From owner-freebsd-multimedia  Tue Apr 15 06:45:12 1997
Return-Path: <owner-multimedia>
Received: (from root@localhost)
          by freefall.freebsd.org (8.8.5/8.8.5) id GAA10180
          for multimedia-outgoing; Tue, 15 Apr 1997 06:45:12 -0700 (PDT)
Received: from miller.cs.uwm.edu (miller.cs.uwm.edu [129.89.139.22])
          by freefall.freebsd.org (8.8.5/8.8.5) with ESMTP id GAA10155;
          Tue, 15 Apr 1997 06:45:03 -0700 (PDT)
Received: (from james@localhost)
	by miller.cs.uwm.edu (8.8.5/8.8.5) id IAA22341;
	Tue, 15 Apr 1997 08:44:46 -0500 (CDT)
Date: Tue, 15 Apr 1997 08:44:46 -0500 (CDT)
From: Jim Lowe <james@miller.cs.uwm.edu>
Message-Id: <199704151344.IAA22341@miller.cs.uwm.edu>
To: CSP1DWD@MVS.OAC.UCLA.EDU, multimedia@freebsd.org
Subject: Re:  shmat: too many files open
Cc: questions@freebsd.org
Sender: owner-multimedia@freebsd.org
X-Loop: FreeBSD.org
Precedence: bulk

> From: Denis DeLaRoca                       <CSP1DWD@MVS.OAC.UCLA.EDU>
> Subject: shmat: too many files open
> 
> When running vic 2.8 I end up with
> 
>       shmat: too many files open
> 
> as I attempt to open more than 3 video windows from a session that
> features multiple participants. My FreeBSD 2.2.1 kernel is configured
> for shared memory support and the following parms
> 
>       SHMMAXPGS=1025
>       "SHMMAX=(SHMMAXPGS*PAGE_SIZE+1)"
> 
> should I increase the above further? What's the value of PAGE_SIZE?
> These values have changed... in an ancient 2.2 snapshot that I used
> to run with 2048KB of shared memory opening more than 3 vic video
> windows was never a problem.

Under 2.2 you can use change the number of segments with:

options         "SHMSEG=32"             # 32 segements/user (for X)
options         "SHMMNI=128"            # 128 identifiers

I don't know why the system defaults the number of segement to 8, it
seems a little low to me.

Hope it helps,

	-Jim