Date: Mon, 9 Apr 2007 23:28:10 -0400 From: Kris Kennaway <kris@obsecurity.org> To: Doug Poland <doug@polands.org> Cc: freebsd-current@freebsd.org, Kris Kennaway <kris@obsecurity.org> Subject: Re: new ZFS sysctls not working? Message-ID: <20070410032810.GA40459@xor.obsecurity.org> In-Reply-To: <20070410030712.GB94010@polands.org> References: <20070409232654.GA93109@polands.org> <20070410010532.GA38535@xor.obsecurity.org> <20070410025020.GA94010@polands.org> <20070410025855.GA39926@xor.obsecurity.org> <20070410030712.GB94010@polands.org>
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--3MwIy2ne0vdjdPXF Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Apr 09, 2007 at 10:07:12PM -0500, Doug Poland wrote: > On Mon, Apr 09, 2007 at 10:58:55PM -0400, Kris Kennaway wrote: > > On Mon, Apr 09, 2007 at 09:50:20PM -0500, Doug Poland wrote: > > > On Mon, Apr 09, 2007 at 09:05:32PM -0400, Kris Kennaway wrote: > > > > On Mon, Apr 09, 2007 at 06:26:54PM -0500, Doug Poland wrote: > > > > > Hello, > > > > >=20 > > > > > It would appear that the new sysctls for ZFS > > > > > (vfs.zfs.arc_max/min) are not "taking". i.e., > > > > >=20 > > > > > # cat /boot/loader.conf > > > > > vfs.zfs.arc_max=3D134217728 > > > > > vfs.zfs.arc_min=3D134217728 > > > > >=20 > > > > > # sysctl -a | grep vfs.zfs.arc > > > > > vfs.zfs.arc_max: 67108864 > > > > > vfs.zfs.arc_min: 67108864 > > > > >=20 > > > > > This is after a fresh cvsup run today around 10:00 CDT. > > > >=20 > > > > Please provide more details of your system, e.g. sysctl > > > > vm.kmem_size. > > > >=20 > > > FreeBSD 7.0-CURRENT #0: Mon Apr 9 12:55:54 CDT 2007 > > > djp@seth.polands.org:/usr/obj/usr/src/sys/GENERIC > > > WARNING: WITNESS option enabled, expect reduced performance. > > > Timecounter "i8254" frequency 1193182 Hz quality 0 > > > CPU: AMD Athlon(tm) processor (1403.19-MHz 686-class CPU) > > > Origin =3D "AuthenticAMD" Id =3D 0x644 Stepping =3D 4 > > > Features=3D0x183f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PG= E,MCA,CMOV,PAT,PSE36,MMX,FXSR> > > > AMD Features=3D0xc0440800<SYSCALL,<b18>,MMX+,3DNow!+,3DNow!> > > > real memory =3D 259981312 (247 MB) > > > avail memory =3D 240451584 (229 MB) > > >=20 > > > # sysctl -a | grep vm.kmem_size > > > vm.kmem_size: 80662528 > > > vm.kmem_size_max: 335544320 > > > vm.kmem_size_scale: 3 > >=20 > > Yeah, you don't even have 128 MB of kmem available (only 76 MB), so > > it's no surprise zfs refused to use that much ;-) > >=20 > I was attempting to "portsnap extract" to a two disk ZFS mirror. It > would appear my ability to test ZFS is severly limited on this > particular hardware configuration. Sorry for the noise... Well you can increase your kmem a bit, but yeah, it's probably not going to perform very well because you're taking it away from userland so there will be increased swap activity too. Kris --3MwIy2ne0vdjdPXF Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (FreeBSD) iD8DBQFGGwRKWry0BWjoQKURAotRAKD0PXd8va5qt/OJHDTfeZ7sNSU1/wCg4qft Mwo/1jFncUT3MC1ygAYPElc= =B4ot -----END PGP SIGNATURE----- --3MwIy2ne0vdjdPXF--
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