Date: Wed, 23 Nov 2005 12:29:33 -0500 From: ender <ender@tog.net> To: freebsd-performance@freebsd.org Subject: Re: mmap() Message-ID: <4384A6FD.2090201@tog.net> In-Reply-To: <20051123171154.60414.qmail@web30307.mail.mud.yahoo.com> References: <20051123171154.60414.qmail@web30307.mail.mud.yahoo.com>
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Arne Wörner wrote: >--- Michael Conlen <m@obmail.net> wrote: > > >>I'm trying to tune the system to allow very large >>mmap()'s in a >> >> >> >I had a similar problem with shared memory. > >I found an option in /sys/conf/NOTES. > >I think it could help in your case, if u increase >% options MAXDSIZ=(1024UL*1024*1024) >% options MAXSSIZ=(128UL*1024*1024) >% options DFLDSIZ=(1024UL*1024*1024) >apropriately. > >E. g. in your /sys/<arch>/conf/<kernel name> >options MAXDSIZ=(2000UL*1024*1024) > >But I dont know, if that is a good idea... Maybe you should use >nextboot(8) in case your box does not like the new kernel... :-) > >-Arne > > > > > > > see /boot/defaults/loader.conf or man loader.conf. I would also suggest not using your entire amount of memory in these settings. Freebsd was crashing when i set these limits to 3G. 6.0-RELEASE #0 SMP kernel. This box has 3G physical memory. kern.dfldsiz=2147483648 # Set the initial data size limit # 2G kern.dflssiz=2147483648 # Set the initial stack size limit # 2G kern.maxdsiz=2147483648 # Set the max data size # 2G kern.maxtsiz=2147483648 # Set the max text size # 2G kern.maxssiz=2147483648 # Set the max stack size # 2G
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