X-Original-To: pgsql-performance-postgresql.org@localhost.postgresql.org Received: from localhost (unknown [200.46.204.144]) by svr1.postgresql.org (Postfix) with ESMTP id B21D852837 for ; Sun, 29 May 2005 18:47:29 -0300 (ADT) Received: from svr1.postgresql.org ([200.46.204.71]) by localhost (av.hub.org [200.46.204.144]) (amavisd-new, port 10024) with ESMTP id 73764-05 for ; Sun, 29 May 2005 21:47:20 +0000 (GMT) Received: from sss.pgh.pa.us (sss.pgh.pa.us [66.207.139.130]) by svr1.postgresql.org (Postfix) with ESMTP id B869D52932 for ; Sun, 29 May 2005 18:47:17 -0300 (ADT) Received: from sss2.sss.pgh.pa.us (tgl@localhost [127.0.0.1]) by sss.pgh.pa.us (8.13.1/8.13.1) with ESMTP id j4TLlI5e018635; Sun, 29 May 2005 17:47:18 -0400 (EDT) To: "Eric Lauzon" Cc: pgsql-performance@postgresql.org Subject: Re: OID vs overall system performances on high load In-reply-to: References: Comments: In-reply-to "Eric Lauzon" message dated "Sun, 29 May 2005 16:17:11 -0400" Date: Sun, 29 May 2005 17:47:18 -0400 Message-ID: <18634.1117403238@sss.pgh.pa.us> From: Tom Lane X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, hits=0.006 tagged_above=0 required=5 tests=AWL X-Spam-Level: X-Archive-Number: 200505/426 X-Sequence-Number: 12590 "Eric Lauzon" writes: > I am still in the dark due to my lack of knowledge on internal OID management,but > i would presume that a table with OID enable and that has high load would require > some more work from pgsql internal to maintain the OID index for the database. There is no "OID index"; at least not unless you choose to create one for a given table. The only thing particularly special about OID is that there is an internal database-wide sequence generator for assigning new values. Otherwise it works a whole lot like a serial column. regards, tom lane