From owner-freebsd-fs@freebsd.org Sat May 23 21:41:15 2020 Return-Path: Delivered-To: freebsd-fs@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 23D3D2DED48 for ; Sat, 23 May 2020 21:41:15 +0000 (UTC) (envelope-from SRS0=4R+8=7F=quip.cz=000.fbsd@elsa.codelab.cz) Received: from elsa.codelab.cz (elsa.codelab.cz [94.124.105.4]) (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 49Txcp1778z3VGL for ; Sat, 23 May 2020 21:41:13 +0000 (UTC) (envelope-from SRS0=4R+8=7F=quip.cz=000.fbsd@elsa.codelab.cz) Received: from elsa.codelab.cz (localhost [127.0.0.1]) by elsa.codelab.cz (Postfix) with ESMTP id 7FF8428422; Sat, 23 May 2020 23:41:11 +0200 (CEST) Received: from illbsd.quip.test (ip-62-24-92-232.net.upcbroadband.cz [62.24.92.232]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by elsa.codelab.cz (Postfix) with ESMTPSA id 286102842E; Sat, 23 May 2020 23:41:10 +0200 (CEST) Subject: Re: ZFS on FreeBSD 11.3 slower than 10.4 To: Walter Cramer Cc: "freebsd-fs@freebsd.org" References: <1ff455a5-d111-86fa-ceb1-1021b6d9a5b6@quip.cz> <20200523155301.U91902@mulder.mintsol.com> From: Miroslav Lachman <000.fbsd@quip.cz> Message-ID: Date: Sat, 23 May 2020 23:41:08 +0200 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:68.0) Gecko/20100101 Thunderbird/68.6.0 MIME-Version: 1.0 In-Reply-To: <20200523155301.U91902@mulder.mintsol.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 49Txcp1778z3VGL X-Spamd-Bar: / Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=none (mx1.freebsd.org: domain of SRS0=4R@elsa.codelab.cz has no SPF policy when checking 94.124.105.4) smtp.mailfrom=SRS0=4R@elsa.codelab.cz X-Spamd-Result: default: False [-0.81 / 15.00]; TO_DN_EQ_ADDR_SOME(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; ARC_NA(0.00)[]; NEURAL_HAM_LONG(-0.84)[-0.842]; MIME_GOOD(-0.10)[text/plain]; RCVD_TLS_LAST(0.00)[]; DMARC_NA(0.00)[quip.cz]; AUTH_NA(1.00)[]; RCVD_COUNT_THREE(0.00)[3]; TO_MATCH_ENVRCPT_SOME(0.00)[]; NEURAL_HAM_SHORT(-0.55)[-0.553]; RCPT_COUNT_TWO(0.00)[2]; NEURAL_HAM_MEDIUM(-0.62)[-0.617]; R_SPF_NA(0.00)[no SPF record]; FORGED_SENDER(0.30)[000.fbsd@quip.cz,SRS0=4R@elsa.codelab.cz]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:42000, ipnet:94.124.104.0/21, country:CZ]; FROM_NEQ_ENVFROM(0.00)[000.fbsd@quip.cz,SRS0=4R@elsa.codelab.cz]; TAGGED_FROM(0.00)[8=7F=quip.cz=000.fbsd] X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 23 May 2020 21:41:15 -0000 On 2020-05-23 22:11, Walter Cramer wrote: > On Sat, 23 May 2020, Miroslav Lachman wrote: > >> I upgraded my old desktop computer few month ago from old 10.4 based >> PC-BSD to stock FreeBSD 11.3. It uses single 2TB HDD 7200rpm. >> My problem is that upgraded version is really slow and some desktop >> applications are very lagging (playing multimedia is interrupted for a >> fraction of seconds) when there is heavy filesystem activity. >> >> I am using zfsnap2 for taking snapshots periodically and when there is >> enough snapshots zfs destroy is called. In this time the user >> experience is terrible. Starting new application like browser or even >> something much smaller takes minutes. The old version based on FreeBSD >> 10.4 behaves much better. I used the old version for years and never >> have problems with interrupted multimedia playback. >> >> Are there some sysctls to tune to get better desktop interactivity in >> heavy filesystem operations like zfs destroy, pkg check or other >> "find" periodic scripts? >> >> Kind regards >> Miroslav Lachman > > Does `top` or `vmstat` show that Free Memory is quite low when you are > experiencing the problem?  We had ARC / Free Memory performance problems > with 11.X, and found that setting the sysctl "vfs.zfs.arc_max" much > lower was necessary. Free memory is not a problem. The machine in question has vfs.zfs.arc_max="1024M" (the same as in 10.4) Kind regards Miroslav Lachman