From nobody Fri Mar 04 16:22:56 2022 X-Original-To: freebsd-fs@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id D5C9B19E4F58 for ; Fri, 4 Mar 2022 16:23:03 +0000 (UTC) (envelope-from karl@denninger.net) Received: from colo1.denninger.net (colo1.denninger.net [104.236.120.189]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4K9Cng1yrVz3sTn for ; Fri, 4 Mar 2022 16:23:03 +0000 (UTC) (envelope-from karl@denninger.net) Received: from denninger.net (097-081-026-048.res.spectrum.com [97.81.26.48]) by colo1.denninger.net (Postfix) with ESMTP id 9DE9A2110B2 for ; Fri, 4 Mar 2022 11:22:57 -0500 (EST) Received: from [192.168.10.25] (D15.Denninger.Net [192.168.10.25]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by denninger.net (Postfix) with ESMTPSA id 4F51724CD9D for ; Fri, 4 Mar 2022 11:22:57 -0500 (EST) Message-ID: <97013161-b119-4c98-a294-c733ca000a34@denninger.net> Date: Fri, 4 Mar 2022 11:22:56 -0500 List-Id: Filesystems List-Archive: https://lists.freebsd.org/archives/freebsd-fs List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-fs@freebsd.org MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.6.1 Content-Language: en-US To: freebsd-fs@freebsd.org From: Karl Denninger Subject: md disks EXTREMELY slow 12.3-STABLE Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-512; boundary="------------ms040805000707010801050004" X-Rspamd-Queue-Id: 4K9Cng1yrVz3sTn X-Spamd-Bar: ----- Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=pass (policy=none) header.from=denninger.net; spf=pass (mx1.freebsd.org: domain of karl@denninger.net designates 104.236.120.189 as permitted sender) smtp.mailfrom=karl@denninger.net X-Spamd-Result: default: False [-5.85 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; FREEFALL_USER(0.00)[karl]; FROM_HAS_DN(0.00)[]; SIGNED_SMIME(-2.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; R_SPF_ALLOW(-0.20)[+mx]; MIME_GOOD(-0.20)[multipart/signed,multipart/alternative,text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-fs@freebsd.org]; TO_DN_NONE(0.00)[]; HAS_ATTACHMENT(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; NEURAL_HAM_LONG(-0.95)[-0.954]; RCVD_COUNT_THREE(0.00)[3]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; NEURAL_HAM_SHORT(-1.00)[-1.000]; DMARC_POLICY_ALLOW(-0.50)[denninger.net,none]; MLMMJ_DEST(0.00)[freebsd-fs]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:+,3:~,4:~]; ASN(0.00)[asn:14061, ipnet:104.236.64.0/18, country:US]; RCVD_TLS_LAST(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; RECEIVED_SPAMHAUS_PBL(0.00)[97.81.26.48:received] X-ThisMailContainsUnwantedMimeParts: N This is a cryptographically signed message in MIME format. --------------ms040805000707010801050004 Content-Type: multipart/alternative; boundary="------------K4SjODmFa6lpgcokx0SkZXxk" --------------K4SjODmFa6lpgcokx0SkZXxk Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Not a little slow, RIDICULOUSLY slow. Crochet uses these.  Since 12.3 the effective I/O rate, which pegs them at 100% busy, is in the 50tps (!!) range.  This is a machine with a crap-ton of available RAM (over 10Gb) and effectively no swap use, running off SSD for the root pool (ZFS.) Load average is 0.3 yet the md0 drive is pinned at 100% busy with just 50 transactions-per-second! This used to be fast in 12.2 and before. Any ideas as to what might have changed that is causing this? FreeBSD 12.3-STABLE #18 stable/12-n234659-7963d46bb8c-dirty: Wed Dec 29 10:59:44 EST 2021 -- Karl Denninger karl@denninger.net /The Market Ticker/ /[S/MIME encrypted email preferred]/ --------------K4SjODmFa6lpgcokx0SkZXxk Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit

Not a little slow, RIDICULOUSLY slow.

Crochet uses these.  Since 12.3 the effective I/O rate, which pegs them at 100% busy, is in the 50tps (!!) range.  This is a machine with a crap-ton of available RAM (over 10Gb) and effectively no swap use, running off SSD for the root pool (ZFS.)  Load average is 0.3 yet the md0 drive is pinned at 100% busy with just 50 transactions-per-second!

This used to be fast in 12.2 and before.

Any ideas as to what might have changed that is causing this?

FreeBSD 12.3-STABLE #18 stable/12-n234659-7963d46bb8c-dirty: Wed Dec 29 10:59:44 EST 2021    

--
Karl Denninger
karl@denninger.net
The Market Ticker
[S/MIME encrypted email preferred]
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