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 r307264= M, 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=3D/testdb/test of=3D/dev/null bs=3D1m 16000+0 records in 16000+0 records out 16777216000 bytes transferred in 200.379127 secs (83727363 bytes/sec) After reboot: test$ dd if=3D/testdb/test of=3D/dev/null bs=3D1m 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 be= fore. 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.
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