X-Original-To: pgsql-performance-postgresql.org@localhost.postgresql.org Received: from localhost (mx1.hub.org [200.46.208.251]) by postgresql.org (Postfix) with ESMTP id 09E869FA220 for ; Fri, 2 Jun 2006 17:37:05 -0300 (ADT) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.208.251]) (amavisd-new, port 10024) with ESMTP id 18162-02 for ; Fri, 2 Jun 2006 17:36:57 -0300 (ADT) X-Greylist: from auto-whitelisted by SQLgrey- Received: from bundure.hst.terra.com.br (bundure.hst.terra.com.br [200.176.10.195]) by postgresql.org (Postfix) with ESMTP id 228F29FA0E5 for ; Fri, 2 Jun 2006 17:36:56 -0300 (ADT) Received: from caiguna.hst.terra.com.br (caiguna.hst.terra.com.br [200.176.10.4]) by bundure.hst.terra.com.br (Postfix) with ESMTP id 866109A0276; Fri, 2 Jun 2006 17:36:55 -0300 (BRT) X-Terra-Karma: -2% X-Terra-Hash: 298ece97623891779f2a4809626ac184 Received-SPF: pass (caiguna.hst.terra.com.br: domain of terra.com.br designates 200.176.10.4 as permitted sender) client-ip=200.176.10.4; envelope-from=carlosreimer@terra.com.br; helo=reimer; Received: from reimer (unknown [200.180.59.84]) (authenticated user carlosreimer@terra.com.br) by caiguna.hst.terra.com.br (Postfix) with ESMTP id F240AD28160; Fri, 2 Jun 2006 17:36:52 -0300 (BRT) Reply-To: From: To: "Mark Lewis" Cc: "Tom Lane" , Subject: RES: RES: Initial database loading and IDE x SCSI Date: Fri, 2 Jun 2006 17:37:01 -0300 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) In-Reply-To: <1149279209.20798.108.camel@archimedes> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2869 Importance: Normal X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200606/14 X-Sequence-Number: 19371 Many thanks Mark, I will consider fsync=3Doff only to do an initial load, not for a = database normal operation. I was just thinking about this hipotetical scenario:=20 a) a restore database operation b) fsync off c) write-back on (IDE) As I could understand, in this sceneraio, it=C2=B4s normal the IDE drive = be faster than the SCSI, ok? Of course, the database is exposed because of the fsync=3Doff, but if = you consider only the system performance, then it is true. Isn=C2=B4t = it? Thanks, Reimer