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Date:      Fri, 4 May 2001 11:50:12 -0700
From:      Alfred Perlstein <bright@wintelcom.net>
To:        Matt Dillon <dillon@earth.backplane.com>
Cc:        lists@mediumgreen.com, freebsd-stable@FreeBSD.ORG
Subject:   Re: Should /sys/i386/conf/GENERIC's SysV shared memory settings+defaults be re-thought?
Message-ID:  <20010504115012.S18676@fw.wintelcom.net>
In-Reply-To: <200105041847.f44IlMl30759@earth.backplane.com>; from dillon@earth.backplane.com on Fri, May 04, 2001 at 11:47:22AM -0700
References:  <200105041729.f44HTjr27074@earth.backplane.com> <200105041847.f44IlMl30759@earth.backplane.com>

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* Matt Dillon <dillon@earth.backplane.com> [010504 11:48] wrote:
> :>    whether I have to raise SHMMNI and SHMSEG even higher -- I'm guessing
> :>    that your problems were mostly due to the too-low SHMMAXPGS default.
> :
> :I've seen similar issues with my home machine.  If I leave vmware running,
> :my backups fail.  I haven't yet gotten around to rebuilding the kernel with
> :the shm setting changed.
> :
> :Here is my current ipcs output:
> :
> :...
> 
>     Thanks guys.  As I thought.. the issue is almost certainly the shared
>     memory maximum.  I've raised the default from 4M to 32M in -current
>     and I will MFC it to -stable on monday.  I also raised the control
>     structure limits slightly.

Afaik solaris has kern.ipc.shm_use_phys set to 1 automagically,
meaining that shared memory is not pageable.  what are your thoughts
on making that the default?

-- 
-Alfred Perlstein - [alfred@freebsd.org]
Instead of asking why a piece of software is using "1970s technology,"
start asking why software is ignoring 30 years of accumulated wisdom.

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