From owner-freebsd-questions@freebsd.org Fri Jul 13 19:22:44 2018 Return-Path: Delivered-To: freebsd-questions@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 C948D10496E1 for ; Fri, 13 Jul 2018 19:22:43 +0000 (UTC) (envelope-from mike@sentex.net) Received: from smarthost2.sentex.ca (smarthost2.sentex.ca [IPv6:2607:f3e0:80:80::2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "smarthost2.sentex.ca", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id CC85D748B2 for ; Fri, 13 Jul 2018 19:22:42 +0000 (UTC) (envelope-from mike@sentex.net) Received: from lava.sentex.ca (lava.sentex.ca [IPv6:2607:f3e0:0:5:0:0:0:11]) by smarthost2.sentex.ca (8.15.2/8.15.2) with ESMTPS id w6DJMfqs046320 (version=TLSv1 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Fri, 13 Jul 2018 15:22:42 -0400 (EDT) (envelope-from mike@sentex.net) Received: from [192.168.43.26] (saphire3.sentex.net [192.168.43.26]) by lava.sentex.ca (8.15.2/8.15.2) with ESMTP id w6DJMdJo098634; Fri, 13 Jul 2018 15:22:39 -0400 (EDT) (envelope-from mike@sentex.net) Subject: Re: Disk/ZFS activity crash on 11.2-STABLE [SOLVED] To: Jim Long Cc: freebsd-questions@freebsd.org References: <20180711212959.GA81029@g5.umpquanet.com> <5ebd8573-1363-06c7-cbb2-8298b0894319@sentex.net> <20180712183512.GA75020@g5.umpquanet.com> <20180712214248.GA98578@g5.umpquanet.com> <20180713191050.GA98371@g5.umpquanet.com> From: Mike Tancsa Openpgp: preference=signencrypt Autocrypt: addr=mike@sentex.net; prefer-encrypt=mutual; keydata= xsBNBEzcA24BCACpwI/iqOrs0GfQSfhA1v6Z8AcXVeGsRyKEKUpxoOYxXWc2z3vndbYlIP6E YJeifzKhS/9E+VjhhICaepLHfw865TDTUPr5D0Ed+edSsKjlnDtb6hfNJC00P7eoiuvi85TW F/gAxRY269A5d856bYrzLbkWp2lKUR3Bg6NnORtflGzx9ZWAltZbjYjjRqegPv0EQNYcHqWo eRpXilEo1ahT6nmOU8V7yEvT2j4wlLcQ6qg7w+N/vcBvyd/weiwHU+vTQ9mT61x5/wUrQhdw 2gJHeQXeDGMJV49RT2EEz+QVxaf477eyWsdQzPVjAKRMT3BVdK8WvpYAEfBAbXmkboOxABEB AAHNHG1pa2UgdGFuY3NhIDxtaWtlQHNlbnRleC5jYT7CwHgEEwECACIFAkzcA24CGwMGCwkI BwMCBhUIAgkKCwQWAgMBAh4BAheAAAoJEJXHwM2kc8rX+sMH/2V6pTBKsQ5mpWWLgs6wVP2k BC+6r/YKNXv9Rw/PrC6+9hTbgA+sSjJ+8gxsCbJsOQXZrxF0x3l9oYdYfuKcwdwXFX1/FS8p HfBeDkmlH+dI709xT9wgrR4dS5aMmKp0scPrXPIAKiYVOHjOlNItcLYTEEWEFBepheEVsgmk GrNbcrHwOx/u4igUQ8vcpyXPyUki+BsftPw8ZQvBU887igh0OxaCR8AurJppQ5UQd63r81cX E1ZjoFoWCaGK/SjPb/OhpYpu5swoZIhOxQbn7OtakYPsDd5t2A5KhvjI8BMTnd5Go+2xsCmr jlIEq8Bi29gCcfQUvNiClevi13ifmnnOwE0ETNwDbgEIALWGNJHRAhpd0A4vtd3G0oRqMBcM FGThQr3qORmEBTPPEomTdBaHcn+Xl+3YUvTBD/67/mutWBwgp2R5gQOSqcM7axvgMSHbKqBL 9sd1LsLw0UT2O5AYxv3EwzhG84pwRg3XcUqvWA4lA8tIj/1q4Jzi5qOkg1zxq4W9qr9oiYK5 bBR638JUvr3eHMaz/Nz+sDVFgwHmXZj3M6aE5Ce9reCGbvrae7H5D5PPvtT3r22X8SqfVAiO TFKedCf/6jbSOedPN931FJQYopj9P6b3m0nI3ZiCDVSqeyOAIBLzm+RBUIU3brzoxDhYR8pz CJc2sK8l6YjqivPakrD86bFDff8AEQEAAcLAXwQYAQIACQUCTNwDbgIbDAAKCRCVx8DNpHPK 1+iQB/99aqNtez9ZTBWELj269La8ntuRx6gCpzfPXfn6SDIfTItDxTh1hrdRVP5QNGGF5wus N4EMwXouskva1hbFX3Pv72csYSxxEJXjW16oV8WK4KjKXoskLg2RyRP4uXqL7Mp2ezNtVY5F 9nu3fj4ydpHCSaqKy5xd70A8D50PfZsFgkrsa5gdQhPiGGEdxhq/XSeAAnZ4uVLJKarH+mj5 MEhgZPEBWkGrbDZpezl9qbFcUem/uT9x8FYT/JIztMVh9qDcdP5tzANW5J7nvgXjska+VFGY ryZK4SPDczh74mn6GI/+RBi7OUzXXPgpPBrhS5FByjwCqjjsSpTjTds+NGIY Organization: Sentex Communications Message-ID: Date: Fri, 13 Jul 2018 15:22:39 -0400 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <20180713191050.GA98371@g5.umpquanet.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.83 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 13 Jul 2018 19:22:44 -0000 On 7/13/2018 3:10 PM, Jim Long wrote: > > It appears that limiting the ARC size did it. The 'zfs send -R' was > able to complete with ARC limited to 50G, and a second run with a 60G > ARC limit also completed. Great! I am glad that helped. Its helpful to me too as I have some systems I am upgrading to RELENG_11 from RELENG_10 soon. I was aware of this particular issue, but was worried perhaps your crashes were related to something else I might run into :) If you ever have a system with a LOT of small files and directories, a handy value to tune / keep an eye on is the mix allocated to metadata vs file data. vfs.zfs.arc_meta_limit. You can tell when doing things like "ls" in a directory takes a LONG time to list files. In my case, I had many directories with 50,000+ files. Also things like 'zfs list -t snapshot' start to take a long time. ---Mike -- ------------------- Mike Tancsa, tel +1 519 651 3400 x203 Sentex Communications, mike@sentex.net Providing Internet services since 1994 www.sentex.net Cambridge, Ontario Canada