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Date:      Fri, 08 Sep 2000 08:10:33 -0700
From:      Cy Schubert - ITSD Open Systems Group <Cy.Schubert@uumail.gov.bc.ca>
To:        James Housley <jim@thehousleys.net>
Cc:        Cy Schubert - ITSD Open Systems Group <Cy.Schubert@uumail.gov.bc.ca>, freebsd-stable@FreeBSD.ORG
Subject:   Re: SHMSEG and general shared memory settings 
Message-ID:  <200009081511.e88FB7q03337@cwsys.cwsent.com>
In-Reply-To: Your message of "Fri, 08 Sep 2000 10:51:12 EDT." <39B8FCE0.A1C65570@thehousleys.net> 

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In message <39B8FCE0.A1C65570@thehousleys.net>, James Housley writes:
> This is a cryptographically signed message in MIME format.
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> Cy Schubert - ITSD Open Systems Group wrote:
> > 
> > In message <39B8EA14.D76BFDD2@btinternet.com>, John Toon writes:
> > > Hi,
> > >
> > > Could I suggest that the generic kernel be changed from having a
> > > SHMSEG=9 (as in LINT) to something higher?
> > >
> > > This setting is totally useless if you're planning on running XFre86-4.0
> > > with something like GNOME; you simply run out of shared memory segments,
> > > and consequently many programs just won't start up, issuing "X error of
> > > failed request". The SHMSEG setting is also one of the "undocumented"
> > > options in LINT, so consequently it was hard work trying to solve the
> > > problem.
> > >
> > > I have since compiled my custom kernel with SHMSEG=1024, and everything
> > > works beautifully.
> > 
> Where is there docs on each of these?  After sequence of errors
> ports/misc/amanda24 won't flush failed dumps due to shmget error.

I haven't seen any FreeBSD doc about any SYSV parameters.  Personally, 
I use the O'Rielly performance and tuning book, though working in an 
Oracle ghetto does help understand the parameters.  Sun has some good 
papers describing them as well.


Regards,                       Phone:  (250)387-8437
Cy Schubert                      Fax:  (250)387-5766
Team Leader, Sun/DEC Team   Internet:  Cy.Schubert@osg.gov.bc.ca
Open Systems Group, ITSD, ISTA
Province of BC




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