X-Original-To: pgsql-bugs@postgresql.org Received: from spampd.localdomain (postgresql.org [64.49.215.8]) by postgresql.org (Postfix) with ESMTP id 47A1D4763CD; Wed, 7 May 2003 07:29:02 -0400 (EDT) Received: from matrix.gatewaynet.com (unknown [217.19.69.50]) by postgresql.org (Postfix) with ESMTP id EBE14475AE5; Wed, 7 May 2003 07:28:57 -0400 (EDT) Received: from matrix.gatewaynet.com (localhost [127.0.0.1]) by matrix.gatewaynet.com (8.12.5/8.12.5) with ESMTP id h47GXP1s028216; Wed, 7 May 2003 14:33:25 -0200 Received: from localhost (achill@localhost) by matrix.gatewaynet.com (8.12.5/8.12.5/Submit) with ESMTP id h47GXOxQ028212; Wed, 7 May 2003 14:33:25 -0200 Date: Wed, 7 May 2003 14:33:24 -0200 (GMT+2) From: Achilleus Mantzios To: pgsql-sql@postgresql.org, , Subject: An unresolved performance problem. Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Spam-Status: No, hits=-17.8 required=5.0 tests=BAYES_10,SIGNATURE_LONG_DENSE,USER_AGENT_PINE autolearn=ham version=2.50 X-Spam-Level: X-Spam-Checker-Version: SpamAssassin 2.50 (1.173-2003-02-20-exp) X-Archive-Number: 200305/18 X-Sequence-Number: 5979 Hi, few days ago, i posted some really wierd (at least to me) situation (maybe a potentian bug) to the performance and bugs list and to some core hacker(s) privately as well, and i got no response. Moreover i asked for some feedback in order to understand/fix the problem myself, and again received no response. What i asked was pretty simple: "1. Is it possible that the absense of statistics make the planer produce better plans than in the case of statistcs generated with vacuum analyze/analyze? 2. If No, i found a bug, 3. If yes then under what conditions?? 4. If no person knows the answer or no hacker wants to dig into the problem then is there a direction i must follow to understand/fix whats going on myself??"" Pretty straight i think. Well, i stack on step 1. It seemed to me that either my question was too naive to deserve some real investigation (doubtedly), or no one was in a position to comment on it (doubtedly), or that it is not considered an interesting case (possible), or that some people move all the mail i send to the lists to /dev/null (unfortunately possible too). So Since i really have stuck to postgresql for over 2 years for both technical and emotional reasons, i would feel much more confident if i would reach step 2 or greater. The table i have in question is a critical one in my application since it monitors important plan maintenance data, and i have to move on with this problem. Thanx P.S. the www (64.49.215.82) server is down for while. -- ================================================================== Achilleus Mantzios S/W Engineer IT dept Dynacom Tankers Mngmt Nikis 4, Glyfada Athens 16610 Greece tel: +30-210-8981112 fax: +30-210-8981877 email: achill@matrix.gatewaynet.com mantzios@softlab.ece.ntua.gr