From owner-freebsd-fs@FreeBSD.ORG Thu Apr 22 21:14:49 2010 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 6D9901065675 for ; Thu, 22 Apr 2010 21:14:49 +0000 (UTC) (envelope-from avg@icyb.net.ua) Received: from citadel.icyb.net.ua (citadel.icyb.net.ua [212.40.38.140]) by mx1.freebsd.org (Postfix) with ESMTP id B078C8FC12 for ; Thu, 22 Apr 2010 21:14:48 +0000 (UTC) Received: from porto.topspin.kiev.ua (porto-e.starpoint.kiev.ua [212.40.38.100]) by citadel.icyb.net.ua (8.8.8p3/ICyb-2.3exp) with ESMTP id AAA15202; Fri, 23 Apr 2010 00:14:45 +0300 (EEST) (envelope-from avg@icyb.net.ua) Received: from localhost.topspin.kiev.ua ([127.0.0.1]) by porto.topspin.kiev.ua with esmtp (Exim 4.34 (FreeBSD)) id 1O53jQ-0008Xf-Rl; Fri, 23 Apr 2010 00:14:44 +0300 Message-ID: <4BD0BC44.1040204@icyb.net.ua> Date: Fri, 23 Apr 2010 00:14:44 +0300 From: Andriy Gapon User-Agent: Thunderbird 2.0.0.24 (X11/20100321) MIME-Version: 1.0 To: jhell References: <4BC86CF3.7060708@icyb.net.ua> <4BCEF7E4.6080606@dataix.net> In-Reply-To: <4BCEF7E4.6080606@dataix.net> X-Enigmail-Version: 0.96.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: freebsd-fs@freebsd.org Subject: Re: some arc_reclaim_needed stats X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Apr 2010 21:14:49 -0000 on 21/04/2010 16:04 jhell said the following: > If these are not tunable values and serve a good purpose as a stat to be > added at some point, would they not be better in kstat.zfs.misc? rather > than vfs.zfs so they can be collected with the rest of the stats via > arc_summary.pl. Yes, I agree. But right now no one seems to think that there is anything useful about these stats :-) > Without seeing the thread "kstat.zfs.misc.arcstats.hash_collisions" I > had updated the arc_summary.pl script yesterday to include these under a > "ARC Misc" section in the output. Just a FYI in case it may be useful to > you or others. BTW, it would be nice if hash table size (number of buckets) would be reported too. But that's a kernel change, not arc_summary. -- Andriy Gapon