From owner-freebsd-fs@FreeBSD.ORG Thu Aug 29 18:36:15 2013 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id 68EF3DD6 for ; Thu, 29 Aug 2013 18:36:15 +0000 (UTC) (envelope-from Robert.Burmeister@utoledo.edu) Received: from smtpin1.utoledo.edu (smtpin1.utoledo.edu [131.183.2.213]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 0FDF92F66 for ; Thu, 29 Aug 2013 18:36:14 +0000 (UTC) X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AqkAAGqTH1KDtwIWl2dsb2JhbABagzxRgmBHvTuBCxYOAQEBAQEIFgc8ghsKAQUjDwEgNg4BFgIFFgsCAgkDAgECAT8GBg0IAQGHawMPDKckiC4XTYhsgSmOaIJSgTQDmSKEfY52gg4 X-IronPort-AV: E=Sophos;i="4.89,984,1367985600"; d="scan'208,217";a="281910837" Received: from dlpint00.utoledo.edu ([131.183.2.22]) by smtpin1.utoledo.edu with ESMTP/TLS/DHE-RSA-AES256-SHA; 29 Aug 2013 14:36:13 -0400 Received: from MsgApp11.utad.utoledo.edu (msgapp11.utad.utoledo.edu [131.183.3.7]) by dlpint00.utoledo.edu (RSA Interceptor) for ; Thu, 29 Aug 2013 14:35:58 -0400 Received: from [192.168.1.65] (76.238.196.183) by Email.Utoledo.Edu (131.183.3.18) with Microsoft SMTP Server (TLS) id 14.2.328.9; Thu, 29 Aug 2013 14:35:57 -0400 Message-ID: <521F946D.9060805@UToledo.edu> Date: Thu, 29 Aug 2013 14:35:25 -0400 From: Robert Burmeister User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.28) Gecko/20120306 Thunderbird/3.1.20 To: Subject: dirhash default maxmem and reclaimage values References: 20111014135220.GA73637@icarus.home.lan X-Originating-IP: [76.238.196.183] X-RSA-Inspected: yes X-RSA-Classifications: public X-RSA-Action: allow MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.14 X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 29 Aug 2013 18:36:15 -0000 Would people with experience tuning dirhash check the list[1] http://freebsd.1045724.n5.nabble.com/Suggest-changing-dirhash-defaults- for-FreeBSD-9-2-td5839351.html and contribute any benchmarks that they have that are more recent than 2008? In question are: should vfs.ufs.dirhash_reclaimage be increased, if so what to? should vfs.ufs.dirhash_maxmem scale with kernel memory rather than RAM? (Autotuning maxmem on low RAM machines makes maxmem too small, and on large RAM machines scavenging 10% of maxmem on vm_lowmem events becomes too aggressive.) References 1. http://freebsd.1045724.n5.nabble.com/Suggest-changing-dirhash-defaults-for-FreeBSD-9-2-td5839351.html