Very Computer

by ***** andE *** » Fri, 08 Jul 1994 00:07:33

HELP!!

I'm on a UNIX SVR4 (SINIX to be precise but hopefully that is
irrelevant) and have a problem with the semget() function;
I get the errno which indicates ENOSPC (no space left on device)
which means according to the manual that the limit for semaphores
on the machine has been reached. Second problem is that all of our
wonderful gurus are on holiday!
Anybody know how to tweak a few more semaphores out of my system?

ta from afar
andE

by **Chuck Campbe** » Fri, 08 Jul 1994 01:57:01

Quote:> HELP!!
> I'm on a UNIX SVR4 (SINIX to be precise but hopefully that is
> irrelevant) and have a problem with the semget() function;
> I get the errno which indicates ENOSPC (no space left on device)
> which means according to the manual that the limit for semaphores
> on the machine has been reached. Second problem is that all of our
> wonderful gurus are on holiday!
> Anybody know how to tweak a few more semaphores out of my system?
> ta from afar
> andE

The only way I know (for a SUN) is to rebuild the kernel after changing
a parameter in the config file. I assume it's the same for your unix.

-chuck

"Integration means more than having all the maps at the same scale!"

by **Steve Kapp** » Fri, 08 Jul 1994 03:02:30

>> HELP!!

>> I'm on a UNIX SVR4 (SINIX to be precise but hopefully that is
>> irrelevant) and have a problem with the semget() function;
>> I get the errno which indicates ENOSPC (no space left on device)
>> which means according to the manual that the limit for semaphores
>> on the machine has been reached. Second problem is that all of our
>> wonderful gurus are on holiday!
>> Anybody know how to tweak a few more semaphores out of my system?

>> ta from afar
>> andE

>The only way I know (for a SUN) is to rebuild the kernel after changing
>a parameter in the config file. I assume it's the same for your unix.

That is the mechanism for SunOS 4.x.

Solaris 2.x is SVR4-ish. On Solaris you add line(s) to the /etc/system file and
reboot.

See Appendix A "Tuning Kernel Parameters" of the Solaris AnswerBook
document "Solaris 2.3 Administering Security, Performance, and Accounting" for
details.

Our Pyramid running SVR4 has a completely different mechanism.

We are suppose to be getting a AT&T (NCR) SVR4 system real-soon-now and
I wouldn't be surprised if it was different yet again.

In other words, it depends a lot on your specific incarnation of SVR4.

The other thing is deciding which value to change - there are probably half
a dozen that have to do with semaphores :-)

Good luck!

---
______________________________________________________________________

Apertus Technologies, Inc.
7275 Flying Cloud Drive
Eden Prairie, MN 55344

by w » Fri, 08 Jul 1994 15:24:13

Quote:>I'm on a UNIX SVR4 (SINIX to be precise but hopefully that is
>irrelevant) and have a problem with the semget() function;
>I get the errno which indicates ENOSPC (no space left on device)
>which means according to the manual that the limit for semaphores

Use the idtune command to raise the value of the "semmns"
tunable. Then rebuild your kernel using idbuild.

You may want to read the man pages for mtune, stune, idtune,
idbuild, etc.

Wolfgang

"UNIX was not designed to stop you from doing stupid things, because
that would also stop you from doing clever things." -- Doug Gwyn

Very Computer

HELP: semaphore limit

HELP: semaphore limit

HELP: semaphore limit

HELP: semaphore limit

HELP: semaphore limit