From owner-freebsd-questions@freebsd.org Thu Aug 20 08:58:32 2020 Return-Path: Delivered-To: freebsd-questions@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 81DB23B6BAB for ; Thu, 20 Aug 2020 08:58:32 +0000 (UTC) (envelope-from liedtke@punkt.de) Received: from mail.punkt.de (mail.punkt.de [217.29.41.227]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4BXJTg1d2Cz46V5 for ; Thu, 20 Aug 2020 08:58:30 +0000 (UTC) (envelope-from liedtke@punkt.de) Received: from [217.29.46.71] (kagate.punkt.de [217.29.33.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.punkt.de (Postfix) with ESMTPSA id 1B8DD2F8D5 for ; Thu, 20 Aug 2020 10:58:23 +0200 (CEST) Subject: Re: Swapping when memory is idle?? To: freebsd-questions@freebsd.org References: From: Lars Liedtke Autocrypt: addr=liedtke@punkt.de; keydata= mQINBFqZsngBEAC2qgHHKyTYnOxr/giErojNdDHd4x+8snzW0F6cInzagVySiM6+htoBmUsX uIUCrbsdS4jkADo9fIs0DHfmNWs1Fgp5BWlgNIYV3+P6K756YMFlr/Q2p3ddsJ/YZ5rnkWE5 bNMOQgY9Hdl0kPB1leWy0gRyVjbwU0mv6JimA+Y4e43TG8qKGd4n26h6dUirDjjrc4esMUjz cPMobbcStYR79D2llJWdSVeYgg40E5MeExATTC7sNL9RJPcEOKHCYI1Kn85nvJw98iFyMYlh lcSKqUJhpJ20D7U0DOFJKzY/Ox0+nmmcUchspvSGgAeuBV+fvSJYH1yQnCzz+T2uBcO8JVPO aNKuZ25ruN4ILN5b3dhCTS/aR/A35QyGb9N2SR9Hb0o1L7FEu33JDT+kUeH+4sOSbuNFtadF GyfS+eCfpQvw4/Xua4nGwKkKe35ht3eeuQvzFaxNac1lvMIaHRcq93Sh3k9emVCYP7s4MhA1 OR0THAM5VHgfYIg17m1gvKnqFtgA0AmCDBn8PhYFEEUZWQ5dKQCcfylv8RTrv5qK5iiHBNjJ Mo83ZRb/o+OPzq3Rzt7VM0zZL0jdIGJ2Gn3mD2IybHv+TfcdGtF7RE0/TVacv1TdCn8F2L8q nVkTP22rdyqicydS2qUGxFTfoRAaO29fWGrW77HFyycROP4TbQARAQABtB9MYXJzIExpZWR0 a2UgPGxpZWR0a2VAcHVua3QuZGU+iQI9BBMBCAAnBQJambJ4AhsjBQkJZgGABQsJCAcCBhUI CQoLAgQWAgMBAh4BAheAAAoJEN1tdE7BYoBiVX8QALOtAPS1Nf9qOkn4Mox7CfM7QYcu4XTg SSpYrfr3p27k09NG8M3a+70PShZeK57J4occkHPu7oRAFgOcLSZkZ1bN0Ir4D/6+bh2fMh0F lYNgzYmdukn/7IUlD+NkgPafny1MOFOD3RREKVbVrvnMID0gx4tzEJZq7B2VbhJ7Njdh3PFj IzigzJEH9fHKDv2Taz6Q/qN5TwJffTF+awGdueIPEzBS/V0P83g0M+5tfRAsI4nV+Jxwi6gb rp24rTe9cuctFJpRswzrmR+kCHvhzhC6XGZJBvpGTuQQoMunAKV5edlpAsuD2RV1YBEHGZKr rOP2weoZZdvJiU5QP+Re714p5atgg1ANuWEF3X1gU1op37zy3XH/1/Fi6MYiOovai5e/SqjP 7R2hoHBxoA9kHhEe8V5MaVcKE8cxRPzckRoBf11asyBy4QON4QTW4B9bxVeSkTaYZXp14OlF rK00yoOUJa6t3NKET68wDCvpwjNiDc4Sw5Uz1QHsMpcPVfC1nbVILO12bwlGd39qmDWi5wH3 NVgsJ3E09SobCqdrx1F6/pzHbq2I5uTa5kD9AUeIOkURwPK0ipWHvggxZlFf3b33zXwlFRYh JOYJN9zSMA1tvufpzh0ASvHrwjJWTALSUaoX9AHrw/R0PhsKuxX1XG5hsQkCUfKRrQzaJC3v 2jJkuQINBFqZsngBEAC4XuIGjNznjGatJX6HeJKtRXibysYTyvLM3Uql9I22dPLOLvATgpo2 msxRWVmPgfQGyxiurDm0LZVxtC1OLNG/BtKOSXyAZ36N0uin8aF0dB6vwYUNj2tkFfho6WQY kzhcxP3YX65UrbkU7I3ACTHUskQEGGX4M7rBPml89zBeFatEMEh0eLfzzzwecYFSiJM5nxGf SDMAqtkLe0H1aWsc0KuIPP5Y1wUaRWqDMk5qEoj02sY/sL6kMACJKxruDtZq61GAWVq6XpmV 8LyDXCXJgDh+mXuXLFTONt9HbJqMZ4iJjkHFaFoBcXkEAQEN5ZaQbKdFXpPRfu0YacHWfDRi huXr/PAPLrF01dKpu74Qih8QC6xmctbMhAPFq90jUoP2xUJ7/nYj4D8k6tA84ZPjReGmYzWQ mr8HPbUuWbLMsEpCFb+EeHPLGc6ItPw1sRCI6utzxLdpB3HONimjDjLfmvPS/mm5sClu76RM WVxw5uy6dmHiAJpycMUgnyOcAjLrQVlenObpAe5EVQmcazpWkpmuhnEl1bZQpaBftkzs5kKP 30s8dLlraBYyzxYytjUW+47pOWdYYvlF4yjp5cNyegXUQGnKgJH0p+UoMBAFplY3eNxP3mlA KT8oVY9w23+m8ZOsOPAlH1bhOvcsb9lkh1KOIUuUQxkk0NSOs5IpxQARAQABiQIlBBgBCAAP BQJambJ4AhsMBQkJZgGAAAoJEN1tdE7BYoBiZHQP/3q9o8ENdGo4K7daesUmiBuedP05uLDa TXxck+7K1IsX6GpTnUMyiYm7cu/IyrhlkZBe9TaLPaOo0HEN1W7jr8PLxKtbOwQ0dIHOIi60 4DrkqvFQKH1fARaq7YJJS7DRUin5n4/hcIpoSn273kEqby8BZpsL+kB8gtIbTtVpSwJfhobh dxHBi+NlMas7KYZ8aTuNOKJTS27PjQMfeEzf8u6Hb4JSsNYuQoyoSTyBkKksx3UbjXUvESKY I3uyTF7mVXJ0hvhX4QK3XOqwTfkT8NMzc/Xkdm9iaWrap74v9vfG1Vn8KhCRSQkyjbuDuocF PEtcIEJjU1WJmIdK60X03BJUYlH3CRthJOateCZWDTOSzBIZV+JV3cnV2kx9j9+nmnTQ1yQe bpnL7OtxSONH9t+gWHuGaIX5k/Bf2Ea7cSHLm8cvza25aIQRxfqmkBrR48U1lUSZTLULxzO3 OeJacjXWGewZzJl7ecobpgs4MM7yollhKzr+1sq2SMNcVL3s+8WfeZeCorm6GJLUiABHLlr/ ISWVpM730Jc0V9PyPFAsMPQRa24FsZl8goHvp/5khoM4cvNtplh64ny83ieRjCUnQgSdhkW9 fdYhqFgfJNCacLCGxZdGrEs3F5UAtUS2nplIbODUtYQcy3Qdd+rblY8A9UTPAUCxXVLi9K6i Gk7o Organization: punkt.de GmbH Message-ID: Date: Thu, 20 Aug 2020 10:58:21 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="QxWK0RwueBQHBM76LpgYvo0S8VsHqKLMc" X-Rspamd-Queue-Id: 4BXJTg1d2Cz46V5 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=pass (mx1.freebsd.org: domain of liedtke@punkt.de designates 217.29.41.227 as permitted sender) smtp.mailfrom=liedtke@punkt.de X-Spamd-Result: default: False [-2.01 / 15.00]; RCVD_TLS_ALL(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; R_SPF_ALLOW(-0.20)[+ip4:217.29.32.0/20]; MIME_GOOD(-0.20)[multipart/signed,multipart/mixed,text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-questions@freebsd.org]; TO_DN_NONE(0.00)[]; HAS_ATTACHMENT(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; HAS_ORG_HEADER(0.00)[]; ARC_NA(0.00)[]; NEURAL_SPAM_SHORT(0.41)[0.415]; DMARC_NA(0.00)[punkt.de]; NEURAL_HAM_MEDIUM(-1.03)[-1.027]; SIGNED_PGP(-2.00)[]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:+,3:~]; ASN(0.00)[asn:16188, ipnet:217.29.32.0/20, country:DE]; SUBJECT_ENDS_QUESTION(1.00)[]; MAILMAN_DEST(0.00)[freebsd-questions]; RCVD_COUNT_TWO(0.00)[2] X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 20 Aug 2020 08:58:32 -0000 This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --QxWK0RwueBQHBM76LpgYvo0S8VsHqKLMc Content-Type: multipart/mixed; boundary="qaJCjrV7oDyEhZGKcUrR3WJQ6CikkEfT4" --qaJCjrV7oDyEhZGKcUrR3WJQ6CikkEfT4 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Content-Language: de-DE Hello, I have something similiar sometimes, e.g. when I had VMs running and stopped them. If the Kernel swapped data during that time, it will not get back things from swap it does not need right now. But there may be more expirienced people being able to explain more. Cheers Lars Am 20.08.20 um 09:53 schrieb Odhiambo Washington: > Hola, > > I have a machine with 16GB RAM and not heavily used. > I see from `top` some things that I do not understand well. > Why would a system use swap when memory is idle? > > Output of top shown below: > > > last pid: 2272; load averages: 0.07, 0.19, 0.17 > > up 26+12:09= :26 > 10:49:04 > 155 processes: 1 running, 154 sleeping > CPU: 0.1% user, 0.0% nice, 0.0% system, 0.0% interrupt, 99.9% idle > Mem: 799M Active, 6262M Inact, 4964M Laundry, 2465M Wired, 1492M Buf, 1= 564M > Free > Swap: 3598M Total, 3530M Used, 67M Free, 98% Inuse > --=20 --- punkt.de GmbH Lars Liedtke =2Einfrastructure Kaiserallee 13a=09 76133 Karlsruhe Tel. +49 721 9109 500 https://infrastructure.punkt.de info@punkt.de AG Mannheim 108285 Gesch=C3=A4ftsf=C3=BChrer: J=C3=BCrgen Egeling, Daniel Lienert, Fabian St= ein --qaJCjrV7oDyEhZGKcUrR3WJQ6CikkEfT4-- --QxWK0RwueBQHBM76LpgYvo0S8VsHqKLMc Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Comment: Using GnuPG with Thunderbird - https://www.enigmail.net/ iQIzBAEBCAAdFiEEh0MJwNfa5yPlb1D23W10TsFigGIFAl8+Oy4ACgkQ3W10TsFi gGJ6Pw/8CEZ998P0yMAWXbQY2LXbpHwN8luJ8ZRDTOrp4/7ipj09+WqJMF3cbo50 JhWvJ4R5gY4mjEOPocW0+WkbX+4HJSUNhdYFZLdvAfUgfCnrFNXBNJV1cXboxfed mzw4YgXRyc3fH7U2H8kH4ITGLoA8Qawd2lde53LkMlwZtVGfrb3u5p/W7B8uKrEu oftBqZxDNn4zTfUAPrTnHaarag0s0qB5ACbcrlxS81+QlBt8R6JQzfXnw/m0FUsv kOk1Me4qEmJa/ONCYSNk2eHeEFcxTymSTBEbnq28ASAiXZbUDG9lI6YewtRzf7ZM u+Pq8IXF4+PKYt7c3Ut0gfY9tc3kuT7x+QnreHHvZ3i0Ckcj8TTBp9x7h6IVLmQA CocCgCe0zT7UVcQdO7Km7Ttoxe6e9oiecTdzAiMQBXWxmE7JIZsU0d6bbpHcp6IJ rxKXKBpSAUstPefpZDRTk7Gma3stT4QoVYl+Y/RGibo53imezlnIktXyyBgpztsO 279rAf6p8Jrm/Gl+whbYq6vG0y+152TsJvhquPrgsw18GdBrpC//ZycWgfHnyFW/ SUp+Jfq/y5ES9duLPUccfhmnhCYFAPNF/U2AAymfmVyEj8feHgjfGfkwVXd+/Fyl JrvMEC5+Vut5sSAnpnMcJmdtqwZo0HWbXCWgjA+dHbfAv8CcD1c= =F2JS -----END PGP SIGNATURE----- --QxWK0RwueBQHBM76LpgYvo0S8VsHqKLMc--