From owner-freebsd-questions@freebsd.org Fri Jan 22 00:06:58 2016 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 6E535A8AFC0 for ; Fri, 22 Jan 2016 00:06:58 +0000 (UTC) (envelope-from zhao6014@gmail.com) Received: from mail-yk0-x229.google.com (mail-yk0-x229.google.com [IPv6:2607:f8b0:4002:c07::229]) (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 2ED7C1512 for ; Fri, 22 Jan 2016 00:06:58 +0000 (UTC) (envelope-from zhao6014@gmail.com) Received: by mail-yk0-x229.google.com with SMTP id k129so68986648yke.0 for ; Thu, 21 Jan 2016 16:06:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=5Ky4lhm+k8wMKcOEFwndXRDclSicFayMqkF6GbiaAvI=; b=POaX6sm3FNOQAFtX69ksMTOQflTPrePQUCVxHTCA9n3oNIpM1aax2xU6Yt5YSHzd6d zr67iXRMYMDRqjs1OKQruAb4IDrATr65HcDrTv0gYkTfmHNKoWnV5ZHINZUpRrW0RBtN cEybiC5MH0hsGSg27yWu50mgLVo+SMRJ9UERlYl2jkitZyXPmDnTqrgFrnPJpKLr32Cc bCy7LvCXR9a5II55kL06jpJmvPYjnhwaRtTPddl+J/iNJ0x3gZzb6WCxiZoPR9+SF7GS jQgViCxRRO/trvUYiWZz52IjHkvXF/PWVAcwIOZjSil5/ECKAGa4CgFwH15tk+gfjSYD EHXw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=5Ky4lhm+k8wMKcOEFwndXRDclSicFayMqkF6GbiaAvI=; b=A2OvtuFzc6gdYSNhC0LZtbXVPpZn/ja6N2485zVgpoSq4R2gPrWXvCmbWcWzRCtR/b eONLTu49WscuelQGjWzEvI1sjj3cA35Uwk2/lPKDW0xCOsX6p8BaMND2B7u7Pz/Q0a0J ITUuid8K5P/LADhR+haeABc/SMGcVPmipnDcilJcPBG8YJyKEqY/HqpNk0zu2k0Qj32f /epvPFyWBcT0RjPrpkH+4if3D4qku9OS0HZVIMyXEomr/Mtf1k65PM4uvs8bZ2cK1fsb EdvL+Y4DqqIoiTLcuC34iBJs3caXfy+xZiNnrYu0yScewwClPaPhT1XUm8E6Gntvx39U /BWw== X-Gm-Message-State: AG10YOR05PXAAxYHFGDppjCbCj3VgmN9K3GWl799sOOdG990Ek5fH6UYswYOGwETaufevUsHMGWdTR0vIVRTMQ== MIME-Version: 1.0 X-Received: by 10.13.243.65 with SMTP id c62mr68051ywf.96.1453421217288; Thu, 21 Jan 2016 16:06:57 -0800 (PST) Received: by 10.37.45.86 with HTTP; Thu, 21 Jan 2016 16:06:57 -0800 (PST) Received: by 10.37.45.86 with HTTP; Thu, 21 Jan 2016 16:06:57 -0800 (PST) In-Reply-To: <20160121235545.GK4538@blisses.org> References: <20160121205139.GG4538@blisses.org> <20160121232810.GJ4538@blisses.org> <20160121235545.GK4538@blisses.org> Date: Fri, 22 Jan 2016 08:06:57 +0800 Message-ID: Subject: Re: ZFS performance help sought From: Jov To: Mason Loring Bliss Cc: dweimer , freebsd-questions@freebsd.org Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.20 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 22 Jan 2016 00:06:58 -0000 sys% 62.6 is wired=EF=BC=8Cwhat ie your disk type=EF=BC=9Fplease post the o= utput of iostat -x 1 2016=E5=B9=B41=E6=9C=8822=E6=97=A5 7:56 AM=EF=BC=8C"Mason Loring Bliss" =E5=86=99=E9=81=93=EF=BC=9A > On Thu, Jan 21, 2016 at 06:28:10PM -0500, Mason Loring Bliss wrote: > > > All that said, I wasn't setting write_limit_override, so I'm trying > that, and > > I'm cutting the txg.timeout back a couple seconds more. > > Well, that didn't help. System's still really choppy. > > last pid: 1707; load averages: 9.20, 4.75, 2.14 up 0+00:09:35 > 18:53:03 > 55 processes: 1 running, 54 sleeping > CPU: 2.1% user, 0.0% nice, 62.6% system, 0.5% interrupt, 34.8% idle > Mem: 323M Active, 331M Inact, 4589M Wired, 8928K Cache, 2677M Free > ARC: 4096M Total, 916M MFU, 2303M MRU, 845M Anon, 17M Header, 15M Other > Swap: 8192M Total, 8192M Free > > PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU > COMMAND > 1501 root 1 33 0 42248K 3616K dmu_tx 1 0:10 5.76% zfs > 1500 root 1 24 0 42248K 3768K pipewr 0 0:08 5.18% zfs > > Here's what I set: > > vfs.zfs.arc_max=3D"4096M" > vfs.zfs.arc_min=3D"1024M" > vfs.zfs.txg.timeout=3D"3" > vfs.zfs.write_limit_override=3D"512M" > > I'm not seeing any obvious way to verify the write_limit_override setting= - > it appears not to show up in sysctl output. > > I'll wait for the current big transfer to finish and then I'll try it wit= h > prefetch disabled too. > > -- > Mason Loring Bliss mason@blisses.org Ewige Blumenkraft! > awake ? sleep : random() & 2 ? dream : sleep; -- Hamlet, Act III, Scene I > _______________________________________________ > freebsd-questions@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to " > freebsd-questions-unsubscribe@freebsd.org" >