From owner-freebsd-stable@FreeBSD.ORG Thu Apr 8 01:24:19 2010 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id E4317106566B for ; Thu, 8 Apr 2010 01:24:18 +0000 (UTC) (envelope-from jhellenthal@gmail.com) Received: from mail-gy0-f182.google.com (mail-gy0-f182.google.com [209.85.160.182]) by mx1.freebsd.org (Postfix) with ESMTP id 85D208FC16 for ; Thu, 8 Apr 2010 01:24:18 +0000 (UTC) Received: by gyh20 with SMTP id 20so986117gyh.13 for ; Wed, 07 Apr 2010 18:24:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:sender:message-id:date:from :user-agent:mime-version:to:cc:subject:references:in-reply-to :x-enigmail-version:content-type:content-transfer-encoding; bh=4RiZ5EmVDLJsAwuxPYQcwXNgncscSBi6LPV2eVG9iD8=; b=sOoS540Rr1bYFjYzwS1vNQDWLUXFRb8IfkOd5XdZdswfXN5teJ7CepFXcVp1M42zIA uWE+smae86GmbGv0YCDauL2EwUKxePE9TOOrxSAbOzNvPVJM98KrVZoaSCrhyctc6YJ8 HForZNrCaoHwoGjpUbyUPp+Haai6T9Lr2fLu4= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=sender:message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:x-enigmail-version:content-type :content-transfer-encoding; b=aPhQQHs8whltwQlSFlM9TIw+BW44pZWSb5IqOXzKjVSzTcKsUcolGjWKiyiu2AEtSS qOcHdlsWrsG6vpTAPXjMnQSgEME61Z0ruF8rde3nIUfP8aR3JPLYzzvFofi86Qhoj1YL R1tY017egOX/o2QJZxJT03WWZ4K6kstDQn7rs= Received: by 10.150.188.18 with SMTP id l18mr4243515ybf.166.1270689857653; Wed, 07 Apr 2010 18:24:17 -0700 (PDT) Received: from centel.dataix.local (adsl-99-181-147-102.dsl.klmzmi.sbcglobal.net [99.181.147.102]) by mx.google.com with ESMTPS id 21sm3946926iwn.7.2010.04.07.18.24.14 (version=SSLv3 cipher=RC4-MD5); Wed, 07 Apr 2010 18:24:16 -0700 (PDT) Sender: "J. Hellenthal" Message-ID: <4BBD303D.3080906@dataix.net> Date: Wed, 07 Apr 2010 21:24:13 -0400 From: jhell User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.9.1.9) Gecko/20100331 Thunderbird/3.0.4 MIME-Version: 1.0 To: Jeremy Chadwick References: <20100215090756.GA54764@icarus.home.lan> <20100215105000.101326yj01j0f64g@webmail.leidinger.net> <20100215122744.GA57382@icarus.home.lan> <20100215161105.14071eiflhc9le68@webmail.leidinger.net> <4B79BA9C.3020402@quip.cz> <4B7AD0A3.9080701@barryp.org> <4BB0BC7C.3000801@barryp.org> <20100329161119.GA2421@icarus.home.lan> In-Reply-To: <20100329161119.GA2421@icarus.home.lan> X-Enigmail-Version: 1.0.1 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: FreeBSD Stable Subject: Re: ZFS Tuning - arc_summary.pl X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 08 Apr 2010 01:24:19 -0000 On 03/29/2010 12:11, Jeremy Chadwick wrote: > On Mon, Mar 29, 2010 at 09:43:08AM -0500, Barry Pederson wrote: >> From another thread I saw, it sounds like arc_max isn't really >> a "Hard Limit" but rather some kind of high water mark. If that's >> the case then I wonder if this might make more sense.... > > It became a hard limit in a semi-recent commit somewhere. I've lost > count of the modifications at this point. So, the perl script would > have to read __FreeBSD_version in /usr/include/osreldate.h and adjust > its output accordingly. > Update: The current version in head r52 has these modifications now. As a side note while doing the the original modification I noticed some strange values (negative) and decided to just branch what I already had in head to stable/7 and continue with the modifications in head. arc_summary.pl has not been updated in the downloads section until I investigate more what happened with those negative values and why. I will probably be adding some more (2) lines to the ARC Size Breakdown area that compares its current usage to the the target_size so a comparison can be done side-by-side of the difference to current size and what it would look like at the target_size. Regards, -- jhell