Date: Tue, 5 Sep 2000 16:06:48 -0500 (CDT) From: Guy Helmer <ghelmer@cs.iastate.edu> To: "Paul J. Dolan" <pdolan@metalab.unc.edu> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: Increasing Shared Memory in 4.1 kernel Message-ID: <Pine.HPX.4.05.10009051602010.10351-100000@popeye.cs.iastate.edu> In-Reply-To: <Pine.GSO.4.21.0009051627260.12715-100000@titan.oit.unc.edu>
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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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