From owner-freebsd-current@freebsd.org Sun Feb 10 15:35:26 2019 Return-Path: Delivered-To: freebsd-current@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 4D9AB14D0008 for ; Sun, 10 Feb 2019 15:35:26 +0000 (UTC) (envelope-from zeising+freebsd@daemonic.se) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id A2921846A8 for ; Sun, 10 Feb 2019 15:35:25 +0000 (UTC) (envelope-from zeising+freebsd@daemonic.se) Received: by mailman.ysv.freebsd.org (Postfix) id 5DCDB14D0007; Sun, 10 Feb 2019 15:35:25 +0000 (UTC) Delivered-To: current@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 20A2014D0006 for ; Sun, 10 Feb 2019 15:35:25 +0000 (UTC) (envelope-from zeising+freebsd@daemonic.se) Received: from mail.daemonic.se (mail.daemonic.se [176.58.89.161]) (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 2B62C846A6 for ; Sun, 10 Feb 2019 15:35:23 +0000 (UTC) (envelope-from zeising+freebsd@daemonic.se) Received: from cid.daemonic.se (localhost [IPv6:::1]) by mail.daemonic.se (Postfix) with ESMTP id 43yCfW6PX2zDjTF; Sun, 10 Feb 2019 15:35:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=daemonic.se; h= content-transfer-encoding:content-language:content-type :content-type:in-reply-to:mime-version:user-agent:date:date :message-id:from:from:references:subject:subject:received :received; s=20151023; t=1549812915; bh=QD7EHAMmd7Gy9u+KEvciOQq7 UeUHhFEyysHoOILL6XE=; b=I47hprYWxyo1WNEBq9YCezANzwxeBHAWa2uyUMgP 7IBcWSJjicdSz7a03qhYLkWGbUEEHs9S6YA8qie9jy7T32hlBCrUq+Pz9rXAnlUo M63iDwort8fDksHY/C8pJIONaYQ7I0HaSEIjX+n1c7aztrfVfIXVRZNNnAKkObaL Ajc= X-Virus-Scanned: amavisd-new at daemonic.se Received: from mail.daemonic.se ([127.0.0.1]) (using TLS with cipher ECDHE-RSA-AES128-GCM-SHA256) by cid.daemonic.se (mailscanner.daemonic.se [127.0.0.1]) (amavisd-new, port 10587) with ESMTPS id zv8Hnk10f1GU; Sun, 10 Feb 2019 15:35:15 +0000 (UTC) Received: from [IPv6:2001:470:dca9:2:f577:da68:d7aa:723f] (unknown [IPv6:2001:470:dca9:2:f577:da68:d7aa:723f]) by mail.daemonic.se (Postfix) with ESMTPSA id 43yCfW0lf8zDjCL; Sun, 10 Feb 2019 15:35:14 +0000 (UTC) Subject: Re: "Oddness" in head since around r343678 or so To: Alexander Leidinger , "Rodney W. Grimes" , current@freebsd.org References: <201902071536.x17FaPtI051105@pdx.rh.CN85.dnsmgr.net> <168cc6f6518.27fa.fa4b1493b064008fe79f0f905b8e5741@Leidinger.net> From: Niclas Zeising Message-ID: Date: Sun, 10 Feb 2019 16:35:06 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.5.0 MIME-Version: 1.0 In-Reply-To: <168cc6f6518.27fa.fa4b1493b064008fe79f0f905b8e5741@Leidinger.net> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 2B62C846A6 X-Spamd-Bar: ------- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=daemonic.se header.s=20151023 header.b=I47hprYW; dmarc=pass (policy=none) header.from=daemonic.se; spf=pass (mx1.freebsd.org: domain of zeising@daemonic.se designates 176.58.89.161 as permitted sender) smtp.mailfrom=zeising@daemonic.se X-Spamd-Result: default: False [-7.67 / 15.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; R_DKIM_ALLOW(-0.20)[daemonic.se:s=20151023]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; R_SPF_ALLOW(-0.20)[+mx]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.10)[text/plain]; IP_SCORE(-3.76)[ip: (-9.87), ipnet: 176.58.89.0/24(-4.94), asn: 36236(-3.91), country: US(-0.07)]; TO_DN_SOME(0.00)[]; RCVD_COUNT_THREE(0.00)[4]; TO_MATCH_ENVRCPT_SOME(0.00)[]; DKIM_TRACE(0.00)[daemonic.se:+]; MX_GOOD(-0.01)[mail.daemonic.se]; DMARC_POLICY_ALLOW(-0.50)[daemonic.se,none]; NEURAL_HAM_SHORT(-0.90)[-0.903,0]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_LAST(0.00)[]; ASN(0.00)[asn:36236, ipnet:176.58.89.0/24, country:US]; TAGGED_FROM(0.00)[freebsd]; MID_RHS_MATCH_FROM(0.00)[] X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.29 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: Sun, 10 Feb 2019 15:35:26 -0000 On 2019-02-08 10:27, Alexander Leidinger wrote: > Hi, > > I recently noticed some generic slowness myself. I experienced this > during replacing disks in a raidz by bigger ones. Long story short, > check top -s if you have vnlru running for a long period at high CPU... > If yes increase kern.maxvnodes (I increased to 10 times). Note, we > should improve the admin page in the FAQ, the vnlru entry could need a > little bit more hints and explanations. > > If you encounter the same issue we have probably introduced a change > somewhere with an unintended side effect. > > Bye, > Alexander. > Hi! I'm seeing this as well, on 13-CURRENT. I updated a computer from the last January snapshot (30 or 31 of January, I can't remember) and it seems disk IO is very slow. I remember having a svn checkout taking a very long time, with the SVN process pegged at 100% according to top. I can't see the vnlru process running though, but I haven't looked closely, and I haven't tried the maxvnodes workaround. Something has changed though. This is systems using ZFS, both mirror and single disk. Gstat shows disks are mostly idle. I know this is a lousy bug report, but this, and the feeling that things are slower than usual, is what I have for now. Regards --