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(rs%bytecamp.net@80.84.212.123) by mail.bytecamp.net with ESMTPS (AES128-SHA encrypted); 4 Jul 2019 09:49:28 +0200 Subject: Re: extremely slow disk I/O after updating to 12.0 To: freebsd-questions@freebsd.org References: <5adc029e-198c-5189-cd6c-4fff1e4980f0@bytecamp.net> From: Robert Schulze Openpgp: preference=signencrypt Autocrypt: addr=rs@bytecamp.net; prefer-encrypt=mutual; keydata= mQENBFRpvvcBCACiXR5ENQUFzwmQCyyQmpG3ppKXS5GamZHZSl6dr+yeTRHW5XJ+46ltis64 U/i1V0DhBD9kHjAvwZvWO+BXVj1kf1GFf286WoUnFvRK6oLRtaqdZDDu+AA3EcvvryRzlkE9 uSBXkg+4ObhxhaLhjWowDBhmAyi3QOAtPpw9tme4c0ktoKMMlkryTAwPXw7sJi7TGJXv088T z2C2eMBKNKwyCWmGsP+0UoZRxO0A7qCU1kIGvsf7N9sYFD3OI9NaYZHvN8g7x7NTInz77a2o /u1EFYcQ6UbphP8AhUX9phvQLsZr0w0eCFQ+kJqtHWdesRckQcpDo8eXDQOvZH5vxErzABEB AAG0IFJvYmVydCBTY2h1bHplIDxyc0BieXRlY2FtcC5uZXQ+iQE+BBMBAgAoBQJUab73Ahsj BQkJZgGABgsJCAcDAgYVCAIJCgsEFgIDAQIeAQIXgAAKCRDDYTHqanMMhMpTB/4xAqtfANpm GYyHTt3z2250jx62GwDfK569dASQpiz1U7AwVvZDfsQSMpsIT/GkaDB5meNZVLYIvfpk1jmi CZ11b0WdERShxQhQsZCBWSIJG4jDfbbmhr212hi1rYzBisLb4+sU/V2Gdd42VUitkPItiv8X ImStSrzWiUAOmeXMEgJA6728sh692oYjsVQVXxRMwcAJSwwnlo32HRuAWK037oJ/04UoZijC chjdp8RIU2ItEjjAWQRcS+KHtj0cJurb+PE6WA8vDU18eLNVUcFRwJToa3dlSLN39R7icGuc SlN+HlCrqgqoHVMjX043wPjf3XEXtLcJTFyYcptyWjCuuQENBFRpvvcBCADhu4eObbfXhhzG 4/onzvW+g5t5k7XJMsLjGl7FAmn26CpSMTkHZCFmUR74Bz7Pr/l4RTRvFt1vnHWX/cKhcwnR g3ZId2a+xljT4pe77gV7+VQwdw5T80aMGe+ASeS0VqdzIyauZl0tzzVqh0/zcNLNE2KTo3el CENru7bOAAJ9nJ1PEVBgpE5P789duErp71HrDGG6SFdk+pFGKK41gJWktt0Tf13gikEiwsL/ xhYzuPqHV3Rj3vsIewbMLkC4Ekrsjqr4gKpTlrLhv9xOG/+SFIpdWy4pKY1dCLsR6lZXtbzE 31jXxuKGRjNlhm9eDfRfrN6LfKq2Z4Y+OZBUMWrbABEBAAGJASUEGAECAA8FAlRpvvcCGwwF CQlmAYAACgkQw2Ex6mpzDIQ0sgf/UI9D2tti9zGNZMgr9dLuMrdi+/olRo0C/PQIsw4NaBCh seXjQgTOdg99WvynZrvtt2eE1YCCnUORMyk1h8dtR3ZmFTMy9DAf7hiY99/avadM+rzoczEV WpZND88rD8JZ1WQKZtTDzH+c2wklkARo4XIu3KDqLEVHhdysN1vACEdHmi1FB3WNSLHF05Mf BUTOsyF3dEP625d03KK/91Sp31F0GJjlSTANxIM05bTcJZsG18auIIevn/19ZXSRdFAC7vy9 ugBfv0HVEC1QsarOCWpqJxQOutZI8I/AywGJetGVkTpKkTRnrIfzoBaFEJFGW96gyLSsWuZs B1zN8/OwHQ== Organization: bytecamp GmbH Message-ID: <3b067eb4-f0c7-4680-c3a9-6dac18f45952@bytecamp.net> Date: Thu, 4 Jul 2019 09:49:27 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: de-DE Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 1E129856BF X-Spamd-Bar: ---- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=bytecamp.net header.s=20140709 header.b=CXup6xcl; spf=pass (mx1.freebsd.org: domain of rs@bytecamp.net designates 212.204.60.217 as permitted sender) smtp.mailfrom=rs@bytecamp.net X-Spamd-Result: default: False [-4.27 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-0.95)[-0.951,0]; R_DKIM_ALLOW(-0.20)[bytecamp.net:s=20140709]; RCVD_COUNT_FIVE(0.00)[5]; FROM_HAS_DN(0.00)[]; R_SPF_ALLOW(-0.20)[+ip4:212.204.60.0/24]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-questions@freebsd.org]; TO_DN_NONE(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; RCPT_COUNT_ONE(0.00)[1]; HAS_ORG_HEADER(0.00)[]; DWL_DNSWL_LOW(-1.00)[bytecamp.net.dwl.dnswl.org : 127.0.5.1]; DMARC_NA(0.00)[bytecamp.net]; MX_GOOD(-0.01)[cached: mail2.bytecamp.net]; DKIM_TRACE(0.00)[bytecamp.net:+]; NEURAL_HAM_SHORT(-0.71)[-0.712,0]; IP_SCORE(-0.00)[country: DE(-0.01)]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_LAST(0.00)[]; ASN(0.00)[asn:12693, ipnet:212.204.32.0/19, country:DE]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_IN_DNSWL_LOW(-0.10)[217.60.204.212.list.dnswl.org : 127.0.5.1] X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 04 Jul 2019 07:49:31 -0000 Hi, Am 03.07.19 um 16:33 schrieb David Demelier: > Le 03/07/2019 à 13:43, Robert Schulze a écrit : >> we have seen a drop in I/O performance beginning with 11.2-RELEASE. >> Try disabling scattered ABD: >> >> sysctl vfs.zfs.abd_scatter_enabled=0 > > Thanks for the answer. I'm trying this. > > Is this tunable available at boot (i.e. /boot/loader.conf) or do you put > it in /etc/sysctl.conf? I have set this tuneable in /boot/loader.conf. with kind regards, Robert Schulze