Date: Tue, 5 Sep 2000 18:04:54 -0400 (EDT) From: "Paul J. Dolan" <pdolan@metalab.unc.edu> To: Guy Helmer <ghelmer@cs.iastate.edu> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: Increasing Shared Memory in 4.1 kernel Message-ID: <Pine.GSO.4.21.0009051757160.12715-100000@titan.oit.unc.edu> In-Reply-To: <Pine.HPX.4.05.10009051602010.10351-100000@popeye.cs.iastate.edu>
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Hi Guy, Thanks for the quick response. Unfortunately, I don't see kern.ipc.shmmax kern.ipc.shmall as valid parameters in `man sysctl` If they do not show up as available in my sysctl manual are they actually available? Setting these parameters and rebooting produced no positive results. FreeBSD 4.0-RELEASE FreeBSD 4.0-RELEASE #0: Tue Sep 5 15:26:22 EDT 2000 i386 Do you have any further advice? Thanks, Paul J. Dolan On Tue, 5 Sep 2000, Guy Helmer wrote: > On Tue, 5 Sep 2000, Paul J. Dolan wrote: > > > Hi, > > > > I'm trying to increase the default Shared Memory > > Max Segment Size in the 4.1 kernel. > > > > Right now the limit seems to be 4 MB. > > Does anyone have notes on how to rebuild > > the kernel to allow for up to 64 MB segments? > > I've made similar changes without having to rebuild the kernel by changing > the sysctl parameters via /etc/sysctl.conf: > > kern.ipc.shmmax=67108864 > kern.ipc.shmall=32768 > > These particular values for these parameters allow for about 50 megabytes, > according to a program that searches for the largest block of shared > memory that it can allocate. Try increasing these values a bit so you can > obtain 64MB segments... > > Hope this helps, > Guy > > Guy Helmer, Ph.D. Candidate, Iowa State University Dept. of Computer Science > Research Assistant, Dept. of Computer Science --- ghelmer@cs.iastate.edu > http://www.cs.iastate.edu/~ghelmer > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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