Date: Wed, 21 Jun 2017 08:58:42 +0100 From: Steven Hartland <killing@multiplay.co.uk> To: freebsd-fs@freebsd.org Subject: Re: FreeBSD 11.1 Beta 2 ZFS performance degradation on SSDs Message-ID: <e2fa773a-bec7-432f-86c4-7a981863f0b2@multiplay.co.uk> In-Reply-To: <47a7d5714e3c4db4aacb6a65d82d8077@DM2PR58MB013.032d.mgd.msft.net> References: <47a7d5714e3c4db4aacb6a65d82d8077@DM2PR58MB013.032d.mgd.msft.net>
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While that may be the fix the behavior is interesting none the less, see my other reply about IOPs sizing. On 20/06/2017 23:02, Caza, Aaron wrote: > With regards to this issue, it's a case of the old FreeBSD 9.0 settings not working the same as in FreeBSD 10 & 11: the ZFS ARC min & max settings I was utilizing were too aggressive. > > On a separate server with 18 days of uptime, bumping vfs.zfs.arc_min and vfs.zfs.arc_max up to something more reasonable sans reboot restored performance. > > Apologies for the noise and thanks for the suggestions. >
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