From owner-freebsd-fs@freebsd.org Sat Mar 2 12:07:51 2019 Return-Path: Delivered-To: freebsd-fs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 9E66A152029D for ; Sat, 2 Mar 2019 12:07:51 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id 382EA8BAEF for ; Sat, 2 Mar 2019 12:07:51 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.ysv.freebsd.org (Postfix) id F00481520299; Sat, 2 Mar 2019 12:07:50 +0000 (UTC) Delivered-To: fs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id C89081520296 for ; Sat, 2 Mar 2019 12:07:50 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.ysv.freebsd.org (mxrelay.ysv.freebsd.org [IPv6:2001:1900:2254:206a::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.ysv.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 43D0E8BAEC for ; Sat, 2 Mar 2019 12:07:50 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.ysv.freebsd.org (Postfix) with ESMTPS id 657B711D1E for ; Sat, 2 Mar 2019 12:07:49 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id x22C7n8Y085847 for ; Sat, 2 Mar 2019 12:07:49 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id x22C7n9m085840 for fs@FreeBSD.org; Sat, 2 Mar 2019 12:07:49 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: fs@FreeBSD.org Subject: [Bug 229670] Too many vnodes causes ZFS ARC to exceed limit vfs.zfs.arc_max (high ARC "Other" usage) Date: Sat, 02 Mar 2019 12:07:46 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 11.2-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Many People X-Bugzilla-Who: grahamperrin@gmail.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: fs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 02 Mar 2019 12:07:51 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D229670 --- Comment #19 from Graham Perrin --- A year or so ago, before I was aware of this bug, I had a sense that things weren't right on a notebook with 15.9 GiB memory. Probably 12.0-CURRENT at = the time.=20 IIRC I chose to set vfs.zfs.arc_max to around 2 G. (I can't recall what mad= e me choose that figure =E2=80=A6 something in bug 187594, maybe. I vaguely reca= ll 2 G being around half of the default but that seems inconsistent with what I now read= at .)=20 Whilst I didn't take measurements, the end result was pleasing.=20 With a cleaner installation of 13.0-CURRENT (~2018-12), I have not (yet) fe= lt the need to change vfs.zfs.arc_max ---- Today:=20 grahamperrin@momh167-gjp4-8570p:~ % date ; uname -v ; uptime Sat 2 Mar 2019 11:43:54 GMT FreeBSD 13.0-CURRENT r344443 GENERIC-NODEBUG=20 11:43a.m. up 41 mins, 6 users, load averages: 1.02, 0.70, 0.61 grahamperrin@momh167-gjp4-8570p:~ % sysctl -a | grep vfs.zfs.arc vfs.zfs.arc_min_prescient_prefetch_ms: 6 vfs.zfs.arc_min_prefetch_ms: 1 vfs.zfs.arc_meta_strategy: 0 vfs.zfs.arc_meta_limit: 3883606016 vfs.zfs.arc_free_target: 86433 vfs.zfs.arc_kmem_cache_reap_retry_ms: 0 vfs.zfs.arc_grow_retry: 60 vfs.zfs.arc_shrink_shift: 7 vfs.zfs.arc_average_blocksize: 8192 vfs.zfs.arc_no_grow_shift: 5 vfs.zfs.arc_min: 1941803008 vfs.zfs.arc_max: 15534424064 grahamperrin@momh167-gjp4-8570p:~ % sysctl -a | grep vnode kern.maxvnodes: 348816 kern.ipc.umtx_vnode_persistent: 0 kern.minvnodes: 87204 Syncing disks, vnodes remaining... 0 0 0 0 0 0 done Syncing disks, vnodes remaining... 0 0 0 0 0 0 done Syncing disks, vnodes remaining... 0 0 0 0 0 done vm.vnode_pbufs: 512 vm.stats.vm.v_vnodepgsout: 3703 vm.stats.vm.v_vnodepgsin: 126117 vm.stats.vm.v_vnodeout: 1842 vm.stats.vm.v_vnodein: 12321 vfs.freevnodes: 9195 vfs.wantfreevnodes: 87204 vfs.vnodes_created: 19046 vfs.numvnodes: 16690 vfs.cache.cache_lock_vnodes_cel_3_failures: 0 vfs.ncpurgeminvnodes: 512 debug.vnode_domainset: debug.sizeof.vnode: 480 debug.fail_point.status_fill_kinfo_vnode__random_path: off debug.fail_point.fill_kinfo_vnode__random_path: off grahamperrin@momh167-gjp4-8570p:~ %=20 ---- Now added to /etc/sysctl.conf : vfs.zfs.arc_max=3D"2147483648" If I'm to add a setting for kern.maxvnodes =E2=80=93for test purposes =E2= =80=93 what would you suggest? TIA --=20 You are receiving this mail because: You are the assignee for the bug.=