Return-Path: Received: from ensim.rackshack.net (root@localhost) by orafaq.net (8.11.6/8.11.6) with ESMTP id h1GHmvT14325 for ; Sun, 16 Feb 2003 11:48:57 -0600 X-ClientAddr: 209.68.248.164 Received: from newsfeed.cts.com (newsfeed.cts.com [209.68.248.164]) by ensim.rackshack.net (8.11.6/8.11.6) with ESMTP id h1GHmuQ14320 for ; Sun, 16 Feb 2003 11:48:56 -0600 Received: from fatcity.UUCP (uucp@localhost) by newsfeed.cts.com (8.9.3/8.9.3) with UUCP id GAA70681; Sun, 16 Feb 2003 06:32:01 -0800 (PST) Received: by fatcity.com (26-Feb-2001/v1.0g-b72/bab) via UUCP id 0054EDAD; Sun, 16 Feb 2003 05:38:39 -0800 Message-ID: Date: Sun, 16 Feb 2003 05:38:39 -0800 To: Multiple recipients of list ORACLE-L X-Comment: Oracle RDBMS Community Forum X-Sender: Anjo Kolk Sender: root@fatcity.com Reply-To: ORACLE-L@fatcity.com Errors-To: ML-ERRORS@fatcity.com From: Anjo Kolk Subject: Re: Know 1 database, know them all? Organization: Fat City Network Services, San Diego, California X-ListServer: v1.0g, build 72; ListGuru (c) 1996-2001 Bruce A. Bergman Precedence: bulk Mime-Version: 1.0 Content-Type: text/plain; Content-Transfer-Encoding: 8bit It depends on the level you are looking at it. From a high level, every database does PIO (read/write data to disk), then from the buffer cache (global/local) it does do LIO (accessing buffers). Access to these buffers is synchronized (latching/locking not only on buffers but also on a higher level -> SQL statements). Ofcourse requests need to be forwarded to the database engine. You need network for that (tcp, pipe, shared memory, etc). So I think that each database has these 4 areas: Network - Synchronization - LIO - PIO Ofcourse for each database vendor there are different kind of stats / principles in each area. That is where you have to learn. Optimizing databases is basically reducing PIO, LIO, Synchronization and Network traffic ..... Anjo. On Saturday 15 February 2003 17:38, you wrote: > I overheard one guy mention that once you learn one database, you know them > all. Is this true? Or was he just talking about the theory behind the db? -- ---------------------------------------------------------------- Anjo Kolk http://www.oraperf.com -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Anjo Kolk INET: anjo@oraperf.com Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru@fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).