Return-Path: Delivered-To: apmail-lucene-java-user-archive@www.apache.org Received: (qmail 78606 invoked from network); 6 Apr 2005 07:49:47 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (209.237.227.199) by minotaur.apache.org with SMTP; 6 Apr 2005 07:49:47 -0000 Received: (qmail 61902 invoked by uid 500); 6 Apr 2005 07:49:41 -0000 Delivered-To: apmail-lucene-java-user-archive@lucene.apache.org Received: (qmail 61786 invoked by uid 500); 6 Apr 2005 07:49:40 -0000 Mailing-List: contact java-user-help@lucene.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: java-user@lucene.apache.org Delivered-To: mailing list java-user@lucene.apache.org Received: (qmail 61770 invoked by uid 99); 6 Apr 2005 07:49:40 -0000 X-ASF-Spam-Status: No, hits=0.0 required=10.0 tests= X-Spam-Check-By: apache.org Received-SPF: pass (hermes.apache.org: local policy) Received: from Unknown (HELO ehatchersolutions.com) (69.55.225.129) by apache.org (qpsmtpd/0.28) with ESMTP; Wed, 06 Apr 2005 00:49:39 -0700 Received: by ehatchersolutions.com (Postfix, from userid 504) id 33DDC13E2137; Wed, 6 Apr 2005 03:49:37 -0400 (EDT) Received: from [192.168.1.100] (va-chrvlle-cad1-bdgrp1-4b-b-169.chvlva.adelphia.net [68.169.41.169]) by ehatchersolutions.com (Postfix) with ESMTP id F12A913E2136 for ; Wed, 6 Apr 2005 03:49:29 -0400 (EDT) Mime-Version: 1.0 (Apple Message framework v619.2) In-Reply-To: <16979.36652.728375.467978@tanto-xipolis.de> References: <6eaaed68ad071ce34613d9b154cf7368@ehatchersolutions.com> <200504012010.45671.paul.elschot@xs4all.nl> <8f323a5ab7400452c907eed693709ac8@ehatchersolutions.com> <16979.36652.728375.467978@tanto-xipolis.de> Content-Type: text/plain; charset=US-ASCII; format=flowed Message-Id: <35fa6df11129578c98ac54bed537930a@ehatchersolutions.com> Content-Transfer-Encoding: 7bit From: Erik Hatcher Subject: Re: Deeply nested boolean query performance Date: Wed, 6 Apr 2005 03:49:29 -0400 To: java-user@lucene.apache.org X-Mailer: Apple Mail (2.619.2) X-Spam-Checker-Version: SpamAssassin 3.0.1 (2004-10-22) on javelina X-Spam-Status: No, score=-1.2 required=5.0 tests=AWL,BAYES_00, RCVD_IN_NJABL_DUL,RCVD_IN_SORBS_DUL autolearn=no version=3.0.1 X-Spam-Level: X-Virus-Checked: Checked X-Spam-Rating: minotaur.apache.org 1.6.2 0/1000/N Thanks Morus. I will very soon be running experiments against a very large dataset using the trunk of Lucene and will report some statistics then. Erik On Apr 6, 2005, at 3:26 AM, Morus Walter wrote: > Hi Erik, >> >> Thanks for your very thorough response. It is very helpful. >> >> For all my projects, I'm using the latest Subversion codebase and >> staying current with any changes there, so that is very good news. >> > For lucene-1.4.final I find that some query on a real life index > of the form a AND b AND c AND d AND e AND f takes ~ 10 ms > a AND ( b AND ( c AND ( d AND ( e AND f ) ) ) ) ~ 42 ms > and ( ( ( ( ( a AND b ) AND c ) AND d ) AND e ) AND f ) ~ 33 ms > > Queries were repeated in order to exclude any IO time. Index size ~ 1 G > (~ 1.5 Mio documents), 6 hits. > > Of course that's not a systematic test, but I thought you might be > interested > anyway. I don't have the time to see how this would look like using > svn head. > > Morus > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org > For additional commands, e-mail: java-user-help@lucene.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org For additional commands, e-mail: java-user-help@lucene.apache.org