topic Re: maximum number of semaphores in Operating System - HP-UX

maximum number of semaphores

robert nation — Mon, 05 Mar 2001 18:43:12 GMT

Hello,

we are trying to combine two applications, but have hit
a system-wide limit on the number of semaphores (as shown with command ipcs -s), that is causing trouble.

The system limit appears to be 64 semaphores, but we need about 70 total.

Is there a way to change the limit?

Robert Nation
robert.j.nation@lmco.com
BAE SYSTEMS

Re: maximum number of semaphores

Rita C Workman — Mon, 05 Mar 2001 18:49:51 GMT

Semaphores are set by kernel parms (semm*). Here's a thread that should help explain to you the basics on how to calculate and set these,

http://forums.itrc.hp.com/cm/QuestionAnswer/1,1150,0x10ca6af52b04d5118fef0090279cd0f9,00.html

/rcw

Re: maximum number of semaphores

James A. Donovan — Mon, 05 Mar 2001 18:54:51 GMT

There are several parameters which control semaphores. You can use the SAM utility to adjust them to your needs. To increase the maximum number of semaphores the parameter you need to adjust is: semmni. You'll probably find that you'll want/need to increase other parameters as well.