> Date: Tue, 2 Dec 2008 19:33:00 +0300 > From: "Alexandr Pakhomov" <[EMAIL PROTECTED]> > Sender: [EMAIL PROTECTED] > > On Tue, Dec 2, 2008 at 5:12 PM, Mike Tancsa <[EMAIL PROTECTED]> wrote: > > > At 08:38 AM 12/2/2008, Kostik Belousov wrote: > > > >> > > >> > mdconfig -a -t malloc -s 1800M > >> You cannot have ~ 2Gb of kernel memory allocated for md, at least not on > >> i386. > >> > > > > Thanks, how do I find out what the limit is on a machine ? Is it > > vm.kvm_size ? > > > > > > ---Mike > > _______________________________________________ > > freebsd-stable@freebsd.org mailing list > > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > > To unsubscribe, send any mail to "[EMAIL PROTECTED]" > > > > Try tune both vm.kmem_size and vm.kmem_size_max via /boot/loader.conf. They > are equal to 330M by default.
Mike, Let me second Kris's suggestion. I can think of very few cases where malloc backed is in any way better than swap backed. Many people assume that swap-backed performance is better, but this is only the case if you run out of memory (and that is full memory, not kvm). md is still RAM based and very fast. The current mdconfig should be defaulting to swap-backed devices, but I don't see any indication of that in the man page, so I may be wrong. -- R. Kevin Oberman, Network Engineer Energy Sciences Network (ESnet) Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) E-mail: [EMAIL PROTECTED] Phone: +1 510 486-8634 Key fingerprint:059B 2DDF 031C 9BA3 14A4 EADA 927D EBB3 987B 3751
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