Date: Mon, 12 Feb 2018 11:07:07 +0200 From: Andriy Gapon <avg@FreeBSD.org> To: Peter Jeremy <peter@rulingia.com>, "E.S. Rosenberg" <esr@cs.huji.ac.il> Cc: freebsd-fs@freebsd.org Subject: Re: raw filesystem counters Message-ID: <7e201ce9-6162-ae5e-ea54-6f98cf2dd29f@FreeBSD.org> In-Reply-To: <20180212055505.GD3353@server.rulingia.com> References: <CA%2BK1OzSda42zBCfT4n0_DScf74TsJyHsxBHaxZwcjkOe3ccmwA@mail.gmail.com> <20180212055505.GD3353@server.rulingia.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On 12/02/2018 07:55, Peter Jeremy wrote: > On 2018-Feb-11 21:06:12 +0200, "E.S. Rosenberg" <esr@cs.huji.ac.il> wrote: >> Is there any way to access raw disk counters similar to those found on >> Linux in: >> /sys/class/block/<device>/stat >> >> Preferably also by accessing such a virtual file and not by using iostat / >> zpool iostat which are already pre-processing counters and need to be run >> constantly to get accurate real-time estimates. > > For the raw disk data, have a look at the statistics functions in > libgeom(3). You can use the source code for gstat(8) to get a better idea > how to drive it. Or maybe devstat(3). > I don't know of any published API for vdev-level ZFS statistics and, > unfortunately, "zpool iostat" only supports "humanized" output, which makes > it difficult to use them as input to further monitoring. There are some > ARC statistics under sysctl kstat.zfs.misc > -- Andriy Gapon
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?7e201ce9-6162-ae5e-ea54-6f98cf2dd29f>