From owner-freebsd-questions@freebsd.org Thu Oct 12 13:32:55 2017 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id D200BE29CE8 for ; Thu, 12 Oct 2017 13:32:55 +0000 (UTC) (envelope-from amvandemore@gmail.com) Received: from mail-it0-x22c.google.com (mail-it0-x22c.google.com [IPv6:2607:f8b0:4001:c0b::22c]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 990F777504 for ; Thu, 12 Oct 2017 13:32:55 +0000 (UTC) (envelope-from amvandemore@gmail.com) Received: by mail-it0-x22c.google.com with SMTP id j140so6866600itj.1 for ; Thu, 12 Oct 2017 06:32:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=WVkJYkXMWWMuvSiQKPaHoslqsZxL7GMF8JQtvlrYCg8=; b=ueXBYhdYcARqs+RLEvy7XEd78YVPp+BJjo6D6sjJMJOMC9PYRCM9u8ZyCE4X/6PWig 6oRtkkJNbvQgH3tKq/y/WxexVoMpv07bT9nR9wSNBJq7jgfqGj3bc4qjGs951pNwSxf3 GCihw3p1HMpEY3/jdq6IPl0orqrq8ivILlPMaBCN09dIIYScwPWhhzbYXQG9KiID6rIP eFSe1d9hFb4igk5QIhpewWdfZeULY6aN5hj+Nyxi4H714nu69QPCnQ7kzut6dqzK4NCq rtqDiGzugTJFwKYsE905beURaJZPZ59wlUEosf+flRSddTGnpLunKQa4aYIaq9F5sFgz YVjQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=WVkJYkXMWWMuvSiQKPaHoslqsZxL7GMF8JQtvlrYCg8=; b=h5fYZJzJhNKI/jam1NDoGxDxioIcj2til6kthAZ4gAvvbyXcC5tjCU+XTm5AItybQZ J8KaEYTcwlK0s2UsWyrBR3X/1IJXEC9A6NfABXxFUlLhp6Nz1OM/R8qMU31ahW7/7I0o LxMY5/c6zmZxDD78tiom4fBOwEJDsEd6PDVWzJYeAFbgPhf6G/IpS1x3ZTh2FqGur+ob Mwqnb+Y2nLyX0LGojrTQEzdglsHF5mnjjMUix5rNq3HGSPEgXbNUy2h/g9eVKFk1YKVW R7inRSX1Y+KEddljf9wkCACRv/ffp3yoPZCYHhWLy9QL5JmrqBqBhRihVni8dwFPfVpw KVzw== X-Gm-Message-State: AMCzsaVvLIu26pZz8sVSrnGFYaEyxGVOjUK8TvhLPgFBisYWvSvUbSzc rO3aY2eWp0CnbPbP2h1k506V+Iymzi6P1uAn+EemVg== X-Google-Smtp-Source: AOwi7QDIh58ErE800kRkQx/bnGtbWN6Iei9C8/NsV0/kDCodRvfaHSaBF7PCFwg5cb3mkBcLSf5GzYAUZVm3gSSe9SM= X-Received: by 10.36.252.68 with SMTP id b65mr1053573ith.151.1507815174848; Thu, 12 Oct 2017 06:32:54 -0700 (PDT) MIME-Version: 1.0 Received: by 10.2.176.201 with HTTP; Thu, 12 Oct 2017 06:32:54 -0700 (PDT) In-Reply-To: <20171012103809.GF24374@apple.rat.burntout.org> References: <20171011130512.GE24374@apple.rat.burntout.org> <20171012103809.GF24374@apple.rat.burntout.org> From: Adam Vande More Date: Thu, 12 Oct 2017 08:32:54 -0500 Message-ID: Subject: Re: FreeBSD ZFS file server with SSD HDD To: Kate Dawson Cc: FreeBSD Questions Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.23 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 12 Oct 2017 13:32:55 -0000 On Thu, Oct 12, 2017 at 5:38 AM, Kate Dawson wrote: > > > > > set to the default. Have you tried any other zfs or nfs tuning? If so, > > please share those details. > > > vfs.zfs.l2arc_noprefetch=0 > > zfs get sync tank/exports/xendomu > NAME PROPERTY VALUE SOURCE > tank/exports/xendomu sync disabled local > > > > > > Does gstat reveal anything useful? > > > > Thanks for this tool... on regular occasions drives show high percentage > busy > The output from arc_summary.pl may be useful to understand ZFS's performance as well. -- Adam