From owner-freebsd-questions@FreeBSD.ORG Wed Oct 17 23:20:33 2012 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 7242080A for ; Wed, 17 Oct 2012 23:20:33 +0000 (UTC) (envelope-from grarpamp@gmail.com) Received: from mail-oa0-f54.google.com (mail-oa0-f54.google.com [209.85.219.54]) by mx1.freebsd.org (Postfix) with ESMTP id 359EA8FC08 for ; Wed, 17 Oct 2012 23:20:32 +0000 (UTC) Received: by mail-oa0-f54.google.com with SMTP id n9so10677346oag.13 for ; Wed, 17 Oct 2012 16:20:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=sksiw6SYiN29hMBbAEmCpzh9r1QgafReyhxg2O00j9s=; b=HTswvw3BnjawGQ93YEB7SerDimz3HNdsbDXLO/5qarBq5tPUlIneoXzb73QWY94/7q ihhELlmpyrCXap1vyJuNRpxTwahpElNnx5yTHuA/ZztoS91PjmolKXDiX5h7WJfIzU+W cewxFiRBUlDzIsm1Z0b/jUDdcNt1FZPFkLPH4vJFpO1sccKuu3xIET8fpaRO6921GTlL aCZSqG8VfZ7tEoom9CZHVz/yubbvDphTlyVD8R5xz0M16BhwkY1lE9Q9ugzamMl2IO40 ttj32RvIhOc/aV9cysZKnO73ODrtmpUvsheIHQN07WwpLY8XBAaxW4WD0aUGUpfqi+Uf z06g== MIME-Version: 1.0 Received: by 10.60.3.6 with SMTP id 6mr17400204oey.117.1350516032281; Wed, 17 Oct 2012 16:20:32 -0700 (PDT) Received: by 10.76.152.129 with HTTP; Wed, 17 Oct 2012 16:20:32 -0700 (PDT) Date: Wed, 17 Oct 2012 19:20:32 -0400 Message-ID: Subject: vm.kmem_size From: grarpamp To: freebsd-questions@freebsd.org Content-Type: text/plain; charset=UTF-8 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 17 Oct 2012 23:20:33 -0000 How small and big can I realistically push vm.kmem_size to on this platform with RELENG_8 GENERIC before kernel crashes? CPU: Intel(R) Pentium(R) 4 CPU real memory = 2147483648 (2048 MB) avail memory = 2085355520 (1988 MB) If it matters, I am using defaults for ZFS and everything else. First set is barely primed. Second set is well used. I often see another 100M of wired mem up to 675M'ish. # booted vm.kmem_map_free: 630730752 vm.kmem_map_size: 19271680 vm.kmem_size_scale: 3 vm.kmem_size_max: 335544320 vm.kmem_size_min: 0 vm.kmem_size: 650000000 vm.kvm_free: 54521856 vm.kvm_size: 1073737728 vfs.zfs.mfu_size: 482816 vfs.zfs.mru_size: 2186240 vfs.zfs.anon_size: 16384 vfs.zfs.arc_meta_limit: 101562500 vfs.zfs.arc_meta_used: 3519512 vfs.zfs.arc_min: 50781250 vfs.zfs.arc_max: 406250000 kstat.zfs.misc.arcstats.p: 203125000 kstat.zfs.misc.arcstats.c: 406250000 kstat.zfs.misc.arcstats.c_min: 50781250 kstat.zfs.misc.arcstats.c_max: 406250000 kstat.zfs.misc.arcstats.size: 3532312 kstat.zfs.misc.arcstats.hdr_size: 58324 kstat.zfs.misc.arcstats.data_size: 2685440 kstat.zfs.misc.arcstats.other_size: 788548 Mem: 1660K Active, 2692K Inact, 31M Wired, 8K Cache, 7200K Buf, 1958M Free ITEM SIZE LIMIT USED FREE REQUESTS FAILURES zfs_znode_cache: 268, 0, 43, 13, 43, 0 Type InUse MemUse HighUse Requests Size(s) solaris 6742 6505K - 38161 16,32,64,128,256,512,1024,2048,4096 # used vm.kmem_map_free: 145154048 vm.kmem_map_size: 481452032 vm.kmem_size_scale: 3 vm.kmem_size_max: 335544320 vm.kmem_size_min: 0 vm.kmem_size: 650000000 vm.kvm_free: 46133248 vm.kvm_size: 1073737728 vfs.zfs.mfu_size: 131460608 vfs.zfs.mru_size: 217134080 vfs.zfs.anon_size: 262144 vfs.zfs.arc_meta_limit: 101562500 vfs.zfs.arc_meta_used: 108829156 vfs.zfs.arc_min: 50781250 vfs.zfs.arc_max: 406250000 kstat.zfs.misc.arcstats.p: 228111557 kstat.zfs.misc.arcstats.c: 374401883 kstat.zfs.misc.arcstats.c_min: 50781250 kstat.zfs.misc.arcstats.c_max: 406250000 kstat.zfs.misc.arcstats.size: 364867900 kstat.zfs.misc.arcstats.hdr_size: 2751420 kstat.zfs.misc.arcstats.data_size: 348670976 kstat.zfs.misc.arcstats.other_size: 13445504 Mem: 206M Active, 82M Inact, 571M Wired, 21M Cache, 19M Buf, 1112M Free ITEM SIZE LIMIT USED FREE REQUESTS FAILURES zfs_znode_cache: 268, 0, 10419, 123, 12786, 0 Type InUse MemUse HighUse Requests Size(s) solaris 206261 391419K - 11430057 16,32,64,128,256,512,1024,2048,4096