Return-Path: Received: from int-mailstore01.merit.edu ([207.75.116.232]:60489 "EHLO int-mailstore01.merit.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752956Ab1CPPbb (ORCPT ); Wed, 16 Mar 2011 11:31:31 -0400 Date: Wed, 16 Mar 2011 11:31:29 -0400 From: Jim Rees To: Chuck Lever Cc: Judith Flo Gaya , "linux-nfs@vger.kernel.org" Subject: Re: problem with nfs latency during high IO Message-ID: <20110316153129.GB12187@merit.edu> References: <526EE4AA-ABD2-4452-9C3A-C000BD3CFC60@oracle.com> <4D7FA11F.5020604@imppc.org> <21A84B17-E061-4441-9181-100AC8E473E2@oracle.com> <4D7FDB14.6090908@imppc.org> <9CC4990D-6969-4788-8B52-BA5AF2743DE3@oracle.com> <4D7FE0E8.5050701@imppc.org> <16BF52F0-4D1A-4B68-ADEE-DC70255A139C@oracle.com> <4D80A2DE.2030507@imppc.org> <20110316151827.GA12187@merit.edu> Content-Type: text/plain; charset=us-ascii In-Reply-To: <20110316151827.GA12187@merit.edu> Sender: linux-nfs-owner@vger.kernel.org List-ID: MIME-Version: 1.0 Jim Rees wrote: I think 5 is the minimum for dirty_ratio, although this doesn't seem to be documented anywhere. If you want to set it lower, you have to use dirty_bytes instead of dirty_ratio. Never mind, I just looked at the code and the 5% limit seems to have been removed later. Last time I looked at this code was 3 years ago.