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[79.66.147.78]) by smtp.gmail.com with ESMTPSA id f23sm8490060wmc.3.2020.09.10.21.17.02 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 10 Sep 2020 21:17:02 -0700 (PDT) Subject: time sysctl kstat.zfs.misc.dbufs | wc (was: OpenZFS and L2ARC) To: FreeBSD CURRENT Cc: Stefan Esser , Matthew Macy References: <7d54dc30-b8b1-a127-ec39-9fb759c8a55d@gmail.com> From: Graham Perrin Message-ID: Date: Fri, 11 Sep 2020 05:17:01 +0100 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:68.0) Gecko/20100101 Thunderbird/68.12.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US X-Rspamd-Queue-Id: 4BnjBn3qFjz3XNb X-Spamd-Bar: --- X-Spamd-Result: default: False [-3.97 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; FREEMAIL_FROM(0.00)[gmail.com]; R_SPF_ALLOW(-0.20)[+ip6:2a00:1450:4000::/36]; RCVD_COUNT_THREE(0.00)[3]; TO_DN_ALL(0.00)[]; DKIM_TRACE(0.00)[gmail.com:+]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; NEURAL_HAM_SHORT(-1.03)[-1.029]; RECEIVED_SPAMHAUS_PBL(0.00)[79.66.147.78:received]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_ENVFROM(0.00)[gmail.com]; MID_RHS_MATCH_FROM(0.00)[]; ASN(0.00)[asn:15169, ipnet:2a00:1450::/32, country:US]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-0.95)[-0.950]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20161025]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-0.99)[-0.993]; MIME_GOOD(-0.10)[text/plain]; DWL_DNSWL_NONE(0.00)[gmail.com:dkim]; RCVD_IN_DNSWL_NONE(0.00)[2a00:1450:4864:20::435:from]; RCVD_TLS_ALL(0.00)[]; MAILMAN_DEST(0.00)[freebsd-current] X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 11 Sep 2020 04:17:06 -0000 On 09/09/2020 07:46, Stefan Esser wrote: > … an annoyance that I had noticed before but now have > tracked down: > > $ time sysctl kstat.zfs.misc.dbufs | wc >    55327 2047031 16333472 > > real    0m16,446s > user    0m0,055s > sys    0m16,397s > > … Here, I get much scrolling but no output from time: root@momh167-gjp4-8570p:~ # date ; uname -v Fri Sep 11 05:11:33 BST 2020 FreeBSD 13.0-CURRENT #64 r365364: Sun Sep  6 01:38:18 BST 2020 root@momh167-gjp4-8570p:/usr/obj/usr/src/amd64.amd64/sys/GENERIC-NODEBUG root@momh167-gjp4-8570p:~ # time sysctl kstat.zfs.misc.dbufs | wc    34699 1283795 10181844 root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # 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root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ # root@momh167-gjp4-8570p:~ #