Date: Thu, 13 Dec 2001 14:48:29 +0000 (EDT) From: Michael Imamura <gte255n@prism.gatech.edu> To: Joe Koenig <joe@jwebmedia.com> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: shmmax? Message-ID: <Pine.SOL.4.21.0112131443180.9407-100000@acmex.gatech.edu> In-Reply-To: <3C18B398.CFCE144A@jwebmedia.com>
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On Thu, 13 Dec 2001, Joe Koenig wrote:
> I was reading over an article about optimizing PostgreSQL. The article
> is specific to RedHat Linux 7.1, and refers to the amount of shmmax (max
> shared memory). Is there a similiar setting for FreeBSD? Thanks,
This can be adjusted in the kernel config; here are the appropriate lines
out of LINT:
options SYSVSHM # include support for shared memory
options SHMMAXPGS=1025 # max amount of shared memory pages (4k on i386)
options SHMALL=1025 # max amount of shared memory (bytes)
options SHMMAX="(SHMMAXPGS*PAGE_SIZE+1)"
# max shared memory segment size (bytes)
options SHMMIN=2 # min shared memory segment size (bytes)
options SHMMNI=33 # max number of shared memory identifiers
options SHMSEG=9 # max shared memory segments per process
Adjusting SHMMAXPGS and SHMALL seem to be the way to go; I've avoided
touching the other settings.
- Michael Imamura zoogie@lugatgt.org
LUG@GT Web Guy http://www.lugatgt.org/
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