Date: Tue, 24 Nov 2015 09:30:19 -0500 From: Mike Tancsa <mike@sentex.net> To: Albert Cervin <albert@acervin.com>, freebsd-stable@freebsd.org Subject: Re: ZFS - poor performance with "large" directories Message-ID: <5654747B.10902@sentex.net> In-Reply-To: <CAMMK2LCB5ocjyufZCMXQScQDgVxvSHOr0vmef6LKzPO35w3TQg@mail.gmail.com> References: <CAMMK2LCB5ocjyufZCMXQScQDgVxvSHOr0vmef6LKzPO35w3TQg@mail.gmail.com>
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On 11/24/2015 9:00 AM, Albert Cervin wrote: > However, we are seeing en exponential decrease in performance to write to > the file server when the number of files in the directory grows (when it > goes up to ~6000 files it becomes unusable and the write time has gone from > a fraction of a second to ten seconds). Have you tried adjusting vfs.zfs.arc_meta_limit to a higher value ? Do you have any memory pressures on your server ? Have a look at this thread https://lists.freebsd.org/pipermail/freebsd-fs/2013-February/016492.html ---Mike -- ------------------- Mike Tancsa, tel +1 519 651 3400 Sentex Communications, mike@sentex.net Providing Internet services since 1994 www.sentex.net Cambridge, Ontario Canada http://www.tancsa.com/
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