Max number of semaphores Red Hat

[Wagner_17]

Dear friends,

I need to increase semaphores number of my Red Hat Enterprise Linux ES release 4 (Nahant Update 4) 2.6.9-42.ELsmp #1 and i want to know what is the max number allowed. By now we have:

# /sbin/sysctl -a | grep sem
kernel.sem = 250 32000 100 128

Put semaphores number to the top will generate some excessive memory consumption or it's irrelevant? In other way, what means numbers showed right from "250" value?

Thanks for informations.

[Autocross.US]

The order of the space separated list in kernel.sem is semmsl semmns semopm semmni

Running 'ipcs -l' will tell you what these are:

...
------ Semaphore Limits --------
max number of arrays = 128
max semaphores per array = 250
max semaphores system wide = 32000
max ops per semop call = 100
semaphore max value = 32767
...