From owner-freebsd-hackers@freebsd.org Sun Nov 18 13:23:47 2018 Return-Path: Delivered-To: freebsd-hackers@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 4E82E1101F22 for ; Sun, 18 Nov 2018 13:23:47 +0000 (UTC) (envelope-from george+freebsd@m5p.com) Received: from mailhost.m5p.com (mailhost.m5p.com [74.104.188.4]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "m5p.com", Issuer "Let's Encrypt Authority X3" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 785B97DA30 for ; Sun, 18 Nov 2018 13:23:41 +0000 (UTC) (envelope-from george+freebsd@m5p.com) Received: from [10.100.0.31] (haymarket.m5p.com [10.100.0.31]) (authenticated bits=0) by mailhost.m5p.com (8.15.2/8.15.2) with ESMTPSA id wAID07Le001653 (version=TLSv1.2 cipher=AES128-SHA bits=128 verify=NO) for ; Sun, 18 Nov 2018 08:00:21 -0500 (EST) (envelope-from george+freebsd@m5p.com) Subject: Re: 13-CURRENT: several GB swap being used despite plenty of free RAM To: freebsd-hackers@freebsd.org References: <201811180154.wAI1smhg049214@slippy.cwsent.com> From: George Mitchell Openpgp: preference=signencrypt Autocrypt: addr=george+freebsd@m5p.com; 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FreeBSD amd64; rv:60.0) Gecko/20100101 Thunderbird/60.3.0 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="XVc9df5vdVSPHE3rcRFs2LyhdBuvqkizr" X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.6.2 (mailhost.m5p.com [10.100.0.247]); Sun, 18 Nov 2018 08:00:23 -0500 (EST) X-Rspamd-Queue-Id: 785B97DA30 X-Spamd-Result: default: False [-3.03 / 15.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; RCVD_TLS_ALL(0.00)[]; FROM_HAS_DN(0.00)[]; R_SPF_ALLOW(-0.20)[+a]; TO_MATCH_ENVRCPT_ALL(0.00)[]; HAS_ATTACHMENT(0.00)[]; MIME_GOOD(-0.20)[multipart/signed,multipart/mixed,text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-hackers@freebsd.org]; RCPT_COUNT_ONE(0.00)[1]; TO_DN_NONE(0.00)[]; MX_GOOD(-0.01)[mailhost.m5p.com]; NEURAL_HAM_SHORT(-0.45)[-0.450,0]; DMARC_NA(0.00)[m5p.com]; SIGNED_PGP(-2.00)[]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; IP_SCORE(-0.17)[asn: 701(-0.77), country: US(-0.09)]; ASN(0.00)[asn:701, ipnet:74.104.0.0/16, country:US]; TAGGED_FROM(0.00)[freebsd]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_COUNT_TWO(0.00)[2] X-Rspamd-Server: mx1.freebsd.org X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 18 Nov 2018 13:23:47 -0000 This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --XVc9df5vdVSPHE3rcRFs2LyhdBuvqkizr Content-Type: multipart/mixed; boundary="rJOsc9QsAnfUOkqf21F8wVTeJwhF6WhiX"; protected-headers="v1" From: George Mitchell To: freebsd-hackers@freebsd.org Message-ID: <0fd769af-9a7d-95cf-7cba-5e41e3bc3c30@m5p.com> Subject: Re: 13-CURRENT: several GB swap being used despite plenty of free RAM References: <201811180154.wAI1smhg049214@slippy.cwsent.com> In-Reply-To: --rJOsc9QsAnfUOkqf21F8wVTeJwhF6WhiX Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 11/18/18 7:11 AM, Stefan Blachmann wrote: > The inconveniences that the new swapping strategy causes are a regular > topic in the FreeBSD forums. >=20 > Desktop users complain about lagginess, server users complain of long > delays because server processes intended to be kept in memory for > quick response times got swapped out and need to be swapped in again, > resulting in outrageously poor server performance in spite of plenty > of unused memory. [...] Before necessarily blaming swapping, have you tried substituting SCHED_4BSD for SCHED_ULE in the kernel? SCHED_ULE is not the world champion scheduler for interactive tasks. (I'm ducking back into my rabbit hole now and no one needs to throw any more brickbats at me. Sorry for the digression.) -- George --rJOsc9QsAnfUOkqf21F8wVTeJwhF6WhiX-- --XVc9df5vdVSPHE3rcRFs2LyhdBuvqkizr Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEENdM4ZHktsJW5kKZXwRES3m+p4fkFAlvxYwQACgkQwRES3m+p 4fmjRBAAihC7l1I+In9fPAphzcafqWDN6pm2ota5pSP96qs+zZqXBFZJSD6SOOYS 436n0ie2aYWEBhO199gqHTm+w//eQgyM+AuAH/RSonC/PlUf/TNLDYhxJJXdroWd UIapoR/PkYuMScGrqVv5Kqp2TyQa2eUJIFz9PDFlo28yiIczyU0D4uq+vUP0QgHu kuAJGIFWVMDHH7Lsh0IuuyPNGSYpmopaduQJY7TUVxmhfEcdrLf3sgnbjpnP0hpa bXk/d0SwlKG0KqDvyKhNdE17UT/eEUuUTvs/1A1ib2s98vyUV9hxwfdau0Az2E2+ Zx28yu3UdM7R5DhYF5dHmIu8Spl7LYiw7/XN0mm+6zHiScBrZoHa84w0s5MVg47d +dVpag0eGoXO9aeroR14ioQP1jCY/HyB9CBMAfxKDvUdHV7JvjXR/8MU6IjcM9U3 tqatLylitR+0foMApgV3hXhMgQV5to5GJI5K/mqzrZUKlmyGXTH3s7NFxRO3/K6q /+p5o4/aV9cMee+WWDXjnyLbGeFj2uIKS1/M6w304vDWwk+G/uPurYgBkmkngF+h HEgVK/J/Tk7cC++Ert4TX+mvSwOwIa4Mz64djWNVzUMQrpz0rED/VM0kxn0r5TkT QP97ZMr2C+rgvaWgIXxM7aVRBaLAvzCWMGKt4JuEPuvIvxQQv0Q= =/ywx -----END PGP SIGNATURE----- --XVc9df5vdVSPHE3rcRFs2LyhdBuvqkizr--