From owner-freebsd-fs@freebsd.org Tue Jun 20 17:29:49 2017 Return-Path: Delivered-To: freebsd-fs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id C05DAD9D967 for ; Tue, 20 Jun 2017 17:29:49 +0000 (UTC) (envelope-from Aaron.Caza@ca.weatherford.com) Received: from NAM01-BN3-obe.outbound.protection.outlook.com (mail-bn3nam01on0043.outbound.protection.outlook.com [104.47.33.43]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (Client CN "mail.protection.outlook.com", Issuer "Microsoft IT SSL SHA2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 3619F67722 for ; Tue, 20 Jun 2017 17:29:48 +0000 (UTC) (envelope-from Aaron.Caza@ca.weatherford.com) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=weatherford.onmicrosoft.com; s=selector1-ca-weatherford-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version; bh=idzRNoQReN2sA2GI37518VdEw4SRBwa1raXgKosCFD4=; b=Yv4/BcEWs5XMFLzfO5fzoQWD8xUsRm6pF57jNDxQAI/CZ8wYq6bRhrebY1r0uPRq5K2rlCVJW4ll8AksvaEUj4y9niltfA0Rs9edOE743wzYy9kUSSF1D35inTT5MpVNscZLk5qXGV9Zx1iofPTnQ1/NcvhePUKtTQPShz83xmE= Received: from BN3PR03CA0111.namprd03.prod.outlook.com (10.174.66.29) by DM5PR03MB3164.namprd03.prod.outlook.com (10.174.190.37) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1178.14; Tue, 20 Jun 2017 17:29:47 +0000 Received: from BN1BFFO11OLC002.protection.gbl (2a01:111:f400:7c10::1:162) by BN3PR03CA0111.outlook.office365.com (2603:10b6:400:4::29) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1178.14 via Frontend Transport; Tue, 20 Jun 2017 17:29:47 +0000 Authentication-Results: spf=pass (sender IP is 23.103.226.20) smtp.mailfrom=ca.weatherford.com; freebsd.org; dkim=none (message not signed) header.d=none;freebsd.org; dmarc=bestguesspass action=none header.from=ca.weatherford.com; Received-SPF: Pass (protection.outlook.com: domain of ca.weatherford.com designates 23.103.226.20 as permitted sender) receiver=protection.outlook.com; client-ip=23.103.226.20; helo=032-smtp-out.weatherford.com; Received: from 032-smtp-out.weatherford.com (23.103.226.20) by BN1BFFO11OLC002.mail.protection.outlook.com (10.58.145.13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1178.14 via Frontend Transport; Tue, 20 Jun 2017 17:29:45 +0000 Received: from DM2PR58MB013.032d.mgd.msft.net (141.251.110.81) by DM2PR58MB016.032d.mgd.msft.net (141.251.110.84) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1178.14; Tue, 20 Jun 2017 17:29:44 +0000 Received: from DM2PR58MB013.032d.mgd.msft.net ([141.251.110.81]) by DM2PR58MB013.032d.mgd.msft.net ([141.251.110.81]) with mapi id 15.01.1178.018; Tue, 20 Jun 2017 17:29:44 +0000 From: "Caza, Aaron" To: "freebsd-fs@freebsd.org" , Karl Denninger Subject: RE: FreeBSD 11.1 Beta 2 ZFS performance degradation on SSDs Thread-Topic: RE: FreeBSD 11.1 Beta 2 ZFS performance degradation on SSDs Thread-Index: AdLp6XXjvHQ23GL/ReyOIakk8di/hw== Date: Tue, 20 Jun 2017 17:29:44 +0000 Message-ID: <2d8a525e5355406aa7b8bf6690101008@DM2PR58MB013.032d.mgd.msft.net> Accept-Language: en-CA, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [141.251.205.196] x-ms-publictraffictype: Email X-MS-TrafficTypeDiagnostic: DM2PR58MB016:|DM5PR03MB3164: X-MS-Office365-Filtering-Correlation-Id: 46495f4a-6261-404c-7591-08d4b801f24d Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OrganizationHeadersPreserved: DM2PR58MB016.032d.mgd.msft.net X-EOPAttributedMessage: 0 X-MS-Office365-Filtering-HT: Tenant X-Forefront-Antispam-Report: CIP:23.103.226.20; IPV:NLI; CTRY:; EFV:NLI; SFV:NSPM; SFS:(10009020)(6009001)(39410400002)(39400400002)(39850400002)(39860400002)(39450400003)(39840400002)(2980300002)(438002)(24454002)(199003)(42174003)(13464003)(51914003)(189002)(377454003)(9170700003)(478600001)(46406003)(24736003)(22756006)(305945005)(5660300001)(50466002)(66066001)(47776003)(189998001)(86146001)(72206003)(86362001)(50986999)(53546009)(5890100001)(2501003)(54356999)(97756001)(6116002)(38730400002)(3846002)(102836003)(6246003)(7736002)(7696004)(53936002)(23726003)(2906002)(106466001)(42882006)(356003)(33646002)(6306002)(108616004)(229853002)(2900100001)(55016002)(9686003)(8936002)(8676002)(8746002)(81166006); DIR:OUT; SFP:1101; SCL:1; SRVR:DM5PR03MB3164; H:032-smtp-out.weatherford.com; FPR:; SPF:Pass; MLV:sfv; A:0; MX:1; LANG:en; X-Microsoft-Exchange-Diagnostics: 1; BN1BFFO11OLC002; 1: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 X-CrossPremisesHeadersPromoted: BN1BFFO11OLC002.protection.gbl X-CrossPremisesHeadersFiltered: BN1BFFO11OLC002.protection.gbl X-Microsoft-Antispam: UriScan:; BCL:0; PCL:0; RULEID:(22001)(8251501002)(2017030254075)(201703131423075)(201703031133081)(201702281549075); SRVR:DM5PR03MB3164; X-Microsoft-Exchange-Diagnostics: 1; DM5PR03MB3164; 3: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 X-Microsoft-Exchange-Diagnostics: 1; DM5PR03MB3164; 25: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 X-Microsoft-Exchange-Diagnostics: 1; DM5PR03MB3164; 31: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 X-Microsoft-Exchange-Diagnostics: 1; DM5PR03MB3164; 20:3n1mFrGz0uVG2icHC31QU5heJPjZQOfIDLVxr3Kq5hVHyuw48t1MF+TxWxcWFZVFCkG+DMiGWR7CsIvi2S89nJ61Ey8cplHUvFtWtFu9Zb7crK4fsko8SVb2H8YmZAtlQKgdFTX0ojpngSE67svgIsFBShTZktbfjemvA8Tt7BAdNpPyNyzX84xFt5l7E0IozeZo55MskUfZsJFJ2w26GOIH1XKRtXvKNWdkP2NpnF32mU7s3tpQxVeK7OB7dGoTj8vpc3NcipFDGtLyq44focjtY+kgUKhvp4AcwK5cz3C7vELG+V4DdLynL+bwCKgYBHStsIFSMybDahh2gttgy90WFrAlrsLUkilSP0KIPVVsFdb/PF+m7jbVvNsHFUfEJCBFW9oTBqlWIiRY61OZEIssd9hr3cIvbZcSdpDkHtMqxWy56+xkicSggLOg69L4t8AvLesNrhrxULXF9jt/n9FBydCTtk2kFSxtv2JweAWWlyHAYmHBPHN6vlf0+wY3 X-Microsoft-Antispam-PRVS: X-Exchange-Antispam-Report-Test: UriScan:(192374486261705); X-Exchange-Antispam-Report-CFA-Test: BCL:0; PCL:0; RULEID:(100000700101)(100105000095)(100000701101)(100105300095)(100000702101)(100105100095)(11241501159)(6040450)(601004)(2401047)(13016025)(5005006)(8121501046)(13018025)(93006095)(93004095)(3002001)(10201501046)(100000703101)(100105400095)(6055026)(6041248)(20161123555025)(201703131423075)(201702281528075)(201703061421075)(201703061406153)(20161123558100)(20161123562025)(20161123560025)(20161123564025)(6072148)(100000704101)(100105200095)(100000705101)(100105500095); SRVR:DM5PR03MB3164; BCL:0; PCL:0; RULEID:(100000800101)(100110000095)(100000801101)(100110300095)(100000802101)(100110100095)(100000803101)(100110400095)(100000804101)(100110200095)(100000805101)(100110500095); SRVR:DM5PR03MB3164; X-Microsoft-Exchange-Diagnostics: =?us-ascii?Q?1; DM5PR03MB3164; 4:ph8xr4Lg/jyKRDgoABEJFvSqG6Z5qrjWx6IgvtCxH7?= =?us-ascii?Q?Xm1o1sm5/royIVgILYi/s+UFepKBdJbOm6o/NOupsZDY3UCLpa+vb2JVMAf0?= =?us-ascii?Q?aEWosOIWfxqmxmha4AGIqYtT0DSZCHJDF2/qB4mheqItHFZisWkiH7RGVQbG?= =?us-ascii?Q?jJ3zVqz6+FU5rGleokw3739+djo+Hp88wxQBimJn9A8n+V7q5yNiJZ7Z7N4+?= =?us-ascii?Q?Oen6STHHCpOKal7K8JlJndStgzmKE+0eV6MThuVe8gQLxzInY1VyjQy0CRBn?= =?us-ascii?Q?qIfKnZvRwupyezM821q34lknuKrYaE6JQ38sBqUyVLZuAkC9ckT2oXJiW9fz?= =?us-ascii?Q?rzwHpDkHobBpM3WWUk4VByOYHMoaZ2teglwOaPK7zZ0RhoFixlvlyAGMa/An?= =?us-ascii?Q?4++BfhiYT04T1LFBBURDJVQsz0D5Ok0AJyfD4TWGCZBA5FtVB8sBS1IwF+F9?= =?us-ascii?Q?lbmlBVrpzcG27tXe/KQN8/qu3PqKBeNWJYVsx13peH94Ki/cs6qaZ4AkcK3+?= =?us-ascii?Q?j7jiQ+Ln1Tm9lfJBxiFrpHcVVTxqOYiaBDj75klmUZBO2s1k1s1C9JMMAIP3?= =?us-ascii?Q?Kk6CGfjHZgzXlMD32K24QIyYyehIEw/N+4JGzTu1p99xQRp2yaT9enYqB9KF?= =?us-ascii?Q?bfHS6k2mCIKl1rtx8ECDKceS3qSWB9f1olYYGfmJQX2rkvizoJvgk8hL8Rvv?= =?us-ascii?Q?Q4ccvNi8VA7l7XTSSASGp6EFmbRBidvtB8R3zBaD4QvAmRnw+9uk7KuMWcbX?= =?us-ascii?Q?KpRsQbO9FbEPA2pDHlbad03OL2/WKrkCxQhV5waI+leAAR9QMoXNKjdloR7o?= =?us-ascii?Q?/b79ltk07QkRa2IpZOk+GUZk9NnZadz2PgdlwJ7m9dD9um9rUD49trzex1WT?= =?us-ascii?Q?r9KMuajkP4hM6n01SBSsXuXf6gkUIAhceFpgOyPsmp5elmVesX+hcWEaHlcX?= =?us-ascii?Q?gGzMT+heLINcii3rkn4sqvs0ElvJ4IwsyyNHskMpBGYwYAvM4PBvAONZS2kV?= =?us-ascii?Q?Mua2dN/Lw+F3d8jA+ABrolviXvaExQR5LKnc/L8GdAk6hwM2a6LQXc7r4fQP?= =?us-ascii?Q?gU7o4TSS4s9jhXgPH7JWIiuYxSMI5mz4eGxnbRhFmIx3E2UK1GMJ32viXXh6?= =?us-ascii?Q?t6xdF0SlTP0NOImemgTDa4+6WH0HNm3/Oj/4V7RrZM4WrmVg9qcFLTFKWopq?= =?us-ascii?Q?p8Ht7DTXlXOkEv/T3Z0wdfia+aFWWInbZKsJgW6FD/gkUzQN1bJPIYqqmZTu?= =?us-ascii?Q?Cdaw20XxYE20DT7H+qOwi5fL5H5y5MfjoOwpnu?= X-Forefront-PRVS: 03449D5DD1 X-Microsoft-Exchange-Diagnostics: =?us-ascii?Q?1; DM5PR03MB3164; 23:WGMQJRmg2QT7PP0TO99dAGbweW63ugCsBW6W+hsVG?= =?us-ascii?Q?oi/tqT0vVEFc3HVYxuLEuCG8Efu60doPwTCDHMkp7ZLZE3VhTz+fcYhmIQKK?= =?us-ascii?Q?lMqDHlz/556Z+PiV76dR7/IQEAaEwfTKnHRY9i6JEGWzGu7qLIzs6u7+GPLL?= =?us-ascii?Q?v2ERnItMHh16YSae2cYElHMlROQ4HfB3lLQT7dn1qkSsKBMeBxqXZBBhHZFr?= =?us-ascii?Q?OTd9IAC6Dtg2w8apeijM1iHn7YzFJFMnMtbxAzOo5j5GolfWAHrnwQMwmNb/?= =?us-ascii?Q?L9SkswMaaAoRaoVVvT6iccn1KqelOq7QmamvH2EGry6T/zQQ/yzwqi60oTd4?= =?us-ascii?Q?MeVkPNffmF9ij3zclbswYhNR63U+WwWTw4GovfcR5pqLsTTVxOc8S7OLMWY2?= =?us-ascii?Q?UFWynQ8U4LG6rX93ROBbtRc+f0aGQB84PYgEv4zOp8z/GmUVtwJd+4KnVPHF?= =?us-ascii?Q?t9LNcwAAWRpJ7xY/F35PIAVlNkNs0oTVrxxtjUuJYLXY6CiVgFSPUFptUYAU?= =?us-ascii?Q?CXB7jz8E6AfiDlDu4UoolePA8958r8a9KETfzcLGCjMSEbjz+K6A31Dw65hn?= =?us-ascii?Q?hAGa3rtaLxq74V+17Ryop8mumaMQD/ukJ9294FMlZAcThGrR/zRi3/BNnXWI?= =?us-ascii?Q?HTlFH/YVZcPkhgr5XZ911OKDlmkltIMqErdKEyVR7PmduTFLu1oouP1ihhl8?= =?us-ascii?Q?Nz7Ya8SO3bkJzv4mmLprxNuvMlW+cbthfX5dawQHuQHkBF0pzYBM1dPbiDcf?= =?us-ascii?Q?jMdOoP9M38L4TPWuMQ+HpwQV+3WeUHxYHh/QBC/H38MDwUhnwn6/bPsia2Wk?= =?us-ascii?Q?QzyB+/UIrZ1+eUuWbRMbZXEyAU8NLStRHm5VX63zbXq0e2Qe+1uC96iaLXYZ?= =?us-ascii?Q?vN1thPkJnZplVt1ZeTabnc40SRpnqBGG11Pp8rt3uw5RCjLpKllTgZ7p4NJw?= =?us-ascii?Q?lpOvFOAVW7ciBNwceNNMxbMfVmj2aGXFr6/xJIDu2evo7Huv3xKs5C78IaSy?= =?us-ascii?Q?O56FwjKaQLz/GflTuU4EZgHJGzi7b1rBJN710tByxnXLsGQ0ldSiEEgf9VFe?= =?us-ascii?Q?i1msyihrRIkBxUJg55qj3psMV463xoCE3ZTpHxEQeFPhVCiM6s5Gh3Yph2VX?= =?us-ascii?Q?Pp63BvknZQydDRKP/EqTdUO/eE0iWLKRsxIElmrh8SojYaUS/RZbnGToXTIa?= =?us-ascii?Q?K6fjKNHNb0PXZcE3kJxV07ksMSXjtSq3d1dxx91N/RPxIZ6jcpL0ejkrQe14?= =?us-ascii?Q?wwK2xkU3wCXoNDmtksaZO0a4fhB3VGo2V/pa0w0lu8NtwmVIqoWxCuP5rimR?= =?us-ascii?Q?S9d5Wn9KOELdDxIrH2Fj3MWruiYk28ptfJBBzYUEgIJKSZgtrP7qqeERUpqg?= =?us-ascii?Q?V1TEtMQPkRJqC4daO+i7ReLsJBjVA6QbXYlhF5wDVhD+SzYMxdfm9q/EoI3u?= =?us-ascii?Q?/+XhPBJjQxEctQQfrphwxGw7EQIRbo=3D?= X-Microsoft-Exchange-Diagnostics: =?us-ascii?Q?1; DM5PR03MB3164; 6:+n0t02Z3W/gMUMzPzjOzmuswAB1k0b10jmmppdLZKN?= =?us-ascii?Q?ZioAY/pSTG2MqaMEofBkY1kSE07H65QH/fNmi/8mMXgbuGLu56gAz0Qc3hb1?= =?us-ascii?Q?vhk1P37QY6GpeNB9wAEEZPbgaNONAObGL+UmZYnA+ynK6tPhpztNBMK8rwPD?= =?us-ascii?Q?1ITJAx1gbS1JzoXzPKaGVZT/dsUTRAtdCijlI+pAzHCgGIzpN5ktyuMeMtyT?= =?us-ascii?Q?XFvP/nnWKLSS64hYfRO2JrRuDqGPBQrqkX3pxcJd/+BxETM3EVP2++YmMp4t?= =?us-ascii?Q?NtIwu9cTsADvdEE97NlnJc5ZK0qpPdP4NV2hOUovs2SMA2EeyWgC5HgG60ez?= =?us-ascii?Q?jwybFU+GV0t7Ud25JmUd0hHQtcc4+o5qojpnxydkRyXZrxwc8rFkrZjKKEqq?= =?us-ascii?Q?U5Uk9hupPMKTBEme8DDI207sw7yyNovQQQSnO3Bmi/bVKMeRM+n2Wja+NcIv?= =?us-ascii?Q?XuFfTzM9gfp9fwOL6TrN1dGZqC/v67nWjS7B9nCgBDNopaDzd5iBrTSfLnrZ?= =?us-ascii?Q?c/SPkIdFB8L3/D0mwCcidD0q6X7nvk/J4RB/2u2vpUdMa/LnHBBicauR9ZGA?= =?us-ascii?Q?TY0qfVHEBBGz9rdJmnM5Psq4sZ7hrUT8eTZbTtFgO0J6CHmGhvmb/D+JIyJo?= =?us-ascii?Q?rt0o5EzXrxGzt25ZSvQpyjAJ2wamV9ZFJkQuIFBhAKVoesDdNRyLkMBfG7mc?= =?us-ascii?Q?tyzhomq/dKp6pjp109RrhEnwRKf8Tj1rOdjicsj4L+8UgCT8dYJ8KHY0da0H?= =?us-ascii?Q?EzTwoXI+Fz+rTqZnqtPHY2TNLZIV8fLtw3iCCh7V01mQd1M8z6STqkpYdwS7?= =?us-ascii?Q?lnF9+p3PpjWSZOYAwBTpkoj+cHQXReSZ3SMUwEJ4t8TlTOR6dzJSNuxD/Vle?= =?us-ascii?Q?/fpIIto9ZDJd2UzotYSt1BSpbTiwbrHHwOuiBBFi4B5If20ypJIOfJrT23sM?= =?us-ascii?Q?4NCkQgYdi/87/GMIerostEoJkCpeYq6c30gIiIROKY0wPn/i0g9Z2FoCfcMO?= =?us-ascii?Q?ol2TFSVu8CFT7kCDRgRNUz?= X-Microsoft-Exchange-Diagnostics: 1; DM5PR03MB3164; 5: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; 24:OwGmXMWzzlknePLBUBOMbND3NISDnlAvNwWY1gas1yO/dhZCIEWw/VFQAnw5OEmGA9/xb+CI4gT3tec4LYgO6mcBK4/wAcVj95mJrr/DFAs= SpamDiagnosticOutput: 1:99 SpamDiagnosticMetadata: NSPM X-Microsoft-Exchange-Diagnostics: 1; DM5PR03MB3164; 7: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 X-OriginatorOrg: ca.weatherford.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Jun 2017 17:29:45.8235 (UTC) X-MS-Exchange-CrossTenant-Id: dd63fb60-07f6-4d96-8d40-ebeca61a524e X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=dd63fb60-07f6-4d96-8d40-ebeca61a524e; Ip=[23.103.226.20]; Helo=[032-smtp-out.weatherford.com] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR03MB3164 X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 20 Jun 2017 17:29:49 -0000 > -----Original Message----- > From: Karl Denninger [mailto:karl@denninger.net] > Sent: Monday, June 19, 2017 7:28 PM > To: freebsd-fs@freebsd.org > Subject: Re: FreeBSD 11.1 Beta 2 ZFS performance degradation on SSDs > > Just one note below... > > On 6/19/2017 19:57, Caza, Aaron wrote: > > > > Note that file /testdb/test is 16GB, twice the size of ram available in= this system. The /testdb directory is a ZFS file system with recordsize= =3D8k, chosen as ultimately it's intended to host a PostgreSQL database whi= ch uses an 8k page size. > Do not make this assumption blindly. Yes, I know the docs say to set > recordsize=3D8k but this is something you need to benchmark against your > actual working data set. > > MANY Postgres workloads are MUCH faster (2x or more!) if you use a > default page size and lz4 compression -- including one I have in > production and have extensively benchmarked. The difference is NOT small= . >.... > > zroot/ticker compressratio 1.53x - > zroot/ticker mounted yes - > zroot/ticker quota none default > zroot/ticker reservation none default > zroot/ticker recordsize 128K default > zroot/ticker mountpoint /usr/local/pgsql/data-ticker local > zroot/ticker sharenfs off default > zroot/ticker checksum fletcher4 > inherited from zroot > zroot/ticker compression lz4 > inherited from zroot > zroot/ticker atime off > inherited from zroot > > You may also want to consider setting logbias=3Dthroughput. In some case= s > the improvement there can be quite material as well -- depending on the > insert/update traffic to the database in question. > > -- > Karl Denninger > karl@denninger.net > /The Market Ticker/ > /[S/MIME encrypted email preferred]/ Thanks for the suggestions Karl. I'll investigate further after I resolve = this performance degradation issue I'm experiencing. I recently read anoth= er FreeBSD+ZFS+PostgreSQL user's Scale15x presentation, PostgreZFS, Sean Ch= ittenden if I recall correctly, who also advised lz4 compression + 16K page= size rather than 8K with PostgreZFS. With regards to my performance woes, I was originally using PostgreSQL in m= y posts to freebsd-hackers@freebsd.org but started using 'dd' to remove it = as a point of contention. In attempting to resolve this issue, I tried usi= ng your patch to PR 187594 (https://bugs.freebsd.org/bugzilla/show_bug.cgi?= id=3D187594). Took a bit of effort to find a revision of FreeBSD 10 Stable= to which your FreeBSD10 patch would both apply and compile cleanly; howeve= r, it didn't resolve the issue I'm experiencing. -- Aaron This message may contain confidential and privileged information. If it has= been sent to you in error, please reply to advise the sender of the error = and then immediately delete it. If you are not the intended recipient, do n= ot read, copy, disclose or otherwise use this message. The sender disclaims= any liability for such unauthorized use. PLEASE NOTE that all incoming e-m= ails sent to Weatherford e-mail accounts will be archived and may be scanne= d by us and/or by external service providers to detect and prevent threats = to our systems, investigate illegal or inappropriate behavior, and/or elimi= nate unsolicited promotional e-mails (spam). This process could result in d= eletion of a legitimate e-mail before it is read by its intended recipient = at our organization. Moreover, based on the scanning results, the full text= of e-mails and attachments may be made available to Weatherford security a= nd other personnel for review and appropriate action. If you have any conce= rns about this process, please contact us at dataprivacy@weatherford.com.