Received: from localhost (uranus.hub.org [200.46.204.60]) by postgresql.org (Postfix) with ESMTP id B85829F9FE1 for ; Sat, 18 Nov 2006 14:11:14 -0400 (AST) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.204.60]) (amavisd-new, port 10024) with ESMTP id 19459-01 for ; Sat, 18 Nov 2006 14:11:11 -0400 (AST) X-Greylist: from auto-whitelisted by SQLgrey- Received: from sss.pgh.pa.us (sss.pgh.pa.us [66.207.139.130]) by postgresql.org (Postfix) with ESMTP id 7D1649F9B3F for ; Sat, 18 Nov 2006 14:11:10 -0400 (AST) Received: from sss2.sss.pgh.pa.us (tgl@localhost [127.0.0.1]) by sss.pgh.pa.us (8.13.6/8.13.6) with ESMTP id kAIIB8fm000198; Sat, 18 Nov 2006 13:11:08 -0500 (EST) To: "rakesh kumar" cc: pgsql-performance@postgresql.org Subject: Re: start up cost estimate In-reply-to: <9851130611180133y3ca36219td95b555ac8f2ee71@mail.gmail.com> References: <9851130611180133y3ca36219td95b555ac8f2ee71@mail.gmail.com> Comments: In-reply-to "rakesh kumar" message dated "Sat, 18 Nov 2006 15:03:48 +0530" Date: Sat, 18 Nov 2006 13:11:08 -0500 Message-ID: <197.1163873468@sss.pgh.pa.us> From: Tom Lane X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200611/148 X-Sequence-Number: 21918 "rakesh kumar" writes: > I wanted to know , how the start up cost is computed in postgresql Look into http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/path/costsize.c regards, tom lane