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Date: Fri, 23 May 2003 09:42:51 -0400
From: Bill Moran <wmoran@potentialtech.com>
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To: Vladimir Sysoev <vlad@unim.ru>
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Subject: Re: About semaphores
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Vladimir Sysoev wrote:
> I install Iserverd on my FreeBSD 4.6 server and it reports to 
> /var/log/messages : Not enough semaphores. change kernel parameters.
> 
> I try to use sysctl kern.ipc... but these parameters are read only.
> 
> 1. Does anybody know about how to increase maximum semaphores counts?
> 2. Where can I obtain information about kernel(sysctl) parameters (books 
> manuals and others).

The only way I know of is to compile a custom kernel.
See /usr/src/sys/i386/conf/LINT for information on semaphore settings.
Also, the PostgreSQL folks use semaphores a lot and have some
documentation on how to get enough semaphores (and other shared memory)
on FreeBSD for different needs.  If you install the PostgreSQL port,
it installs the file /usr/local/pgsql/post-install-notes which has
information on how to jack up shared memory usage (including semaphores).
This file is likely to be available on the web as well.

-- 
Bill Moran
Potential Technologies
http://www.potentialtech.com