From owner-freebsd-fs@freebsd.org Tue Nov 20 20:45:42 2018 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 2D3A6113D56C; Tue, 20 Nov 2018 20:45:42 +0000 (UTC) (envelope-from markjdb@gmail.com) Received: from mail-it1-x135.google.com (mail-it1-x135.google.com [IPv6:2607:f8b0:4864:20::135]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 6FE9E82D2A; Tue, 20 Nov 2018 20:45:41 +0000 (UTC) (envelope-from markjdb@gmail.com) Received: by mail-it1-x135.google.com with SMTP id g85so5489123ita.3; Tue, 20 Nov 2018 12:45:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=eMbHUZxy8M2nGi8S2ZDf+v6rUFOgqm9t31QXsREIh1c=; b=r9jmaEsqh5w2t+TevMnsWRijLiWUIYicnqEs+KhvLMMs7ll+5BzAQz7DCMmOXRWs8f Yyate8KMkqpkd7jtKOndVMlY62JvrCL40Veuza+LFXJVO28lR5pzx6WMJAWRfO+QSEq4 qMAE7j6jWzmBN7WjNQQPMAIuxaUOLjLeV5DIz7XaWqwBahlklMuedldNw7X+lcx/F6kh Lyxv54phSIFc6OeuCSDKnx7RTkoTAlW1801Sx47bs6ImuSf0Ao6I4BHA8CiP33kX5gnD yFk5BJ/B01L3nplyJ/vLGOhXtRl/PK5BfmLsHGQqbsrCowQf/DAhxbsw573K/hWZsQIZ 3/lg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition:in-reply-to:user-agent; bh=eMbHUZxy8M2nGi8S2ZDf+v6rUFOgqm9t31QXsREIh1c=; b=mkup9hgjesgi9YXveFGcnMBs228rT3PJuwL+zKRZLd/JyEQ15VA1lqbeO6nqOjfaAy QfSTPMjcgbTvLYQTv2TVynjn+RFsxo+KswCJLqilmLlRChvhMyb3HvMJ5LNBikFGO+W2 /xykFDEXW9NEhPEq3Alg2SBdvgZ6k2V8l7yFzF9gcfezs/dxNSRbQ//JeGzKzkflFXpt 2/+2BdFLObI0ck5HXhydFDe0aHKG1U9GtGL+rtkJkoiCWb0X3TCK/WGr05irUyZFGeAs syHKtEiTH4Yjwr9yhazHG5K/+qm8yya2uIyHDiQmalxsacj1XAdFVUsVXMdPTHR4IAoJ WCrg== X-Gm-Message-State: AA+aEWYClrO4dZGM69G95t6122Uh/tEjCx5XdhkXbJ/H9AOoF6JkfM6a twiLxXQx1rrI28pWQYsfkbs24nYhTcM= X-Google-Smtp-Source: AJdET5dyc5Fzqbdi6w8yYkly9lrgQsl+0gdYwvmYMWujVXZeTzMubVZGDGwg5FGU7b1pezw+sAkljA== X-Received: by 2002:a02:9911:: with SMTP id r17-v6mr3222502jaj.132.1542746740209; Tue, 20 Nov 2018 12:45:40 -0800 (PST) Received: from raichu (toroon0560w-lp130-07-64-229-95-98.dsl.bell.ca. [64.229.95.98]) by smtp.gmail.com with ESMTPSA id v74sm13885641ita.27.2018.11.20.12.45.38 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 20 Nov 2018 12:45:39 -0800 (PST) Sender: Mark Johnston Date: Tue, 20 Nov 2018 15:45:37 -0500 From: Mark Johnston To: Lev Serebryakov Cc: FreeBSD stable , FreeBSD FS Subject: Re: Where is my memory on 'fresh' 11-STABLE? It should be used by ARC, but it is not used for it anymore. Message-ID: <20181120204537.GB2630@raichu> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) X-Rspamd-Queue-Id: 6FE9E82D2A X-Spamd-Result: default: False [-4.85 / 15.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; R_DKIM_ALLOW(-0.20)[gmail.com]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; R_SPF_ALLOW(-0.20)[+ip6:2607:f8b0:4000::/36]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; RCVD_TLS_LAST(0.00)[]; DMARC_NA(0.00)[freebsd.org]; NEURAL_HAM_LONG(-1.00)[-0.999,0]; RCVD_COUNT_THREE(0.00)[3]; IP_SCORE(-2.16)[ip: (-6.71), ipnet: 2607:f8b0::/32(-2.37), asn: 15169(-1.60), country: US(-0.09)]; TO_DN_ALL(0.00)[]; MX_GOOD(-0.01)[cached: alt3.gmail-smtp-in.l.google.com]; DKIM_TRACE(0.00)[gmail.com:+]; RCVD_IN_DNSWL_NONE(0.00)[5.3.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.b.8.f.7.0.6.2.list.dnswl.org : 127.0.5.0]; NEURAL_HAM_SHORT(-0.98)[-0.981,0]; FORGED_SENDER(0.30)[markj@freebsd.org,markjdb@gmail.com]; MID_RHS_NOT_FQDN(0.50)[]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; FROM_NEQ_ENVFROM(0.00)[markj@freebsd.org,markjdb@gmail.com]; SUBJECT_HAS_QUESTION(0.00)[] X-Rspamd-Server: mx1.freebsd.org 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: Tue, 20 Nov 2018 20:45:42 -0000 On Tue, Nov 20, 2018 at 03:42:24PM +0300, Lev Serebryakov wrote: > > I have server which is mostly torrent box. It uses ZFS and equipped > with 16GiB of physical memory. It is running 11-STABLE (r339914 now). > > I've updated it to r339914 from some 11.1-STABLE revision 3 weeks ago. > > I was used to see 13-14GiB of memory in ZFS ARC and it was Ok. > Sometimes it "locks" under heavy disk load due to ARC memory pressure, > but it was bearable, and as ZFS is main reason this server exists, I > didn't limit ARC. > > But new revision (r339914) shows very strange behaivor: ARC is no more > than 4GiB, but kernel has 15GiB wired: > > Mem: 22M Active, 656M Inact, 62M Laundry, 15G Wired, 237M Free > ARC: 4252M Total, 2680M MFU, 907M MRU, 3680K Anon, 15M Header, 634M Other > 2789M Compressed, 3126M Uncompressed, 1.12:1 Ratio > > It is typical numbers for last week: 15G wired, 237M Free, but only > 4252M ARC! > > Where is other 11G of memory?! > > I've checked USED and FREE in "vmstat -z" output and got this: > > $ vmstat -z | tr : , | awk -F , '1{print $2*$4,$2*$5,$1}' | sort -n | > tail -20 > 23001088 9171456 MAP ENTRY > 29680800 8404320 VM OBJECT > 34417408 10813952 256 > 36377964 2665656 S VFS Cache > 50377392 53856 sa_cache > 50593792 622985216 zio_buf_131072 > 68913152 976896 mbuf_cluster > 73543680 7225344 mbuf_jumbo_page > 92358552 67848 zfs_znode_cache > 95731712 51761152 4096 > 126962880 159581760 dmu_buf_impl_t > 150958080 233920512 mbuf_jumbo_9k > 165164600 92040 VNODE > 192701120 30350880 UMA Slabs > 205520896 291504128 zio_data_buf_1048576 > 222822400 529530880 zio_data_buf_524288 > 259143168 293476864 zio_buf_512 > 352485376 377061376 zio_buf_16384 > 376109552 346474128 dnode_t > 2943016960 5761941504 abd_chunk > $ > > And total USED/FREE numbers is very strange for me: > > $ vmstat -z | tr : , | awk -F , '1{u+=$2*$4; f+=$2*$5} END{print u,f}' > 5717965420 9328951088 > $ > > So, only ~5.7G is used and 9.3G is free! But why this memory is not > used by ARC anymore and why is it wired and not free? Could you show the output of "vmstat -s" when in this state?