Date: Wed, 14 Jun 2017 17:11:15 +0000 From: "Caza, Aaron" <Aaron.Caza@ca.weatherford.com> To: "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org> Subject: Re: FreeBSD10 Stable + ZFS + PostgreSQL + SSD performance drop < 24 hours Message-ID: <5fb864560929410bafc6a233d374c620@DM2PR58MB013.032d.mgd.msft.net>
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Further to this: I've now tested FreeBSD 10.3-RELEASE-p19 and FreeBSD 11.0-STABLE #0 r307264M, both of which suffer the same degraded performance. test$ uname -a FreeBSD xyz.com 10.3-RELEASE-p19 FreeBSD 10.3-RELEASE-p19 #0 r319904M: Tue Jun 13 12:38:29 MDT 2017 aaronc@WFT:XYZ amd64 test$ uptime 10:15AM up 21:09, 2 users, load averages: 1.00, 1.14, 1.30 test$ dd if=/testdb/test of=/dev/null bs=1m 16000+0 records in 16000+0 records out 16777216000 bytes transferred in 200.379127 secs (83727363 bytes/sec) After reboot: test$ dd if=/testdb/test of=/dev/null bs=1m 16000+0 records in 16000+0 records out 16777216000 bytes transferred in 23.213040 secs (722749623 bytes/sec) Same Intel Xeon E31240 with 8GB ram and 2x Samsung 850 Pro 256GB SSDs as before. 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 not read, copy, disclose or otherwise use this message. The sender disclaims any liability for such unauthorized use. PLEASE NOTE that all incoming e-mails sent to Weatherford e-mail accounts will be archived and may be scanned by us and/or by external service providers to detect and prevent threats to our systems, investigate illegal or inappropriate behavior, and/or eliminate unsolicited promotional e-mails (spam). This process could result in deletion 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 and other personnel for review and appropriate action. If you have any concerns about this process, please contact us at dataprivacy@weatherford.com.home | help
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