From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hans Reiser Subject: Re: iozone reality check: was zam, please discuss this Date: Thu, 24 Jun 2004 00:11:20 -0700 Message-ID: <40DA7E98.1070707@namesys.com> References: <40D8EB0D.6050109@namesys.com> <20040623063049.GA5080@backtop.namesys.com> <40DA58BC.1060203@namesys.com> <40D9C5F5.7010605@comcast.net> <40DA62E0.2050803@namesys.com> <40D9CDC0.30503@comcast.net> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: list-help: list-unsubscribe: list-post: Errors-To: flx@namesys.com In-Reply-To: <40D9CDC0.30503@comcast.net> List-Id: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: George Beshers Cc: ReiserFS List George Beshers wrote: > > > Hans Reiser wrote: > >> >> When you say lots, do you mean close to or more than physical ram? >> > My recollection is that it was on the order of 70% of physical ram; there > was significant other activity on the system so it was getting flushed to > disk some of the time, but I was not actually measuring that. I was > looking > at cache-coherency across processor nodes and noticed that most of > the pages in the mmap'd area were touched (modified). > > > > > Ok, this qualifies as an app where it matters.