
(http://docs.hp.com/mpeix/onlinedocs/30216-90328/30216-90328.html)

HTH,
Goetz.

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