From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752111Ab0ETM3Z (ORCPT ); Thu, 20 May 2010 08:29:25 -0400 Received: from moutng.kundenserver.de ([212.227.126.187]:61304 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751182Ab0ETM3X (ORCPT ); Thu, 20 May 2010 08:29:23 -0400 Date: Thu, 20 May 2010 14:29:19 +0200 From: Heinz Diehl To: linux-kernel@vger.kernel.org Cc: linux-mm Subject: Re: RFC: dirty_ratio back to 40% Message-ID: <20100520122919.GA3420@fancy-poultry.org> References: <4BF51B0A.1050901@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4BF51B0A.1050901@redhat.com> X-Accept-Language: no,dk,se,en,de Organization: private site X-OpenPGP-KeyID: 0xA9353F12 X-OpenPGP-Fingerprint: C67E 9A93 1033 DF8A 9321 9F90 DC39 B8C3 A935 3F12 X-OpenPGP-URL: http://www.fritha.org/htd.asc User-Agent: Mutt/1.5.20+20100519 (GNU/Linux) X-Provags-ID: V01U2FsdGVkX1+SuIc99aNIBHeg4qdRFrIwCsP3xNBWYytuwDh a63Tx2mHMNAGA71tRvdZ5Ly4VKY3us7enB5GJC0Pyow9fDRQpY tL/q8lkd0CLt7DUd/lm9Q== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 20.05.2010, Larry Woodman wrote: > Increasing the dirty_ratio to 40% will regain the performance loss seen > in several benchmarks. Whats everyone think about this??? These are tuneable via sysctl. What I have in my /etc/sysctl.conf is vm.dirty_ratio = 4 vm.dirty_background_ratio = 2 This writes back the data more often and frequently, thus preventing the system from long stalls. Works at least for me. AMD Quadcore, 8 GB RAM.