From owner-freebsd-hackers@FreeBSD.ORG Fri Nov 10 09:24:22 2006 Return-Path: X-Original-To: freebsd-hackers@freebsd.org Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id A560816A412 for ; Fri, 10 Nov 2006 09:24:22 +0000 (UTC) (envelope-from chinhngt@sectorb.msk.ru) Received: from hq.sectorb.msk.ru (petaflop.b.gz.ru [194.88.210.5]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4AADC43D4C for ; Fri, 10 Nov 2006 09:24:19 +0000 (GMT) (envelope-from chinhngt@sectorb.msk.ru) Received: from it.local (it.local [172.16.20.8]) by hq.sectorb.msk.ru (Postfix) with ESMTP id 0E00F32C5 for ; Fri, 10 Nov 2006 12:24:15 +0300 (MSK) Date: Fri, 10 Nov 2006 12:24:13 +0300 (MSK) From: Nguyen Tam Chinh X-X-Sender: chinhngt@it.hackers To: freebsd-hackers@freebsd.org Message-ID: <20061110121247.E953@it.hackers> X-Operating-System: FreeBSD 6-STABLE Keywords: 216091683 MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Subject: Value range of IPC semaphores X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 10 Nov 2006 09:24:22 -0000 Hello, I'm tuning some IPC semaphores parameters in 6.1-STABLE for a busy PostGreSQL server (8.1.4). I still now can not find the value range (exactly the maximum value) and its dependencies on other system wide parameters of these parameters: kern.ipc.semmni, kern.ipc.semmns, kern.ipc.shmseg and kern.ipc.shmmni. The server is a dual Xeon 3.6 with 8Gb of RAM. Please advice. PS. The last change for me is going to read the source code, but I hope that someone in this mailing-list would tell me where to read or would give a good answer. ----- With best regards, | The Power to Serve Nguyen Tam Chinh | http://www.FreeBSD.org Loc: sp.cs.msu.su |