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SEMMNS

SlopeZ
Frequent Advisor

SEMMNS

Hi all,

i found in a BEA TUxedo documentatión de Kernel parameter SEMMNS: maximum system semaphores for TRU64 but i can't find this parameter on my system Kernel.

Can anyone explain me what it's and where i can find it?

What it's the difference with SEMMNI and SEMMSL?

Thanks in advance!

Regards,
Saints
7 REPLIES
Michael Schulte zur Sur
Honored Contributor

Re: SEMMNS

Hi,

you find them with
sysconfig -q ipc
see man sys_attr_ipc

greetings,

Michael
sem_mni
Maximum number of System V semaphores that can be used on the system at
one time.

Default value: 10 (semaphores) (The system rounds the number to the
value associated with the next higher power of two; for example, 16.)

Minimum value: 0

Maximum value: INT_MAX

sem_msl
Maximum number of System V semaphores that can be used by a single pro-
cess at one time.

Default value: 25 (semaphores)

Minimum value: 0

Maximum value: INT_MAX
Hein van den Heuvel
Honored Contributor

Re: SEMMNS

I'm sure you already saw how to read the current semaphore configuration:

sysconfig -q ipc (or -Q ipc)


You can find parameter explanation in

man sys_attrs_ipc

sem_mni
"Maximum number of System V semaphores that can be used on the system at one time."

sem_msl
"Maximum number of System V semaphores that can be used by a single process at one time."



hth,
Hein.

Hein van den Heuvel
Honored Contributor

Re: SEMMNS

Ooops, reply collision. Exact same answer from two different continents. Grins,
Hein.
Michael Schulte zur Sur
Honored Contributor

Re: SEMMNS

Hein,

can happen :-)
Sometimes I do research am happy I found something post it and discover that someone else had the same idea.
I saw now that I missed an s in the man command, it is sys_attrs_ipc

greetings,

Michael

SlopeZ
Frequent Advisor

Re: SEMMNS

Hi all,

Michael this is the right way to find de MEMNS, sysconfig -q ipc but there is no reference to this parameter.

I've checked on 3 machines and no one has the parameter..

About semmni and semmsl i have all the information now. Thanks.

Regards.
Saints.
Michael Schulte zur Sur
Honored Contributor

Re: SEMMNS

Hi,

check on these two links:
http://e-docs.bea.com/tuxedo/tux71/html/inspds3.htm
http://e-docs.bea.com/tuxedo/tux80/install/inspds.htm
depending on your os release. I could find no reference to your parameter. I assume it to be a typoe and it actually refers to num_of_sems, which is obsoleted somewhere in 5.x

greetings,

Michael
SlopeZ
Frequent Advisor

Re: SEMMNS

thanks to all.