Return-Path: Delivered-To: apmail-db-derby-dev-archive@www.apache.org Received: (qmail 79014 invoked from network); 7 Sep 2004 19:23:23 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (209.237.227.199) by minotaur-2.apache.org with SMTP; 7 Sep 2004 19:23:23 -0000 Received: (qmail 57078 invoked by uid 500); 7 Sep 2004 19:23:03 -0000 Delivered-To: apmail-db-derby-dev-archive@db.apache.org Received: (qmail 56978 invoked by uid 500); 7 Sep 2004 19:23:02 -0000 Mailing-List: contact derby-dev-help@db.apache.org; run by ezmlm Precedence: bulk list-help: list-unsubscribe: list-post: List-Id: "Derby Development" Reply-To: "Derby Development" Delivered-To: mailing list derby-dev@db.apache.org Received: (qmail 56906 invoked by uid 99); 7 Sep 2004 19:23:01 -0000 X-ASF-Spam-Status: No, hits=0.0 required=10.0 tests=RCVD_BY_IP X-Spam-Check-By: apache.org Received-SPF: pass (hermes.apache.org: local policy) Received: from [216.39.128.18] (HELO smtp3.sea.theriver.com) (216.39.128.18) by apache.org (qpsmtpd/0.28) with SMTP; Tue, 07 Sep 2004 12:22:59 -0700 Received: (qmail 22085 invoked from network); 7 Sep 2004 19:22:56 -0000 Received: from c-67-170-1-160.client.comcast.net (HELO [192.168.1.101]) (occam@67.170.1.160) by 199.201.191.1 with SMTP; Tue, 07 Sep 2004 19:22:56 +0000 Mime-Version: 1.0 (Apple Message framework v619) In-Reply-To: References: Content-Type: text/plain; charset=US-ASCII; format=flowed Message-Id: <52071FA1-0103-11D9-A502-000D93ADDBD4@serv.net> Content-Transfer-Encoding: 7bit From: Joseph Grace Subject: Re: java1.4.2 "rws" mode - log write performance - OSX numbers Date: Tue, 7 Sep 2004 12:22:55 -0700 To: derby-dev@db.apache.org X-Mailer: Apple Mail (2.619) X-Virus-Checked: Checked X-Spam-Rating: minotaur-2.apache.org 1.6.2 0/1000/N Suresh: > Does Mac OS has concept of write cache enabling ? Numbers below > are with write cache enabled/disabled ? Yes, OSX has write cache enabling. Presumably it's on by default (though I admit to not knowing how to confirm that), so my numbers include it. That's why I ran the test under a variety of circumstances. Benchmarks are hard, and the numbers vary a lot, so I flagged the variance. I'm not sure what all the factors are, but I believe your (implied) suspicion that cache'ing is one such factor. = Joe =