Date: Mon, 21 Mar 2005 17:56:21 -0600 From: Dan Nelson <dnelson@allantgroup.com> To: Andrew Robinson <andrewr@uidaho.edu> Cc: freebsd-questions@freebsd.org Subject: Re: Increasing system message buffer size Message-ID: <20050321235620.GL5243@dan.emsphone.com> In-Reply-To: <bf3636beeee1.beeee1bf3636@uidaho.edu> References: <bf3636beeee1.beeee1bf3636@uidaho.edu>
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In the last episode (Mar 21), Andrew Robinson said: > I'm working on a problem that would benefit from verbose logging of > the boot process. Unfortunately my logging is SO verbose that it > fills up the available system buffer. I'm trying to figure out how > to change the buffer size. I'm on 5.3 Stable. > > It looks like one way to do it might be to recompile the kernel, with > > options MSGBUF_SIZE=65536 > > set. Is that the best way? If so, what is the default size of the > buffer? I checked NOTES in /usr/src/sys/i386/conf but couldn't find > any reference to it. Yes, that's the only way to do it. It might be possible to convert it into a tunable (which would let you set it in /boot/loader.conf), but I don't know how early in the boot process tunables are available. The default is 32768 (see /sys/sys/msbguf.h). -- Dan Nelson dnelson@allantgroup.com
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