Date: Wed, 12 May 2010 15:36:59 +0300 From: "Alexander V. Ribchansky" <shurik@zk.informjust.ua> To: Pawel Jakub Dawidek <pjd@FreeBSD.org> Cc: freebsd-fs@freebsd.org Subject: Re: Freebsd 8.0 kmem map too small Message-ID: <4BEAA0EB.3010407@zk.informjust.ua> In-Reply-To: <20100511223813.GB3044@garage.freebsd.pl> References: <4BE95F1F.5090009@zk.informjust.ua> <20100511223813.GB3044@garage.freebsd.pl>
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12.05.2010 01:38, Pawel Jakub Dawidek пишет: > -skip- > Could you try the following patch without disabling UMA? > > http://people.freebsd.org/~pjd/patches/vfs_subr.c.7.patch > > It works quite well for me. > > Also we still don't have back-pressure mechanism when arc_meta_limit is > exceeded. OpenSolaris frees namecache entires then and we currently do > nothing. I'll experiment with a bit and let you know if the patch above > doesn't fix your problem still. > > I apply you patch on today's STABLE. with 2Gb of ram m.kmem_size_max: 1073741824 vm.kmem_size_min: 0 vm.kmem_size: 1073741824 hw.physmem: 2125430784 hw.usermem: 1291554816 hw.realmem: 2146959360 vfs.zfs.arc_max: 268435456 it survive two sequent buildworld & buildkernel. Wired memory is 791M. Without UMA Wired memory was around 500M on THE SAME settings. Could you please explain as for nOOb, what we get with UMA, and why it uses MORE Wired memory? Is it for better perfomance or for what? What is your recomended tuning for i386 FreeBSD-8 on 2Gb ram typical desktop? And.. again, thank you for your great work on ZFS!! You are MONSTER! :) -- AVR39-RIPE
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