Date: Fri, 14 Oct 2016 11:43:30 +0200 From: Fabian Keil <freebsd-listen@fabiankeil.de> To: Michael Osipov <1983-01-06@gmx.net> Cc: freebsd-geom@freebsd.org Subject: Re: Abysmally slow write to geom class volume over network Message-ID: <20161014114330.396fe534@fabiankeil.de> In-Reply-To: <636763f0-a732-18ba-262b-c3fc01f4342c@gmx.net> References: <33da0f73-48f1-4727-fe76-41343dc4955b@gmx.net> <18314f27-849b-31df-d88d-af64e89c133f@gmx.net> <346c7da7-02b2-ba34-1463-f3f0a5a3cd9a@rlwinm.de> <15e9cb94-7ad8-e547-b06a-699ce2250624@gmx.net> <20161013014143.GA1669@funkthat.com> <636763f0-a732-18ba-262b-c3fc01f4342c@gmx.net>
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--Sig_/cAhz0Jgv60TflM0qjGYUZ2u Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Michael Osipov <1983-01-06@gmx.net> wrote: > Am 2016-10-13 um 03:41 schrieb John-Mark Gurney: > > Michael Osipov wrote this message on Wed, Oct 12, 2016 at 20:54 > > +0200: =20 > >> As if there is a bottleneck between socket read and geom write to FS. > >> > >> Is that better? =20 > > > > Have you run gstat on the system to see if there is an IO bottle > > neck? Since you are using graid3, you want to look to see if > > it's %busy is ~100, while the underlying components are not. =20 >=20 > This is hardly impossible because as soon as I start some SFTP transfer,= =20 > all of my SSH sessions free or receive connetion timeout/abort. Doing a= =20 > SFTP from FreeBSD to FreeBSD gives me on both physical disks and RAID3=20 > volume a busy of zero to one perfect. In other terms, the drives are > bored. Try checking the FAIL and SLEEP columns in the "vmstat -z" output. This could be related to: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D209680#c2 Fabian --Sig_/cAhz0Jgv60TflM0qjGYUZ2u Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEARECAAYFAlgAqMMACgkQBYqIVf93VJ3DXQCeJglkl/Nfsdizp2qglBI1fo+i niYAnRm6Nyc01Mp+bqHgP9vmOOjjTmXy =Y7jL -----END PGP SIGNATURE----- --Sig_/cAhz0Jgv60TflM0qjGYUZ2u--
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